Copper pipe GOST 617 2006 — buy at the price of the manufacturer wholesale and retail.

1.1. Pipes are manufactured in accordance with the requirements of this standard according to the technological regulations approved in the prescribed manner, from copper grades M1, M1r, M2, M2r, M3, M3r with a chemical composition in accordance with GOST 859, tompak grade L96 with a chemical composition in accordance with GOST 15527.

Pipes from tombak brand L96 are produced with a diameter of up to 30 mm inclusive, drawn and cold rolled.
1.2. Main parameters and dimensions

1.2.1. The outer diameter, wall thickness of drawn and cold-rolled pipes and limit deviations for them must correspond to those given in Table 1.

S. 7 GOST 617-90

Notes:

1. Theoretical mass calculated from nominal diameter and nominal wall thickness. The density of copper is taken equal to 8.9 g/cm 3 . The theoretical mass is a reference.

2. Pipe sizes in brackets are not recommended.

table 2

Continuation of the table. 2

Note. The theoretical mass is calculated from the nominal diameter and nominal wall thickness. The density of copper is taken equal to 8.9 g/cm 3 . The theoretical mass is a reference.

1.2.2. The outer diameter, the wall thickness of the pressed pipes and the maximum deviations for them must correspond to those given in Table 2.

1.2.3. The length of the pipe is made:

unmeasured length:

from 1.5 to 6 m - drawn and cold-rolled;

from 1 to 6 m - pressed.

Note. Drawn and cold-rolled pipes with a length of less than 1.5 m, but not less than 1 m, pressed with a length of less than 1 m, but not less than 0.5 m, are allowed in an amount not exceeding 10% of the batch weight;

measured length or multiple measured length - within random length - drawn and cold rolled;

not less than 10 m long in coils - drawn pipes with a wall thickness of up to 2.5 mm inclusive and with an outer diameter of up to 12 mm inclusive - in a soft and hard state, more than 12 to 18 mm inclusive - in a solid state -

1.2.4. Limit deviations along the length of pipes of measured length must correspond to those given in table. 3.

Table 3

Pipes of multiple measured lengths must be manufactured with an allowance of 5 mm for each cut and with maximum deviations for the total length established for pipes of measured length.

Symbols of pipes are put down according to the scheme

with the following abbreviations:

Note. The X sign is used for missing data, except for the designation of length and special conditions.

Symbol examples:

Drawn pipe, round, of normal manufacturing accuracy, soft, with an outer diameter of 28 mm and a wall thickness of 3 mm, a length of 3000 mm, increased accuracy in length, made of M2 grade copper:

Pipe DKRNM 28x3X3000 M2B GOST 617-90

Pressed pipe, round, with an outer diameter of 90 mm and an inner diameter of 60 mm, random length, made of MZ grade copper:

Pipe GKRKHH 90X60 ND MZ GOST 617-90

1.3. Characteristics

1.3.1. Basic version

1.3.1.1. Drawn and cold-rolled pipes are produced in soft and hard states.

1.3.1.2. The outer and inner surfaces of the pipes must be free from contaminants that impede visual inspection, without cracks, delaminations, captivity, bubbles, shells and tears.

Separate surface defects are allowed - dents, depressions, nicks, risks, small captivity, scuffs, if they do not remove the pipes during the control stripping beyond the maximum deviations in size.

On the surface of the pipes, ringing, tint colors, traces of straightening, minor local darkening are allowed.

S. 12 GOST 617-90

1.3.1.3. Pipes must be straight cut and free from significant burrs.

The oblique cut should not exceed, mm:

2 - for pipes with an outer diameter of up to 20 mm;

3 » » » » St. 20 to 50 mm;

4 » » » » » 50 » 100 mm;

5 » » » » » 100 » 170 mm;

7 » » » » 170 mm.

It is allowed to manufacture pipes in coils with chopped ends.

1.3.1.4. The difference in wall thickness should not take the dimensions of the pipes beyond the limiting deviations in wall thickness.

The ovality for drawn and cold-rolled pipes of solid and semi-solid state with a wall thickness of at least 1/30 of the outer diameter and pressed pipes with a wall thickness of at least 1/15 of the outer diameter should not take the pipe dimensions beyond the maximum deviations in the outer diameter.

Ovality is not set:

drawn and cold-rolled pipes in a soft state;

drawn and cold-rolled pipes in semi-solid and solid states with a wall thickness of less than 1/30 of the outer diameter;

pressed pipes with a wall thickness of less than 1/15 of the outer diameter, 1.3.1.5. Drawn and cold-rolled (hard and semi-solid) pipes with an outer diameter of more than 10 mm in lengths, as well as pressed pipes, must be straightened. The curvature per 1 m of the pipe length should not exceed the values ​​given in Table 4.

Table 4

The total curvature should not exceed the product of curvature per 1 m of length and the total length of the pipe in meters.

Curvature is not set:

for pipes made in coils;

for drawn and cold-rolled pipes in a soft state;

for drawn and cold-rolled pipes in semi-solid and solid state with outer diameter less than 11 mm.

GOST 617-90 S. 13

1.3.1.6. The mechanical properties of the pipes must correspond to those given in Table 5.

Table 5

1.3.1.7. Pipes must be sealed.

1.3.2.Execution at the request of the consumer

1.3.2.1. Pipes are manufactured with the norms of maximum deviations in outer and inner diameters.

Limit deviations for the inner diameter must correspond to the limit deviations for the outer diameter given in table. 1 and 2, and the maximum maximum deviation of the wall thickness from the nominal at any point should not exceed the values ​​given in Table. 1 and 2 by more than 50%.

Limit deviations are set for two sizes - outer and inner diameters

1.3.2.2. Drawn and cold-rolled pipes are manufactured with increased accuracy with maximum deviations in outer diameter, mm:

minus 0.14 - for pipes with an outer diameter of 3 to 10 mm inclusive.

±0.25 » » » » from 104 to 120 mm incl.

1.3.2.3. Drawn and cold-rolled pipes with an outer diameter of up to 100 mm inclusive are manufactured with increased accuracy with maximum deviations in wall thickness, mm:

±0.35 for wall thickness 5.0 mm;

±0.42 » » » 6.0 mm;

±0.49 » » » 7.0 mm;

±0.56 » » » 8.0 mm.

1.3.2.4. Soft drawn pipes with an outer diameter of more than 12 to 18 mm inclusive and a wall thickness of up to 2.5 mm inclusive are manufactured in coils with a length of at least 10 m.

1.3.2.5. Drawn pipes are made in coils of increased length of at least 100 m.

1.3.2.6. Pipes are manufactured with increased accuracy in length with maximum deviations along the length of pipes of measured length, mm:

3 - with a pipe length of up to 2 m;

6 » » 2 to 4 m;

10 » » » St. 4 m

1.3.2.7. Drawn and cold-rolled pipes of solid state in segments are produced with high accuracy in curvature. Curvature per 1 m of length should not exceed, mm:

2 - for pipes with outer diameter from 11 to 115 mm inclusive;

4 » » » » St. 115 mm.

1.3.2.8. On pipes with an outer diameter of 53 mm and a wall thickness of 1.5 mm, intended for the manufacture of bimetallic pipes, individual surface defects are allowed - dents, nicks, risks, small caps, scuffs, if they do not lead the pipe beyond half the maximum deviations in wall thickness.

1.3.2.9. Drawn and cold-rolled pipes must pass the flattening test until the pipe walls come into contact without cracks or tears. In places of bending, a gap equal to the wall thickness is allowed.

Solid and semi-solid pipes shall pass the flattening test after annealing.

Pipes made of deoxidized copper grades M1r, M2r, M3r must withstand the flattening test after annealing in a hydrogen environment.

1.3.2.10. Drawn and cold-rolled pipes with an internal diameter of 30 to 144 mm must pass the 90° bead bend test without cracking or tearing.

The width of the bend should be 25% of the inner diameter of the pipe, but not more than 25 mm.

Solid and semi-solid pipes shall pass the bead deflection test after annealing.

Pipes made of deoxidized copper grades M1r, M2r, M3r must withstand the bead bending test after annealing in a hydrogen environment.

Soft pipes made of copper grades M1, M2, MZ and tompak grade L96 are tested in the delivery condition.

1.3.3. Execution by agreement between the manufacturer and the consumer

1.3.3.1. Pipes are made of intermediate sizes in diameter and wall thickness with maximum deviations for them for the following bigger size given in table. 1 and 2.

1.3.3.2. Pressed pipes with a wall thickness of 5.0; 10.0 and 15.0 mm are manufactured with increased accuracy in wall thickness with maximum deviations of ± 9% of the nominal wall thickness.

1.3.3.3. Drawn and cold-rolled pipes are made to measure length, m, not less than:

5 - with an outer diameter of St. 100 to 150 mm inclusive;

4 » » » 150 » 300 mm incl.;

3 » » » » 300 » 360 mm incl. and wall thickness 3.5 mm;

2.5 » » » » 300 » 360 mm incl. and wall thickness of 4 mm or more.

1.3.3.4. Pressed pipes are made to measure length or a multiple of measured length.

1.3.3.5. Pipes with an outer diameter of over 18 to 40 mm inclusive and a wall thickness of up to 3 mm inclusive are manufactured in coils.

1.3.3.6. Pipes are made with a length exceeding that given in clause 1.2.3. At the same time, limit deviations in length, cut obliqueness and curvature are set by agreement between the manufacturer and the consumer.

1.3.3.7. Pressed pipes with an outer diameter of up to 150 mm inclusive are made with a curvature per 1 m of length over 5 mm, but not more than 10 mm.

1.3.3.8. Pipes are made in a semi-solid state with the mechanical properties indicated in Table. 5.

1.3.3.9. Pipes with an outer diameter of over 10 mm and a wall thickness of 1 mm or more are manufactured with Vickers hardness HV 5/30:

no more than 55 - for pipes in a soft state;

90-135 - for pipes in the solid state;

no more than 55 - for pressed pipes with a diameter of up to 200 mm.

At the same time, the tensile strength and relative elongation after rupture are not regulated.

1.3.3.10. Pipes in a soft state are made of increased plasticity with the following standards of mechanical properties:

temporary resistance s in - not less than 210 (21) MPa (kgf / mm 2);

relative elongation after rupture 6yu - not less than 40% .

Semi-solid and solid pipes are made of increased strength with the following standards of mechanical properties:

for pipes in semi-solid state:

temporary resistance s in - not less than 270 (28) MPa (kgf / mm 2);

relative elongation after rupture s 10 - not less than 8%;

for pipes in solid state:

temporary resistance s in - not less than 310 (32) MPa (kgf / mm 2);

relative elongation after rupture s 10 - not less than 2%.

1.4. Marking

1.4.1. Each bundle (coil) of pipes must be labeled with:

trademark or trademark and the name of the manufacturer;

symbol of pipes or metal grade, pipe dimensions, manufacturing accuracy, material condition, designation of this standard;

lot numbers;

technical control stamp or number of the technical controller.

1.4.2. On each pipe without packaging and not in a bundle, the data given in clause 1.4.1 must be applied with indelible paint.

These data may be indicated on a label affixed to the inner surface of the pipe, or on a wooden and metal label attached to the pipe.

On pipes intended for the manufacture of bimetallic pipes, the data given in clause 1.4.1 are indicated on a label pasted on the inner surface of the pipe.

1.4.3. Transport marking - according to GOST 14192.

1.5. Packing-1.5.1. Pipe sizes given in table. 6 (including pipes in bays), packed in wooden boxes.

The mass of pipes in coils should not exceed 80 kg. The weight of pipes in coils is more than 80 kg. Pipes in segments with an outer diameter of not more than 40 mm and a mass of not more than 25 kg are tied into bundles with a mass of not more than 80 kg.

Each bundle and bay of pipes must be tied with a wire with a diameter of at least 1.2 mm or twine made of synthetic materials in at least two turns and at least in two places (a bay - in three places evenly) in such a way that mutual movement of pipes is excluded . The ends of the wire are connected by twisting at least five turns.

It is allowed, in the absence of transshipment on the way, to transport pipes in covered wagons and containers in bundles without packing in boxes.

Packaging must ensure the safety of pipes.

As containers and packaging materials can be used:

boxes according to GOST 2991, GOST 10198;

wooden crates according to GOST 12082;

containers according to GOST 15102, GOST 22225, OST 48-218;

wire according to GOST 3282;

tape according to GOST 1173, GOST 3560.

Other types of packaging and packaging materials are allowed to ensure the safety of pipes during transportation, according to the regulatory and technical documentation.

1.5.2. Packing of pipes to the regions of the Far North and equivalent regions - in accordance with GOST 15846.

1.5.3. Cargo items must be formed into transport packages.

Overall dimensions of packages - in accordance with GOST 23238, GOST 24597. Means of fastening in transport packages - in accordance with GOST 21650. Weight of a package should not exceed 5000 kg. The mass of a package when transported in covered wagons should not exceed 1250 kg.

It is allowed not to bundle solid state pipes of all sizes, semi-solid state pipes with a wall thickness of 1 mm or more with a ratio of outer diameter and wall thickness equal to 19 or less, soft state pipes with a wall thickness of 1 mm or more with a ratio of outer diameter and wall thickness equal to 12 or less, when transporting pipes in packages weighing up to 1500 kg in the absence of overload on the way.

Bundling is carried out on pallets according to GOST 9557 or without pallets using bars with a cross section of at least 50x50 mm with a strapping wire with a diameter of at least 3 mm or a tape with a size of at least 0.3x30 mm or using bundled slings. The ends of the strapping wire are fastened with a twist in five turns, the tapes - in the lock.

1.5.4. In each container or in one of the boxes of the container, a packing list must be enclosed, on which the data listed in clause 1.4.1 must be indicated.

2. ACCEPTANCE

2.1. Pipes are accepted in batches. The batch must consist of pipes of the same grade of metal, the same size, the same material condition, the same accuracy and manufacturing method, and must be issued with a quality document containing:

trademark or trademark and name of the manufacturer;

symbol pipes;

test results (at the request of the consumer);

lot number;

lot of the party. It is allowed to draw up one quality document for several

batches of pipes of the same size, condition, accuracy, manufacturing method and one grade of metal, shipped simultaneously to one consumer.

The batch weight should not exceed 5000 kg.

2.2. To control the quality of the inner surface (with the exception of pipes with an internal diameter of 20 mm or less and pipes in coils), outer surface, diameter, wall thickness (with the exception of pipes with an internal diameter of 12 mm or less), length, cut obliqueness, curvature, ovality, pipes are selected “blindly” from the batch (by the method of greatest objectivity) in accordance with GOST 18321. Control plans correspond to GOST 18242.

The number of controlled pipes (bays) is determined according to table.7.

Table 7

Number of pipes in a batch (N) calculated by the formula

where m- mass of pipes in a batch, kg;

mT- theoretical mass of 1 m of pipe, kg;

l cf. - average pipe length, m.

The batch is considered to meet the requirements of the standard if the rejection number is less than that given in Table. 7.

It is allowed for the manufacturer, upon receipt of unsatisfactory results, to control each pipe (bay) according to the parameter for which unsatisfactory results were obtained.

2.3. To control the quality of the inner surface of pipes with an inner diameter of 20 mm or less and pipes in coils, five pipes are selected from the batch.

2.4. To control the wall thickness of pipes with an internal diameter of 12 mm or less, five pipes are selected from the batch.

2.5. For tensile testing (tensile strength, elongation after rupture), Vickers hardness, three pipes (coils) are selected from the batch.

The tensile test is carried out at the request of the consumer.

2.6. For flattening and beading tests, three pipes (coils) are selected from the batch.

The test for flattening and beading is carried out at the request of the consumer.

2.7. Three pipes from the batch are selected for the leak test.

The tightness test is carried out at the request of the consumer.

Pipes with an outer diameter of up to 12 mm and more than 50 mm in segments, as well as pipes in coils, are not subjected to a leak test at the manufacturer.

2.8. To determine the chemical composition, two pipes (coils) are selected from the batch.

It is allowed at the manufacturing plant to carry out sampling from molten metal.

It is allowed at the manufacturer to control periodically, once every three months, the content of bismuth, tin, arsenic, sulfur and oxygen in copper, provided that their content complies with the requirements of GOST 859, the content of antimony, bismuth, phosphorus in the L96 tompak, provided that their content complies requirements of GOST 15527.

2.9. If unsatisfactory test results are obtained for at least one of the indicators, with the exception of those carried out using statistical acceptance control, it is retested on a double sample taken from the same batch.

The results of the repeated test shall be applied to the entire batch.

3. CONTROL METHODS

3.1. Inspection of the surface of the pipes is carried out without the use of magnifying devices.

To inspect the inner surface of pipes with an internal diameter of up to 20 mm inclusive and pipes made in coils, one sample 150 mm long should be taken from each selected pipe (coil). The samples are cut lengthwise into two parts and inspected.

Inspection of the inner surface of pipes with an inner diameter of more than 20 mm is carried out on an illuminated screen.

3.2. The outer diameter of the pipes is measured with a micrometer according to GOST 6507. The wall thickness of the pipes is measured with a micrometer according to GOST 6507 or an indicator wall gauge according to GOST 11358.

To control the wall thickness, specimens 150 mm long are cut from each of the controlled pipes with an internal diameter of 12 mm or less, cut lengthwise into two parts and measured with a micrometer according to GOST 6507 with turned legs.

The diameter measurement is carried out at a distance of at least 30 mm from the ends of the pipe at three points in any section along the length of the pipe, the wall thickness is measured at a distance of at least 5 mm from the ends of the pipe.

It is allowed to control the diameter and wall thickness of pipes with another tool that provides the necessary accuracy.

The length of the pipes is measured with a tape measure according to GOST 7502 or a metal ruler according to GOST 427.

Ovality, curvature, cut obliqueness are measured in accordance with GOST 26877.

3.3. Statistical surface and dimensional control provides surface quality and pipe dimensions with a 96% probability (AQL=4%).

3.4. For tensile and hardness tests, one sample is taken from each selected pipe (coil).

Selection and preparation of samples for tensile testing is carried out in accordance with GOST 24047.

The tensile test is carried out according to GOST 10006 on short or long longitudinal specimens.

The Vickers hardness test is carried out according to GOST 2999.

3.5. For the flattening test, one sample is taken from each selected pipe (coil).

For pipes with an outer diameter of more than 50 mm, it is allowed to test samples in the form of separate segments, the arc length of which must be at least 50 mm. The sample width must be at least 25 mm.

Samples of pipes of semi-solid and solid state from copper grades M1, M2,

MZ and tompak brand L96 are annealed at a temperature of 550-650 ° C for 1-1.5 hours.

Samples of pipes made of copper grades M1r, M2r, M3r (regardless of the state of the pipe material) are annealed in a hydrogen environment at a temperature of 800-850 ° C for 30 minutes.

The flattening test is carried out according to GOST 8695.

3.6. For the beading test, one sample is taken from each selected pipe.

Semi-solid and solid pipe specimens are annealed at a temperature of 550-650 °C for 1-1.5 hours.

Samples of pipes made of copper grades M1r, M2r, M3r (regardless of the state of the pipe material) are annealed in a hydrogen environment at a temperature of 800-850 ° C for 30 minutes.

The beading test is carried out according to GOST 8693.

3.7. The tightness test is carried out by one of the following methods: hydraulic pressure of 5 MPa (50 kgf / cm 2) for 10 s according to GOST 3845, or a non-destructive control method according to a procedure agreed between the manufacturer and the consumer, or air pressure 0.65-0.8 MPa 7-8 kgf/cm 2) for 5 s in a bath filled with water, without air leakage from the pipe.

If there are disagreements in assessing the quality, the tightness test is carried out with a hydraulic pressure of 5 MPa (50 kgf / cm 2) for 10 s in accordance with GOST 3845.

3.8. To analyze the chemical composition, one sample is cut from each selected pipe (bay).

Sampling for analysis of the chemical composition is carried out according to GOST 24231.

The analysis of the chemical composition is carried out according to GOST 13938.1 - GOST 13938.13, GOST 9717.1 - GOST 9717.3 or other methods that provide the specified accuracy.

In case of disagreement in the assessment of the chemical composition, the analysis is carried out according to GOST 13938.1 - GOST 13938.13.

3.9. It is allowed, upon agreement between the manufacturer and the consumer, to apply statistical methods for monitoring mechanical properties.

3.10. The manufacturer is allowed to use other test methods that provide the necessary accuracy. In case of disagreement in the definition of indicators, control is carried out by the methods specified in the standard.

4. TRANSPORT AND STORAGE

4.1. Pipes are transported by all means of transport in covered vehicles in accordance with the rules for the carriage of goods in force for this type of transport.

For pipes longer than 3 m vehicles define

in accordance with the rules for the carriage of goods in force on this type of transport.

4.2. Pipes must be stored indoors and must be protected from mechanical damage, moisture and active chemicals.

Subject to specified conditions storage consumer properties of pipes during storage do not change.

INFORMATION DATA

1. DEVELOPED AND INTRODUCED by the Ministry of Metallurgy of the USSR

DEVELOPERS

V. N. Fedorov, Doctor of Engineering sciences; Yu. M. Leibov, Ph.D. tech. sciences (topic leader); N. S. Izvolskaya; O. S. Nikitina

2. APPROVED AND INTRODUCED BY Decree State Committee USSR on product quality management and standards dated 06/22/90 No. 1744

3. REPLACE GOST 617-72

4. REFERENCE REGULATIONS AND TECHNICAL DOCUMENTS

Standards 11383 from ´75 and 617 from 2006 are regulatory documents that apply to brass and copper pipes. At the same time, GOST 11383 applies to round drawn thin-walled tubes used in various industries, and 617-2006 - to round cold-formed and extruded products. general purpose. The documents establish requirements, acceptance conditions, assortment, test methods, control, storage, marking and transportation of pipes.

Copper pipes have high strength, ease of installation, long service life

Application of copper pipes

Copper communications are a fairly common solution for arranging systems for various purposes. Due to their properties, they can be used as a gas pipeline, fuel pipeline, water pipeline, as well as in heating systems and industry.

As elements of water pipes for various purposes, copper products are used based on the length of the service life, chemical inertness to a substance such as chlorine, bactericidal properties and corrosion resistance. At the same time, installation is possible both for a single consumer and for multi-storey buildings.

For heating systems, copper pipes are good due to their ability to withstand pressure surges and temperatures up to 250 degrees. Such characteristics are explained by the high plasticity of communications. When used in warm floors copper elements do not wear out.

The use of copper fuel pipelines is possible due to the high tightness of the installed system. The same property allows you to carry out the wiring of gas pipelines, for example, in apartments.

In addition, copper pipes are included in the construction of various hydraulic and brake systems, heat exchangers, aircraft and trucks, climate circuits, etc.

Copper pipes are the basis of plumbing, heating and other communications, including underground

Ways to produce communications

GOST defines 2 technological operations for obtaining a copper pipe:

• rental;
• pressing (subsequent welding of joints is supposed).

Both methods are suitable for the production of round pipes. Products with a square section are made mainly by pressing. Rolled pipes involve the use of a cold deformation method. Without preheating, a ductile metal - copper - can be rolled between two rollers. A blank is simply put on the rolling mill - a sleeve. It rolls out to the required diameter.

At the stage of final processing, communications are divided into unannealed pipes and annealed products. The first type is stronger than heat-treated counterparts, since during rolling the material was compacted by deformation of the crystal lattice.

Pressed products are made from copper sheets on special machines. From each sheet, a measured blank is cut, which is fed to the molding press rollers. After giving the necessary shape, the butt joint is welded.

Note! This process assumes the presence of an inert gas environment.

At the last stage, the welded pipe is passed through the sizing rolls, which align the profile of the product, as well as correct the longitudinal deformation.

Copper pipes are supplied in coils or straight lengths - it depends on their diameter

Assortment of thin-walled copper products

Document 11383-75 copper tubing must have the dimensions shown in the table.

Limit deviations of diameters according to document 617-2006

Copper pipes (GOST 617) can be manufactured with different diameters, lengths and wall thicknesses.

Like other types of pipes, copper products come in different diameters and with different wall thicknesses.

The allowable nominal outer size of a cold-formed pipe and its limiting deviations are given in the table.

Having agreed with the consumer, it is possible to manufacture a pipe (cold-formed) with a deviation in the average diametrical size. The corresponding values ​​according to GOST 617 are given in the table.

Pressed pipes should not go beyond the limit deviations in diameter (according to GOST 617) given in the table.

Permissible dimensions of thin-walled pipes

Standard 11383 defines tolerances for wall thickness (thin-walled drawn pipes) depending on manufacturing accuracy. The corresponding values ​​are given in the table.

Thin wall tubing (Standard 11383-75) can be produced in lengths from one to three meters. It is possible to have products from half a meter to 1 meter, but their number should not exceed 10% of the mass of the entire batch.

The sections in which copper pipes are produced have length restrictions

If the outer diameter is less than 1 centimeter, then manufacturing in bays is acceptable. Their length is limited to 10 meters. The upper limit of the length of a pipe section of more than 3 meters is 4.5 m. The deviation along the length of a measured product is up to +10 mm.

Document 11383-75 also defines the curvature of solid tubes. The required values ​​are given in the table.

According to customer requirements, the curvature of the tubes can be less than 3 millimeters.

Limit deviations of wall thicknesses

GOST 617 defines wall thicknesses and their deviations for a cold-formed tube. The corresponding values ​​are given in the table.

It is acceptable to manufacture copper tubes with intermediate wall thicknesses. Limit deviations in this case are selected based on the nearest value.

Note! By agreement with the consumer, it is possible to produce copper products for which deviations are expressed as a percentage of the total thickness.

The thickness of the pipe wall is also regulated by GOST, but in agreement with the customer, products of non-standard sizes can also be produced.

For cold-formed pipes, the corresponding parameters according to GOST 617 are given in the table.

According to GOST, pressed copper pipes must have walls with maximum deviations indicated in the table.

Standardization of copper pipe length

GOST 617-2006 standardizes the lengths of copper pipes. Products can be produced in bays or segments. In the second case, it is allowed to manufacture pipes of random, as well as measured (or multiple measured) lengths. So, the length of cold-formed products can be in the range of 15-60 (*10 -1 m), pressed - 10-60 (*10 -1 m).

Coils with pipes can be both free and ordered winding

For pipes with a length that is a multiple of the measured length, it is necessary to allow half a centimeter for each cut, and the deviations of the total length are set as for products of the measured length.

Pipes in coils are supplied with a length of at least 10 meters with an outer diameter of up to 1.8 cm. Upon agreement with the consumer, drawn products can be made in coils of the following types:

1. BT - coil of free winding.
2. BU - a bay of ordered layer-by-layer winding.
3. BS - a bay of spiral flat winding.

For products of measured length, the maximum deviations must correspond to the values ​​in the table.

Similar parameters, if there is an increased manufacturing accuracy, are given in the table.

Conventional designation of copper tubes

GOSTs 617-2006 and 11383-75 establish general scheme designation of products. Its composition, broken down by documents, is given in the table.

D - cold-formed (cold-rolled or drawn)

H - normal (in diameter and wall)

P - increased (in diameter and wall)

K - increased (along the wall) and normal in diameter

Y - in % of the wall thickness

C - normal (according to the average value of the diameter)

L - soft with increased plasticity

F - semi-solid with increased strength

H - hard with increased strength

KD - multiple dimensional

O - pipes with increased accuracy in length

P - regulated requirements regarding tensile tests

H - regulated requirements regarding Vickers hardness measurements

G - pressed blank

C - welded billet

P - any workpiece

Some characteristics of copper pipes

Unlike steel pipes, copper pipes are not afraid of freezing water inside the system. Due to plasticity, they can expand. After defrosting, the walls of the products do not crack and are able to function effectively again.

Copper pipes are able to withstand high pressure, high temperature and do not fail when these indicators fluctuate.

The roughness of a copper tube is 100 times lower than that of a steel tube and 5 times lower than that of a plastic tube. Thus, a high throughput pipeline when using communications of smaller diameters.

Note! If the temperature of the liquid medium is 100 ºС, then the copper plumbing can withstand a pressure of 2.2-23 (*10) atmospheres.

The use of a copper pipe in a sheath will protect the network from the influence of stray currents, as well as reduce heat loss. Thanks to the protective coating, the formation of condensate on the product becomes impossible. The insulation can be a polyethylene layer, a polyurethane foam coating, and other polymeric forms.

The chemical composition of copper for pipes according to GOST 617

GOST 617 determines the content of impurities in copper for the manufacture of pipes for grades: M3r, M1, M1f, M2, M1r, M3 and M2r.

Basic mechanical properties of products

Regulatory documents for copper products define the mechanical properties that the finished product must have.

For pipes of increased strength, GOST indicates the mechanical properties that they must have

The corresponding indicators according to GOST 617 are given in the table (symbols: P - tension, P - strength determination, linear dimensions in millimeters).

Having agreed with the consumer, it is possible to produce pipes in a soft state with increased plasticity, and hard and semi-solid pipes with increased strength.

For such cold-formed products, the mechanical properties should be in accordance with the table.

Pipe surface requirements

GOST 617, like document 11383-75, defines the basic requirements for the surface of products. The inside and outside of the pipe must be free of contaminants that hinder inspection.

Note! According to the standard 11383-75, the presence of shells, cracks or delaminations on the surface of the finished product is strictly unacceptable.

Individual minor surface defects are possible, dents not larger than a quarter of a millimeter, the number of which is not more than 2 per meter of length, if they do not take the overall dimensions beyond the maximum deviations (GOST 11383 from ´75). At the same time, no more than 10% of products with such defects are allowed in the batch.

If solid copper tubes (document 11383) are manufactured with increased precision, then local indentations may be no more than 0.2 mm deep and the number of such products may not exceed 2% of the entire lot. The presence of ringing, discoloration, oxidation, local darkening is acceptable, which do not impede visual inspection.

When checking the quality of pipes, not only their mechanical properties are evaluated, but also their appearance.

Oblique cut and ovality according to GOSTs

Thin-walled copper tubing (11383-75) must be cut straight and free of burrs. The standard standardizes the cut oblique, which for products with a diameter of up to one centimeter is no more than one millimeter, and for large pipes - two millimeters. If the products are delivered in coils, then there are no restrictions on this parameter.

The difference in wall thicknesses should not go beyond the limit deviations (GOST 11383). If this value is less than 1/20 of the outer diameter, the required ovality is less than 0.5 mm (for high-precision products - 0.25 mm). In agreement with consumers, this figure can be increased.

GOST 617 defines the values ​​of the cut cosine, which are presented in the table.

According to this standard, ovality is not established:

• for pipes in coils;
• pressed with a wall less than 1/15 of the outer size;
• cold-formed in solid and semi-solid states with a wall less than 1/30 of the external size;
• cold-formed products in a soft state.

GOST 617 also allows the production of pipes in coils, in which the ends are chopped off.

Acceptance of pipes according to document 11383-75

According to GOST, products are accepted in batches. Each of them should not exceed 500 kg in mass.

Pipes can be supplied in small batches, which includes one size of the product

The batch may include tubes of the same size, grade of alloy or metal, material condition and manufacturing accuracy. The accompanying document states:

• the size;
• trademark;
• brand of alloy or metal;
• the manufacturing method used;
• material condition;
• the number of the respective batch;
• lot net weight;
• standard.

At the request of the consumer accompanying document quality may also contain test results. Checking the outer surface is carried out for each pipe of the batch, internal - 3 products with a diameter of more than 3 mm, from every hundred kilograms. If the internal dimension is less than 3 mm, then such a check is not performed.

Note! Tests for tightness and flattening of tubes from welded billets are subjected to 3 products from a batch. 2 tubes from a batch are subject to chemical analysis.

If the results obtained are unsatisfactory in at least 1 of the required indicators, then repeated tests are necessary. They should be doubled more samples taken from the same lot. The results of the retests apply to the entire test lot.

Test Methods Used

When examining the outer surface, magnifying devices are not used. If the tubes are made without ringing, then the control is carried out by comparison with reference samples, which are agreed with the consumer. Inspection of the surface of products with a diameter of more than 2 cm inside is carried out on light screens.

The outer diameter is measured with a micrometer, the division value of which is 1/100 mm (GOST 6507) or with another device capable of providing the specified accuracy. To control the wall thickness (for products with a diameter of less than 30 * 10 -1 mm), weighing is used. The mass of a meter of pipe is found by weighing five pieces of 20 cm, which are taken from every hundred kilograms of the batch.

The curvature of the samples is determined by placing them on a slab and applying a steel ruler one meter long. Using templates and probes, the maximum distance from the ruler to the pipe is measured.

Tensile tests are carried out on long products in accordance with GOST 10006, for flattening - in accordance with GOST 8695. Preparation and sampling for chemical studies must comply with GOST 24231.

The tightness of products is tested with air at a pressure of 690 kPa for five seconds in a bath filled with water. In this case, its leakage from the pipe should not be observed. It is also possible, after agreeing with the consumer on the methodology, to perform such checks by non-destructive methods.

Regulatory documents 11383 and 617 regulate all the necessary indicators and characteristics that copper pipes must have. The quality and effectiveness of the use of such communications in many systems determine the wide distribution and popularity of such products.

Copper pipes GOST, characteristics, assortment

GOST R 52318-2005 Round copper pipes for water and gas. Specifications

FOR TECHNICAL REGULATION AND METROLOGY

ROUND COPPER PIPES

FOR WATER AND GAS

Tasks, basic principles and rules for carrying out work on state standardization in Russian Federation GOST R 1.0-92 “State standardization system of the Russian Federation. Basic Provisions” and GOST R 1.2-92 “State Standardization System of the Russian Federation. The procedure for the development of state standards "

About the standard

1 DEVELOPED by the Technical Committee for Standardization TC 106 "Tsvetmetprokat", Research, Design and Design Institute of Alloys and Non-Ferrous Metal Processing "Open joint-stock company"Institute of Tsvetmetobrabotka"

2 INTRODUCED by the Technical Committee for Standardization TC 106 "Tsvetmetprokat"

3 APPROVED AND INTRODUCED BY Order of the Federal Agency for Technical Regulation and Metrology dated March 9, 2005 No. 45-st

4 This standard incorporates certain provisions of the regional standard EN 1057:1996 "Copper and copper alloys - Round seamless copper pipes for water and gas in heating and wastewater treatment plants"

5 INTRODUCED FOR THE FIRST TIME

Information about changes to this standard is published in the index "National Standards", and the text of these changes- in information index "National standards". In case of revision or cancellation of this standard, the relevant information will be published in the information index "National Standards"

Pipes with an outer diameter of not more than 108 mm are suitable for capillary soldering, including hard soldering, or by connecting them by mechanical deformation.

The connection of pipes with an outer diameter of more than 108 mm is preferably carried out by brazing or welding.

1 area of ​​use. 2

3 Terms and definitions. 4

5 Technical requirements. 7

6 Acceptance rules. ten

7 Methods of control and testing. ten

8 Marking, packaging, transportation and storage. 12

9 Manufacturer's Warranties. fourteen

Appendix A Theoretical weight of 1 m of pipe at nominal outer diameter and nominal wall thickness. fourteen

Appendix B Compliance with copper grades according to GOST R 52318-2005 and EN 1057: 1996. fifteen

Appendix B Vickers hardness values. fifteen

Annex D Test for the presence of carbon film. fifteen

Annex E Combustion method for determining the residual carbon content on the inner surface of pipes. sixteen

Annex E Method for eddy current testing of pipes. 20

NATIONAL STANDARD OF THE RUSSIAN FEDERATION

ROUND COPPER PIPES FOR WATER AND GAS

Round copper tubes for water and gas.

1 area of ​​use

This standard applies to seamless copper pipes of circular cross section used in drinking water supply, cold and hot water supply, water (steam) heating, cooling, sewerage, water treatment facilities and gas supply. This standard also applies to pipes intended for pre-insulation.

The standard establishes the assortment, technical requirements, acceptance rules, methods of control and testing, marking, packaging, transportation and storage of pipes.

2 Normative references

This standard uses Normative references to the following standards:

GOST 859-2001 Copper. Stamps

GOST 2768-84 Technical acetone. Specifications

GOST 2991-85 Non-separable plank boxes for loads weighing up to 500 kg. General specifications

GOST 2999-75 Metals and alloys. Vickers hardness method

GOST 3282-74 General purpose low-carbon steel wire. Specifications

GOST 3560-73 Steel packing tape. Specifications

GOST 3728-78 Pipes. Bend test method

GOST 3845-75 Metal pipes. Hydraulic pressure test method

GOST 4461-77 Nitric acid. Specifications

GOST 6507-90 Micrometers. Specifications

GOST 7376-89 Corrugated cardboard. General specifications

GOST 7502-98 Metal measuring tapes. Specifications

GOST 8693-80 (ISO 8494-86) Metal pipes. Airborne test method

GOST 8694-75 Pipes. Release test method

GOST 9557-87 Flat wooden pallet measuring 800 ´ 1200 mm. Specifications

GOST 9717.1-82 Copper. Method spectral analysis on metal standard samples with photoelectric registration of the spectrum

GOST 9717.2-82 Copper. Spectral analysis method for metal standard samples with photographic recording of the spectrum

GOST 9717.3-82 Copper. Spectral Analysis Method Based on Oxide Standards

GOST 10006-80 (ISO 8692-84) Metal pipes. Tensile test method

GOST 10198-91 Wooden boxes for goods weighing St. 200 to 20000 kg. General specifications

GOST 10354-82 Polyethylene film. Specifications

GOST 12082-82 Plank battens for loads weighing up to 500 kg. General specifications

GOST 13938.1-78 Copper. Methods for determining copper

GOST 13938.2-78 Copper. Methods for the determination of sulfur

GOST 13938.3-78 Copper. Phosphorus determination method

GOST 13938.4-78 Copper. Methods for the determination of iron

GOST 13938.5-78 Copper. Methods for the determination of zinc

GOST 13938.6-78 Copper. Nickel determination methods

GOST 13938.7-78 Copper. Lead determination methods

GOST 13938.8-78 Copper. Methods for the determination of tin

GOST 13938.9-78 Copper. Methods for the determination of silver

GOST 13938.10-78 Copper. Methods for the determination of antimony

GOST 13938.11-78 Copper. Arsenic determination method

GOST 13938.12-78 Copper. Bismuth determination methods

GOST 13938.13-93 Copper. Methods for determining oxygen

GOST 13938.15-88 Copper. Methods for the determination of chromium and cadmium

GOST 14192-96 Marking of goods

GOST 15102-75 Universal metal container, closed with a nominal gross weight of 5.0 tons. Specifications

GOST 15846-2002 Products shipped to the Far North and equivalent areas. Packaging, marking, transportation and storage

GOST 21650-76 Means of fastening packaged cargoes in overpacks. General requirements

GOST 22225-76 Universal containers with a gross weight of 0.625 and 1.25 tons. Specifications

GOST 24047-80 Semi-finished products from non-ferrous metals and their alloys. Sampling for Tensile Testing

GOST 24231-80 Non-ferrous metals and alloys. General requirements for the selection and preparation of samples for chemical analysis

GOST 24597-81 Packages of packaged goods. Main parameters and dimensions

GOST 26663-85 Transport packages. Formation using packaging tools. General technical requirements

GOST 26877-91 Steel products. Methods for measuring shape deviations

Note - When using this standard, it is advisable to check the validity of the reference standards according to the index "National Standards", compiled as of January 1 of the current year, and according to the corresponding information indexes published in the current year. If the reference standard is replaced (modified), then when using this standard, you should be guided by the replaced (modified) standard. If the referenced standard is canceled without replacement, the provision in which the reference to it is given applies to the extent that this reference is not affected.

3 Terms and definitions

In this standard, the following terms are used with their respective definitions:

3.1 seamless round pipe: Hollow product, circular in cross section, made of copper, having a uniform wall thickness, which at all stages of manufacture has a continuous circumference, supplied in straight lengths or in coils.

3.2 average diameter: The arithmetic mean of the largest and smallest diameters measured in one cross section perpendicular to the axis of the pipe.

3.3 ovality(deviation from round shape): The difference between the largest and smallest diameters measured in one cross section perpendicular to the axis of the pipe.

3.4 difference in wall thickness(thickness difference, deviation from concentricity): The difference between the largest and smallest wall thickness values ​​measured in one cross section perpendicular to the pipe axis.

3.5 bay: A piece of product wound in a series of continuous turns.

3.5.1 coil of free winding: A bay in which the coils are randomly held close to each other.

3.5.2 bay of layer-by-layer ordered winding: A coil in which the turns are wound in layers parallel to the axis of the coil in such a way that successive turns in each layer go one after the other.

3.5.3 coil of flat spiral winding: A coil in which the product is wound spirally into a disc-shaped layer. Depending on the length of the pipe, this coil may have several layers.

3.6 measured length: A product of a certain length specified in the order, in a straight piece or in a bay.

3.7 residual carbon content: The amount of carbon present in elemental form.

3.8 potential carbon content: The amount of carbon present in the form of organic compounds (oils, fats, acids, alcohols, etc.).

3.9 total carbon content: Sum of residual carbon content and potential carbon content.

3.10 pre-insulation: Insulation applied to the pipe by an industrial method.

4 Assortment

4.1 The geometric dimensions of the pipes are determined by the outer diameter, wall thickness and length.

4.2 The nominal outside diameter and nominal wall thickness shall be as given in Table 1.

Nominal outside diameter

Nominal wall thickness

P - pipe sizes used;

X - allowable pipe sizes.

4.3 The nominal outer diameter of the pipes and the maximum deviations in the outer diameter must correspond to the values ​​\u200b\u200bspecified in table 2.

Nominal outside diameter

Limit deviation on outer diameter

Soft, hard and semi-hard states

From 6.0 to 18.0 incl.

St. 18.0 to 28.0 incl.

St. 28.0 to 54.0 incl.

St. 54.0 to 76.1 incl.

St. 76.1 to 88.9 incl.

St. 88.9 to 108.0 incl.

St. 108.0 to 159.0 incl.

St. 159.0 to 267.0 incl.

* Including ovality (deviation from roundness).

Note - The outside diameter tolerance limits for pipes in the soft state apply only to the average diameter.

4.4 The pipe wall thickness and maximum deviations in wall thickness must correspond to the values ​​specified in Table 3.

Nominal outside diameter

Maximum deviation in wall thickness at nominal wall thickness*

* Including deviation from concentricity.

Note - Concentricity (uniformity of wall thickness) is controlled by limit deviations along the wall thickness.

4.5 The theoretical mass of 1 m of pipes with a nominal outer diameter and nominal wall thickness is given in Appendix A.

4.6 Along the length of the pipe, the measured length is made in segments and in coils. The form of delivery, length and maximum deviations along the length of the pipes are given in table 4.

Nominal outside diameter

Maximum deviation in length

From 6.0 to 22.0 incl.

From 6.0 to 22.0 incl.

From 6.0 to 108.0 incl.

From 1500 to 5000 incl.

From 108.0 to 267.0 incl.

From 1500 to 5000 incl.

Note - It is allowed to supply pipes in coils with a length that is a multiple of 25 m. The maximum deviation along the length of coils of a multiple length is ± 1000 mm.

Symbols of pipes are put down according to the scheme:

In this case, the following abbreviations are used:

manufacturing method: drawn - D;

section shape: round - KR;

condition: soft - M,

dimensions: outer diameter and wall thickness;

length: multiple measured - KD;

delivery form: pieces,

pipe in coils of free winding - BT,

pipe in coils of layer-by-layer ordered winding - BU,

pipe in coils of flat spiral winding - BS.

Examples of pipe symbols:

Drawn pipe, round, soft, outer diameter 8.0 mm, wall thickness 1.0 mm, length 15000 mm, in coils of layer-by-layer ordered winding, made of M1r grade copper:

Pipe DKRM 8.0 ´ 1,0 ´ 15000 coils BU M1r GOST R 52318-2005

Drawn pipe, round, solid, with an outer diameter of 28.0 mm, a wall thickness of 1.5 mm, a length of 5000 mm, in segments, from copper grade M1f:

Pipe DKRT 28.0 ´ 1,5 ´ 5000 pieces M1f GOST R 52318-2005

5 Technical requirements

5.1 Pipes are manufactured in accordance with the requirements of this standard according to the technological regulations approved in the prescribed manner.

5.2 Pipes are made of copper grades M1r, M1f according to GOST 859 with the chemical composition indicated in table 5.

5.3 All materials used to make pipes according to this standard shall be approved by the national health authorities for their intended use.

Table 5 - Chemical composition of copper grades M1r, M1f

Mass fraction of the element

Impurities, no more

Note - Correspondence of copper grades according to this standard and EN 1057: 1996 is given in Appendix B.

5.4 Pipes are manufactured in soft, semi-hard and hard states. The mechanical properties of the pipes must comply with the requirements specified in table 6.

Tensile strength s in, MPa (kgf / mm 2), not less than

Relative elongation d 5 , %, not less than

From 6.0 to 22.0 incl.

From 6.0 to 54.0 incl.

From 6.0 to 267.0 incl.

Note - Vickers hardness values ​​are given in Annex B.

5.5 The outer and inner surfaces of the pipes must be free of contamination, free from deep scratches and traces of drawing, which, during control stripping, would lead the pipes beyond the maximum deviations in size. Pipes should not have cracks and ruptures, leaks and delaminations. The inner surface of the pipes must not contain carbon film. Quantitative and qualitative characteristics for carbon residues on the inner surface of the pipes should not exceed the values ​​for the range and conditions specified in Table 7.

Table 7 - Quantitative and qualitative characteristics for carbon residues

Nominal outer diameter, mm

Potential carbon content, mg/dm 2 , max.

Carbon film test

From 10 to 54 incl.

1 Conduct quantitative analysis the content of carbon residues or the test for the presence of a carbon film is determined by the manufacturer, unless this is specifically stipulated in the terms of delivery.

2 Standards and determination of the content of residual carbon on the inner surface of pipes by the combustion method are introduced from January 1, 2007.

5.6 Pipes supplied in lengths must be equally cut.

The oblique cut of pipes should not exceed the values ​​given in Table 8.

Nominal outside diameter

Oblique cut, no more

From 6.0 to 18.0 incl.

St. 18.0 to 42.0 incl.

St. 42.0 to 76.1 incl.

St. 76.1 to 108.0 incl.

St. 108.0 to 267.0 incl.

5.7 The ovality and wall thickness variation of the pipes should not take their dimensions beyond the maximum deviations in the outer diameter and wall thickness.

Ovality is not set for pipes in a soft state and in bays.

5.8 Pipes supplied in lengths must be straightened. The curvature per 1 m of pipe length must comply with the requirements given in table 9.

Nominal outside diameter

Curvature per 1 m of length, no more

From 12.0 to 54.0 incl.

St. 54.0 to 76.1 incl.

St. 76.1 to 267.0 incl.

The total curvature of the pipe should not exceed the product of curvature per 1 m of length and the total length of the pipe in meters.

Curvature is not set:

- for pipes made in coils;

- for pipes in semi-solid and solid states with an outer diameter of less than 12 mm;

- for pipes in a soft state.

5.9 Pipes shall pass the bend test. The sample is considered to have passed the test if, after bending, no violation of the integrity of the metal in the form of cracks or tears with a metallic sheen visible to the naked eye is found on it.

5.10 Pipes must withstand expansion without the formation of cracks or tears visible to the naked eye, with an increase in the outer diameter of the pipes:

- for a soft state - by 25%;

– for the semi-solid state – by 15%.

5.11 Pipes shall pass the beading test. The sample is considered to have passed the test if, after flanging, it does not have cracks or tears with a metallic sheen visible to the naked eye.

5.12 Tests for bending, expansion and beading depending on the outer diameter and condition of the pipe material are shown in Table 10.

Nominal outer diameter, mm

From 6.0 to 18.0 incl.

St. 18.0 to 54.0 incl.

St. 54.0 to 267.0 incl.

* For a nominal wall thickness of at least 1.0 mm.

Note - In this table, the following designations are used:

M - the test is mandatory;

A - the test is carried out by agreement between the consumer and the manufacturer.

5.13 Pipes must be airtight.

6 Acceptance rules

6.1 Pipes are accepted in batches. The batch must consist of pipes of the same grade of copper, the same size and the same material condition and must be issued with one quality document containing:

- symbol of pipes;

- test results (at the request of the consumer);

The batch weight should not exceed 5000 kg.

6.2 The scope of acceptance tests and the number of controlled pipes are given in Table 11.

Clause number of this standard

Item number of control and test methods

Number of controlled pipes (coils) per batch, pcs.

2 Outer diameter, ovality

wall thickness, thickness variation

5 Chemical composition

6 Mechanical properties

6.3 Upon receipt of unsatisfactory test results when selective control at least one of the indicators for it is re-tested on a double sample taken from the same batch.

Upon receipt of unsatisfactory results of repeated tests, a batch of pipes is rejected.

7 Methods of control and testing

7.1 Inspection of the outer and inner surfaces of pipes, cut surfaces is carried out visually, without the use of magnifying devices. The presence of markings on the pipes is monitored visually.

7.2 Measurement of the outer diameter is carried out with a micrometer according to GOST 6507. Diameter measurement is carried out in sections spaced from the ends of the pipe at a distance not less than the outer diameter, at three points on any section of the pipe.

According to the results of actual measurements, the maximum and minimum values ​​of the diameters in the measured sections are determined and the average outer diameter is determined.

Measurement of the outer diameter of pipes in coils is carried out at the straight ends of the pipes.

At the place of marking, the measurement of the cross-sectional dimensions of the pipes is not carried out.

7.3 To control the quality of the inner surface of pipes with a diameter of up to 28 mm inclusive and pipes manufactured in coils, one sample with a length of at least 150 mm should be taken from each selected pipe (coil). The samples are cut lengthwise into two parts and inspected.

Inspection of the inner surface of pipes with a diameter of more than 28 mm is carried out on an illuminated screen.

To control the presence of a carbon film and the content of carbon residues on the inner surface of pipes with an outer diameter of up to 22 mm, one sample with a length of at least 300 mm and an inner surface area of ​​at least 20 cm 2 should be taken. For pipes with an outer diameter of more than 22 mm and a wall thickness of more than 1 mm, the area of ​​\u200b\u200bthe inner surface of the selected samples must be at least 20 cm 2.

The control of the inner surface of the pipes for the presence of a carbon film is carried out according to the method in accordance with Appendix G.

The determination of the residual carbon content on the inner surface of the pipes is carried out in accordance with Appendix E.

7.4 To control the wall thickness, from each of the controlled pipes with an internal diameter of less than 8 mm, samples are cut off at least 150 mm long, cut them lengthwise into two parts and measured with a micrometer according to GOST 6507.

Measurement of the wall thickness of pipes with an internal diameter of 8 mm or more is carried out on both sides of the pipe (sample) at a distance of at least 5 mm from the ends of the pipe. Based on the results of actual measurements, the maximum and minimum values ​​of the wall thickness in the measured sections and the difference in wall thickness are determined as the difference between the largest and smallest values.

It is allowed to control the diameter and wall thickness of pipes by other measuring instruments that provide the necessary accuracy.

7.5 The length of the pipes in segments is measured with a tape measure in accordance with GOST 7502. The measurement is carried out at least twice from opposite sides of the cylindrical surface of the pipe.

The length of pipes in coils is guaranteed by the manufacturer.

The curvature, the oblique cut is measured in accordance with GOST 26877.

7.6 For tensile or hardness tests, one sample is cut from each selected pipe (coil).

Selection and preparation of samples for tensile testing is carried out in accordance with GOST 24047.

The tensile test is carried out according to GOST 10006.

The Vickers hardness test is carried out according to GOST 2999.

7.7 For the beading test, one sample is cut from each selected pipe.

The beading test is carried out according to GOST 8693.

The flanging must be at least 30% of the inner diameter of the pipe.

7.8 For bend testing, one sample is cut from each selected pipe (coil). The bend test is carried out according to GOST 3728.

The bending angle of the pipe specimen is assumed to be 90°. Pipe bend radius is given in table 12.

Nominal outside diameter

Nominal outside diameter

Pipe bend radius at center line

7.9 For testing for expansion, one sample is cut from each selected pipe (bay). The expansion test is carried out in accordance with GOST 8694. A mandrel with a taper angle of 45 ° is used for testing.

7.10 Each pipe in a batch is subject to a leak test using one of the following methods:

– method of eddy current testing of pipes with a diameter of up to 42 mm inclusive, set out in Appendix E;

- hydraulic pressure of 5 MPa (50 kgf / cm 2) for 10 s according to GOST 3845;

- pneumatic pressure from 0.4 to 0.5 MPa (from 4 to 5 kgf / cm 2) for 5 s in a bath filled with water, without air leakage from the pipe.

The leak test method shall be specified by the manufacturer.

In the event of disagreement in assessing the tightness of pipes, leak tests are carried out with hydraulic pressure.

7.11 To determine the chemical composition, one sample is cut from each selected pipe (coil).

Sampling to determine the chemical composition is carried out according to GOST 24231.

The analysis of the chemical composition is carried out according to GOST 13938.1 - GOST 13938.13, GOST 13938.15, GOST 9717.1 - GOST 9717.3 or other methods that provide the specified accuracy, approved in the prescribed manner.

It is allowed at the manufacturing plant to carry out sampling from molten metal.

In case of disagreement in the assessment of the chemical composition, the analysis is carried out according to GOST 13938.1 - GOST 13938.13, GOST 13938.15.

8 Marking, packaging, transport and storage

8.1 Each pipe with a diameter of 10 to 54 mm inclusive is marked along its entire length with a step between adjacent inscriptions of not more than 600 mm.

For pipes of other sizes, the marking is applied at both ends of the pipe.

The method of marking should ensure its reliable safety during transportation and operation at the consumer's. The marking on the pipe made of copper grades M1r and M1f must contain the following information:

- the designation of this standard;

- nominal dimensions of the cross section (outer diameter, wall thickness);

– grade of copper and condition of the material;

- trademark or name of the manufacturer;

- information about production: year and batch number.

8.2 Marking of the coils must be made on labels glued to the outside of the packaging container, and must contain the symbol of the pipes and the lot number.

8.3 The label attached to each package of pipes shall contain the following information:

- trademark or name and trademark of the manufacturer;

- symbol of pipes;

– lot net weight.

8.4 Transport marking - in accordance with GOST 14192 with the application of the handling sign "Keep away from moisture."

8.5 Pipes in sections and in coils are packed in wooden boxes, the condition of the material and the dimensions of which are indicated in table 13.

Nominal wall thickness

Nominal outside diameter

Semi-hard and hard

The mass of pipes in coils should not exceed 80 kg.

The weight of pipes in coils is more than 80 kg. The minimum and maximum weights of coils can be set by agreement between the consumer and the manufacturer.

Pipes in segments with an outer diameter of not more than 40 mm are tied into bundles weighing not more than 80 kg.

Each bundle and coil of pipes must be tied with a wire with a diameter of at least 1.2 mm or twine made of synthetic materials according to normative document not less than two turns and not less than two places (bay - in three places evenly) in such a way that the mutual movement of pipes is excluded. The ends of the wire are connected by twisting at least five turns.

8.6 Pipes in coils are packed in polyethylene film and placed in wooden boxes on pallets or in corrugated cardboard boxes.

It is allowed, in the absence of transshipment on the way, to transport pipes in covered wagons and containers in bundles without packing in boxes.

Packaging must ensure the safety of pipes.

As containers and packaging materials can be used:

- boxes according to GOST 2991, GOST 10198;

- wooden battens according to GOST 12082;

- containers according to GOST 15102, GOST 22225;

- wire according to GOST 3282;

- tape according to GOST 3560;

– corrugated cardboard according to GOST 7376;

– wooden pallets according to GOST 9557;

- polyethylene film according to GOST 10354.

Other types of packaging and packaging materials are allowed to ensure the safety of pipes during transportation, according to regulatory documents.

8.7 Packing of pipes shipped to the regions of the Far North and areas equivalent to them - in accordance with GOST 15846.

8.8 Consolidation of packages in overpacks is carried out in accordance with the requirements of GOST 26663.

Overall dimensions of packages - in accordance with GOST 24597.

Means of fastening in transport packages - according to GOST 21650.

The maximum allowable weight of a package is 5000 kg.

When transported in covered wagons, the weight of a package must not exceed 1250 kg.

Packing is carried out on pallets according to GOST 9557 or without pallets using bars with a cross section of at least 50 ´ 50 mm with a strapping wire with a diameter of at least 3 mm or a tape with a size of at least 0.3 ´ 30 mm or using bundled slings. The ends of the binding wire are connected by twisting in five turns, the tapes are connected into a lock.

8.9 In each container or in one of the boxes of the container, a packing list must be enclosed, on which the following data must be indicated:

- trademark or name and trademark of the manufacturer;

– legal address of the manufacturer and (or) seller;

- pipe symbol or copper grade, pipe dimensions, material condition, designation of this standard;

– stamp of technical control or number of technical controller;

8.10 Pipes are transported by all means of transport in covered vehicles in accordance with the rules for the carriage of goods in force for this type of transport.

For pipes with a length of more than 2000 mm, vehicles are determined in accordance with the rules for the carriage of goods in force for this type of transport.

8.11 Pipes must be stored indoors and must be protected from mechanical damage, moisture and active chemicals.

If the specified storage conditions are observed, the consumer properties of pipes do not change during storage.

9 Manufacturer's warranties

9.1 The manufacturer guarantees the compliance of pipes with the requirements of this standard, provided that the consumer observes the conditions of transportation and storage.

9.2 Warranty period of storage - 12 months from the date of manufacture.

9.3 After the expiration of the warranty period of storage, pipes must be checked for compliance with the requirements of this standard before use and, if they comply, can be used by the consumer for their intended purpose.

Annex A

Theoretical weight of 1 m pipes at nominal outside diameter and nominal wall thickness

Nominal outer diameter, mm

Theoretical weight of 1 m of pipes, kg, at nominal wall thickness, mm

1 Theoretical mass calculated from nominal outside diameter and nominal wall thickness.

2 The density of copper is assumed to be 8.9 g/cm 3 .

Annex B

Compliance with copper grades according to GOST R 52318-2005 and EN 1057: 1996

GOST R 52318-2005

Annex B

Vickers hardness values

Nominal outer diameter, mm

Vickers hardness, HV 5/3

From 6.0 to 22.0 incl.

From 6.0 to 54.0 incl.

From 6.0 to 267.0 incl.

Annex D

Carbon film test

D.1 Preparation of the specimen for testing

The outer surface of the pipe specimen to be tested shall be clean.

D.1.1 Chemical cleaning method

D.1.1.1 An acid-resistant plug is inserted from one end of the sample pipe.

A pipe sample with a plug is immersed in concentrated nitric acid according to GOST 4461 and kept for at least 30 s, after which the sample is washed with running water, then with distilled water and dried in air.

D.1.1.2 A piece of at least 25 mm in length is cut from the end of the pipe sample with a plug and removed.

D.1.1.3 The remaining sample is cut lengthwise into two parts with a tool free from carbon-containing contaminants and degreased by immersion in acetone according to GOST 2768.

D.1.2 Mechanical cleaning method

D.1.2.1 A thin layer is removed from the outer surface of the sample by processing on lathe without the use of cutting fluid, a tool that is free from carbonaceous contaminants.

After machining, the sample is cut lengthwise into two parts with a tool free from carbonaceous contaminants and degreased by immersion in acetone.

D.2 Testing

D.2.1 The area of ​​the inner surface of the prepared sample must be at least 20 cm 2 .

D.2.2 The defatted sample is placed with the inner surface up in a small flat-bottomed glass or white porcelain dish and poured 25% ( v / v) a solution of nitric acid in such an amount that the sample is completely immersed in the solution, at a temperature environment.

D.2.3 When the acid turns blue, remove the sample and rinse with distilled water, washing away any particles adhering to the sample with the acid.

D.3 Test results

D.3.1 The study of the film formed on the surface of the acid is carried out using a microscope at tenfold magnification.

At the first viewing, it is possible to determine the presence of a film or particles on the surface of the acid solution. If nothing is found or individual rare fine particles are found, the test is passed.

If a floating film is clearly visible on the surface of the acid solution, it may be a film of carbon or carbon monoxide.

To accurately determine chemical composition films - carbon or carbon monoxide, the acid with the film must be brought to a boil and boiled slowly for about 5 minutes until any layers of oxide dissolve.

If the film has disappeared or only rare fine particles remain, the test is passed.

If the film remains unchanged, then it is carbon and therefore fails the test.

Annex D

Combustion method for determining the residual carbon content on the inner surface of pipes

E.1 Basic principle

E.1.1 Combustion of carbon present on the inner surface of pipe samples is carried out at a given temperature, at a given oxygen flow rate. The carbon content includes residual, potential and total carbon content. This method includes the combustion of carbon and three methods for measuring the carbon dioxide (carbon dioxide) generated.

Determine the residual carbon content or total carbon content, or residual and total carbon content.

The potential carbon content is determined by subtracting the residual carbon content from the total carbon content.

E.2 Preparation of specimens for testing

E.2.1 In order to determine the carbon content, the operations are performed, the sequence of which is defined in E.2.1.1, method A or B, and (or) in E.2.1.2.

E.2.1.1 Residual carbon content

- take samples (D.2.2);

- cut samples (D.2.5).

- take samples (D.2.2);

- clean the outer surface of the samples (D.2.4);

- clean the inner surface of the samples (D.2.3);

- cut samples (D.2.5).

E.2.1.2 Total carbon content

- take samples (D.2.2);

- clean the outer surface of the samples (D.2.4);

- cut samples (D.2.5).

E.2.2 Sampling for testing

E.2.2.1 Cut a sample 300 mm long from the pipe.

The cutting tool must be free of dyes, lubricants or other carbonaceous contaminants.

Clean the ends of the samples.

E.2.3 Cleaning the inner surface of the specimen

E.2.3.1 Immerse the specimen in a bath of an analytical organic solvent or a chlorinated hydrocarbon, such as trichlorethylene or trichloroethane, for 5 min at room temperature or 2 min in a boiling solution. In case of disagreement, use trichlorethylene or trichloroethane.

Immerse the specimen for at least 30 s in a second bath of the same solution.

Remove the samples from the bath and place them vertically above the evaporation chamber or in the oven (thermostat) until the solution has completely evaporated. The solution in both baths is periodically updated as it gets dirty.

E.2.4 Cleaning the outer surface of the specimen

E.2.4.1 The outer surface of the pipe specimen to be tested shall be clean.

To clean the outer surface of the sample, a chemical or mechanical method is used.

Use only the chemical cleaning method given in D.2.4.2 to determine the blank correction (D.4.5) and to use it in case of disagreement.

E.2.4.2 Chemical cleaning method

E.2.4.2.1 Insert an acid-resistant plug at one end of the sample pipe.

A pipe sample with a plug is placed in 50% ( v / v) nitric acid solution and keep it for at least 30 s, after which the sample is washed with running water, then with distilled water, and finally immersed for 2–3 minutes in a bath with distilled water at a temperature of at least 80 °C. The sample is removed and air dried. The nitric acid solution is periodically updated.

E.2.4.2.2 Cut a piece at least 25 mm long from the end of the pipe specimen with a plug and remove it. The cleaned sample must not come into contact with hands or carbonaceous matter.

E.2.4.3 Mechanical cleaning method

E.2.4.3.1 A thin layer is removed from the surface of the specimen by turning on a lathe without the use of cutting fluids with a cutting tool free from carbonaceous contamination.

E.2.5 Preparation of specimens for testing

E.2.5.1 Prepare specimens for testing according to D.2.5.2 or D.2.5.3 and store until testing in an uncontaminated environment, for example in a desiccator containing pans of sodium hydroxide.

E.2.5.2 Pipes with diameters not exceeding the furnace diameter

E.2.5.2.1 From the end of a pipe specimen with a plug, cleaned chemical method, cut off a segment of such a length that its inner surface area is at least 20 cm 2.

To achieve a clean cut perpendicular to the axis of the pipe, it is recommended to use a circular saw for cross cutting.

The area of ​​the inner surface of the test specimen is determined by multiplying the mean inner diameter by the length of the specimen, measured to the nearest 0,1 mm.

If the test piece is longer than the glow zone of the combustion device described in D.3 c), cut the sample crosswise into two pieces and place both pieces simultaneously in the glow zone.

E.2.5.3 Pipes with diameters exceeding the furnace diameter

E.2.5.3.1 If the furnace diameter is smaller than the pipe diameter, the following methods should be used:

– Slitting method:

cut off a piece of the sample pipe of such length that the area of ​​its inner surface was not less than 20 cm 2 .

Weigh the piece of sample to the nearest 0.01 g. R o.

Sample inner surface area So determined by multiplying the mean inner diameter by the length of the specimen, measured to the nearest 0.1 mm.

Using a defatted saw blade, cut the specimen lengthwise into two halves. Bend each half of the sample so that it can be placed longitudinally in the oven. The sample halves can be bent using clamping jaws made of aluminum or other aluminum-based materials previously degreased with trichlorethylene or trichloroethane. The materials of which the clamps are made must not contaminate the sample with carbonaceous substances.

Weigh the two halves of the test piece to the nearest 0,01 g. P 1 .

Internal surface area of ​​the test piece S 1 , which must be at least 20 cm 2, calculated by the formula

if a test piece with an internal surface area of ​​at least 20 cm 2 can be obtained by flattening, then the flattening operation is carried out between the clamping jaws of aluminum or other materials based on aluminum, previously degreased with trichloroethylene or trichloroethane.

E.3 Combustion method for products containing carbon

E.3.1 Combustion is carried out in a quartz tube in an oxygen flow with a minimum purity of 99.995%.

The combustion device consists of:

a) Oxygen supply and purification systems, which can guarantee a purity of 99.995%. This system usually includes:

- a refined furnace (primary combustion), including a quartz tube filled with copper oxide, in which the temperature must be maintained from 450 ° C to 500 ° C;

b) holding chambers for the test specimen;

c) a combustion chamber with a quartz tube and a tube furnace (approximately 600 mm long), which must be maintained at a temperature of at least 750 °C.

E.4 Methods for determining the carbon content

E.4.1 There are three main methods for determining carbon content:

– method using tetrabutylammonium hydroxide (D.4.2);

– method for measuring differential electrical conductivity (D.4.3);

– infrared absorption spectrometry method (D.4.4).

Other methods (eg coulometric method) may be used if their sensitivities are not less than those indicated.

In each case, the blank correction shall be determined in accordance with D.4.5.

D.4.2 Tetrabutylammonium hydroxide method

E.4.2.1 The method includes absorption of the generated carbon dioxide (carbon dioxide) with an ethanolamine solution, neutralization of acidity with a standard (methane) solution of tetrabutylammonium hydroxide, and determination of the carbon content.

D.4.3 Method for measuring differential conductivity

E.4.3.1 The method consists in measuring the difference in the electrical conductivity of a sodium hydroxide solution before and after absorption of the generated carbon dioxide (carbon dioxide).

The accuracy of the measurement results is ± 0.02 mg/dm 2 .

D.4.4 Infrared Absorption Spectrometry Method

E.4.4.1 This method consists in the direct determination of the carbon content by automatic analysis absorption of infrared rays produced by carbon dioxide (carbon dioxide).

The device usually includes the combustion mechanism described in section E.3.

Accuracy of measurement results ± 0.01 mg/dm 2 .

E.4.5 Determination of the blank correction

E.4.5.1 The blank correction shall be determined at the beginning or during the test.

The blank correction is expressed in milligrams per square decimeter.

– cut the test specimen to a length such that its internal surface area is not less than 20 cm 2 ;

- completely place the sample in a bath with 50% ( v / v ) with a solution of nitric acid and hold it for at least 30 s so that it is etched both from the inside and from the outside;

- remove the test sample from the bath using tongs and rinse it under running water, then under distilled water and finally lower it for 2-3 minutes into a bath with distilled water at a temperature of at least 80 ° C and dry in air;

– the sample is stored in a desiccator containing trays of sodium hydroxide until measurements are taken.

Determine the area of ​​the inner surface of the sample by multiplying the mean inner diameter by the length of the sample, measured to the nearest 0.1 mm.

The blank correction is the average of two samples.

The blank experiment correction should be no more than 0.02 mg/dm 2 . If large corrections are received, then the cause must be clarified and eliminated.

E.5.1 Whichever method is used, the carbon content should be expressed in milligrams per square decimeter as the arithmetic mean of the two samples.

E.6 Control of accuracy

E.6.1 The apparatus shall be checked at the beginning of the test and thereafter at least once a day in continuous use, using standard samples. If an infrared absorption spectrometer is used, the test may be carried out using carbon monoxide in accordance with the manufacturer's instructions. If an infrared absorption spectrometer is used, the test apparatus shall be checked at least twice a year.

Appendix E

Eddy current pipe testing method

E.1 Purpose and scope

E.1.1 This test method is used to inspect pipes made of non-ferrous metals and alloys in order to detect material discontinuities on the outer and inner surfaces of the pipes and in the thickness of the pipe material.

E.1.2 The method is used to test pipes with an outer diameter of 6 to 42 mm and detect defects in the wall thickness to a depth of 3 mm from the outer surface.

E.2 Applied equipment

E.2.1 For pipe inspection, use:

– a set of feed-through eddy-current transducers of different diameters;

– broach-centering device with a mechanism for automatic sorting or automatic marking of defective zones;

E.2.2 For testing, any type of eddy current flaw detector designed to work with eddy current transducers, providing testing at a frequency of 4 to 30 kHz, operating at an ambient temperature of 5 °C to 50 °C, can be used.

E.2.3 The eddy current transducer is mounted on the broach-centering device in such a way that the pipe is centered relative to the electrical center of the coil of the transducer. An indicator of electrical centering is the independence of the signal intensity from the position of the discontinuity on the circle. The discontinuity can be either natural (on a previously rejected pipe) or artificial.

E.2.3.2 The equipment used for pipe testing should be equipped with a device to suppress the end effect signal.

E.2.4 A broaching-centering device is an electromechanical means of feeding a pipe through a straight-through transducer.

The device must support the tube concentrically with respect to the electrical center of the coil of the feedthrough transducer.

E.2.5 The reference specimen shall have three holes drilled radially through the pipe wall at 0°, 120° and 240°, one in each of the three transverse planes in accordance with Figure E.1.

The holes should be spaced far enough apart so that the flaw detector picks up individual signals from each hole without interference from the ends of the sample.

It is allowed to manufacture and use a reference sample with one hole, which must be passed through the through-through transducer three times with rotation at each subsequent passage of the sample hole by 120 ° relative to its previous position.

Figure E.1 - Reference piece with three holes

E.2.5.1 The reference sample serves to adjust the flaw detector to the minimum control sensitivity, which ensures reliable detection of all three artificial discontinuities present on the sample, and to periodically check the performance of the control means.

E.2.5.2 Drill hole diameters are given in Table E.1.

Nominal outer diameter of controlled pipes

Drill hole diameter

From 6.0 to 28.0 incl.

St. 28.0 to 42.0 incl.

E.2.5.3 Reference samples are made from pipes of the same alloy, condition, size as the tested pipes. The difference between the reference sample and the controlled pipes is allowed only along the wall thickness, but not more than 0.5 mm.

E.3 Preparation for testing

E.3.1 Pipes shall be free from significant grease burns, metal chips, flaking scale and other surface contaminants.

E.3.2 Before starting the inspection, the flaw detector is put into operation and its performance is checked in accordance with the operating instructions and the inspection procedure.

E.3.3 The sensitivity of the flaw detector is adjusted using reference samples. The adjustment of the sensitivity according to the reference sample is considered complete if, when the sample is passed through the flaw detector three or five times in the steady state, one hundred percent registration of artificial defects occurs.

E.3.4 The condition of the reference samples is checked at least once every three months. At the same time, metrological control of the sizes of artificial discontinuities (holes) on the sample is carried out.

E.4 Conducting controls

E.4.1 Pipes are fed one by one into the broach-centering device.

E.4.2 If during the passage of the pipe there is no signal "Rejection", indicating the presence of unacceptable discontinuities in it, then the pipe is considered good. Otherwise, the pipe is rejected.

E.4.3 Control of the adjustment of the eddy current flaw detector should be carried out before each start of work according to E.3.3 and periodically every 2 hours of continuous operation by passing the sample through the installation two or three times.

E.4.4 If violations of the settings or deviations from the requirements described in E.2.2 - E.2.5 of this appendix are detected, the pipe inspection should be stopped until the equipment is restored to normal operation. All pipes that have passed control under the indicated violations of the regime are subjected to a second check.

E.5 Processing of results

E.5.1 Indication of a defective area is carried out by a signal light, which lights up when it passes through the through-through transducer. The unit can operate in automatic mode, ensuring the sorting of inspected pipes into relevant and non-compliant technical requirements. In addition, a recording or marking device can be connected to it.

E.5.2 The results of eddy current testing of pipes are recorded in a log. In this case, the main conditions for testing should be indicated: reference sample, type of installation, scope of testing, operating frequency, size of the transducer.

E.5.3 Log entries serve to statistical analysis pipe monitoring efficiency and condition technological process their production.

GOST R 52318-2005 Round copper pipes for water and gas

General purpose copper pipes are manufactured in accordance with the requirements of the following Russian and international standards:

• GOST 617-2006;
• EN 12449;

Copper alloys can be used in the manufacture of tubes different brands, including M1, M1r, M1L, M1Lr, M2, M2r, Cu-DHP, SF-Cu, etc. Pipes can be manufactured according to individual customer requirements.

Products are produced drawn or pressed. According to the state, drawn pipes can be of 3 types: soft, semi-solid, solid.

It is possible to order non-ferrous metal-roll products in the form of random length segments, multiple length segments or measured length segments.

Scope of copper pipes

Round copper rolled metal has found wide application in various industries. It is also used in everyday life, for example, in water supply systems, heating systems, etc. When installing such systems, copper pipes can be connected different ways, which include:

• soldering with hard or soft solder;
• welding;
• pressing;
• compression connection;
• connection with fittings.

Application of products is possible in conditions of working temperature, which does not exceed +250°C. Also, general purpose copper tubes can be classified according to mechanical properties into the following varieties: R220 (soft), R250 (semi-hard), R290 (hard).

Copper alloys have high corrosion resistance, which makes the use of copper pipes the best solution for installation reliable system supply of air, liquid or gas. Due to the high thermal conductivity that copper pipes have, they can be used for a variety of applications.

Copper pipes are superior in thermal conductivity and service life. They are non-toxic, have antibacterial properties, and therefore are suitable for water supply. Copper withstands temperature extremes, is ductile, does not accumulate deposits on the walls, and does not deform even when frozen.

Fill out an application on the site and get offer for the supply of general purpose copper pipes. We offer delivery from the factory favorable price. The minimum order rate is 300-1000 kg, determined by the diameter and wall thickness of the product.