Steel fittings GOST 3262 weight. Steel pipes for water and gas supply

GOST 7502-98

GOST 8026-92

GOST 8694-75

GOST 8695-75

GOST 8944-75

GOST 8954-75

GOST 8965-75

GOST 8966-75

GOST 10006-80

GOST 10692-80

GOST 11358-89

GOST 18242-72

GOST 18360-93

6. The limitation of the validity period was removed by the Resolution of the State Standard of 12.11.91 N 1726

7. EDITION (May 2007) with Amendments No. 1, 2, 3, 4, 5, 6, approved in November 1977, December 1978, January 1987, May 1988, November 1989. , November 1991 (IUS 1-78, 2-79, 4-87, 8-88, 2-90, 2-92)

This standard applies to non-galvanized and galvanized steel welded pipes with threaded or knurled cylindrical threads and without threads, used for water and gas pipelines, heating systems, as well as for parts of water supply and gas pipelines.

(Modified edition, Rev. N 2, 3, 5).

1. VARIETY

1.1. Pipes are manufactured according to the sizes and weights given in Table 1.

At the request of the consumer pipes light series intended for thread rolling are manufactured according to the dimensions and weight given in table 2.

(Modified edition, Amendments N 1, 3).

1.2. The length of the pipe is made from 4 to 12 m:

measured or multiple measured lengths with an allowance for each cut of 5 mm and a longitudinal deviation for the entire length plus 10 mm;

unmeasured length.

By agreement between the manufacturer and the consumer, in a batch of off-gauge pipes, up to 5% of pipes with a length of 1.5 to 4 m are allowed.

Table 1

Dimensions, mm


Conditional pass	Outside diameter	Pipe wall thickness			Weight of 1 m pipes, kg
		lungs	ordinary	reinforced		ordinary	reinforced

table 2

Dimensions, mm


Conditional pass	Outside diameter	Wall thickness	Weight of 1 m pipes, kg

Notes:

1. For a thread made by the knurling method, on a pipe it is allowed to reduce its inner diameter by up to 10% along the entire length of the thread.

2. The mass of 1 m of pipes is calculated with a steel density equal to 7.85 g / cm. Galvanized pipes are heavier than non-galvanized ones by 3%.

1.3. Limit deviations in pipe dimensions should not exceed those indicated in table 3.

Table 3


Pipe size	Maximum deviation for pipes of manufacturing accuracy
	the usual	increased
Outside diameter with nominal bore:
up to 40 mm incl.	0.4 mm -0,5
over 40 mm
Wall thickness

Notes:

1. The maximum deviation to the plus side in the wall thickness is limited by the maximum deviations in the mass of the pipes.

2. Pipes of normal manufacturing accuracy are used for water pipelines, gas pipelines and heating systems. Pipes of increased manufacturing accuracy are used for parts of water supply and gas supply structures.

1.4. Maximum deviations in pipe weight should not exceed + 8%.

At the request of the consumer, the maximum deviations in weight should not exceed:

+ 7.5% - for the party;

+ 10% - for a separate pipe.

(Modified edition, Rev. N 2, 5).

1.5. The curvature of pipes for 1 m of length should not exceed:

2 mm - with nominal bore up to 20 mm inclusive;

1.5 mm - with a nominal bore over 20 mm.

1.6. The pipe threads can be long or short. Thread requirements should be as specified in Table 4.

Table 4


Nominal bore, mm	Number of threads at conditional passage	Thread length to run, mm
		long	short

1.7. Pipes with a nominal bore of 6, 8, 10,15 and 20 mm are wound into coils at the request of the consumer.

Legend examples

Ordinary pipe, non-galvanized, of normal manufacturing accuracy, off-gauge length, with a nominal bore of 20 mm, wall thickness of 2.8 mm, without thread and without coupling:

Pipe 20x2.8 GOST 3262-75

The same with the clutch:

Pipe M-20x2.8 GOST 3262-75

The same, measured length, with thread:

Pipe P-20x2.8-4000 GOST 3262-75

The same, with zinc coating, unmeasured length, with thread:

Pipe Ts-R-20x2.8 GOST 3262-75

The same, with a zinc coating, measured length, with a thread:

Pipe Ts-R-20x2.8-4000 GOST 3262-75

For pipes for thread rolling, the letter H is indicated in the symbol after the word "pipe".

For pipes with a long thread, the letter D. is indicated in the symbol after the word "pipe".

For pipes of increased manufacturing accuracy, the letter P. is indicated in the symbol after the size of the nominal bore.

(Modified edition, Amendment N 1).

2. TECHNICAL REQUIREMENTS

2.1. Pipes are manufactured in accordance with the requirements of this standard and according to the process regulations, approved in the prescribed manner, from steels in accordance with GOST 380 and GOST 1050 without standardizing mechanical properties and chemical composition.

Pipes for parts of water supply and gas supply structures are made of steel in accordance with GOST 1050.

2.2. At the request of the consumer, the ends of pipes to be welded with a wall thickness of 5 mm or more must be chamfered at an angle of 35 ° -40 ° to the end of the pipe. In this case, an end ring with a width of 1-3 mm should be left.

At the request of the consumer, on ordinary and reinforced pipes with a nominal bore of more than 10 mm, the thread is applied to both ends of the pipe.

2.1, 2.2. (Modified edition, Amendments N 3, 4).

2.3. At the request of the consumer, pipes are completed with couplings made in accordance with GOST 8944, GOST 8954, GOST 8965 and GOST 8966, at the rate of one coupling for each pipe.

(Modified edition, Amendment N 3).

2.4. Cracks, captivity, swelling and sunsets are not allowed on the pipe surface.

No delamination is allowed at the ends of the pipes.

Separate dents, ripples, risks, traces of stripping and other defects caused by the production method are allowed, if they do not remove the wall thickness beyond the minimum dimensions, as well as a layer of scale that does not interfere with inspection.

On pipes made by furnace welding, it is allowed to reduce the outer diameter to 0.5 mm at the seam, if there is a shallow thickening in this place of not more than 1.0 mm along the inner diameter.

(Modified edition, Amendments N 3, 4).

2.5. At the request of the consumer, on pipes with a nominal bore of 20 mm or more, on the inner surface of the pipe seam, the burr must be cut or flattened, while the height of the burr or its traces should not exceed 0.5 mm.

At the request of the consumer, on pipes with a nominal bore of more than 15 mm, made by furnace welding and by the method of hot reduction, a gentle thickening with a height of no more than 0.5 mm is allowed on the inner surface of the pipes in the seam zone.

(Modified edition, Rev. N 2, 3, 4, 5, 6).

2.6. The ends of the pipes must be cut at right angles. The size of the bevel of the butt is allowed not more than 2 °. Burr residues should not exceed 0.5 mm. When removing burrs, the formation of bluntness (rounding) of the ends is allowed. Cutting of pipes in the mill line is allowed.

By agreement between the manufacturer and the consumer, burrs up to 1 mm are allowed on pipes with a nominal bore of 6-25 mm, made by furnace welding.

(Modified edition, Amendments N 4, 6).

2.7. Galvanized pipes must have a continuous zinc coating over the entire surface with a thickness of at least 30 microns. The absence of zinc coating on the ends and threads of the pipes is allowed.

On the surface of galvanized pipes, blistering and foreign inclusions (hard zinc, oxides, sintered charge), peeling of the coating from the base metal are not allowed.

Separate flux spots and traces of pipe gripping by lifting devices, roughness and slight local influx of zinc are allowed.

It is allowed to correct individual non-galvanized sections by 0.5% of the outer surface of the pipe in accordance with GOST 9.307.

(Modified edition, Amendments N 3, 4).

2.8. The pipes must be able to withstand the hydraulic pressure:

2.4 MPa (25 kgf / cm) - ordinary and light pipes;

3.1 MPa (32 kgf / cm) - reinforced pipes.

At the request of the consumer, the pipes must withstand a hydraulic pressure of 4.9 MPa (50 kgf / cm).

2.9. Pipes with a nominal bore up to 40 mm inclusive must withstand the bend test around a mandrel with a radius equal to 2.5 of the outer diameter, and with a nominal bore of 50 mm, on a mandrel with a radius equal to 3.5 of the outer diameter.

At the request of the consumer, pipes must withstand the expansion test:

for pipes with a nominal bore from 15 to 50 mm - not less than 7%;

for pipes with a nominal bore of 65 mm and more - at least 4%.

At the request of the consumer, pipes must withstand the flattening test up to a distance between flattened surfaces equal to 2/3 of the outer diameter of the pipes.

2.8, 2.9. (Modified edition, Rev. N 2, 3, 5).

2.10. At the request of the consumer, the mechanical properties of pipes for parts of water and gas supply structures must comply with GOST 1050.

2.11. The pipe thread must be clean, without flaws and burrs and comply with GOST 6357, accuracy class B.

Pipes with cylindrical threads are used for assembly with seals.

2.10, 2.11. (Modified edition, Amendments N 3, 4).

2.12. In the place of the seam, blackness on the threads is allowed if the decrease in the normal height of the thread profile does not exceed 15%, and at the request of the consumer does not exceed 10%.

Threads with stripped (for cut) or incomplete (for rolled) threads are allowed on the thread, provided that their total length does not exceed 10% of the required thread length, and at the request of the consumer does not exceed 5%.

2.13. It is allowed on the thread to reduce the useful thread length (without runaway) up to 15% compared to that indicated in Table 4, and at the request of the consumer - up to 10%.

2.12, 2.13. (Modified edition, Rev. N 2, 3, 5).

2.14. Threading on galvanized pipes is carried out after galvanizing.

2.15. (Deleted, Amendment No. 3).

2.16. At the request of the consumer, pipe welds are subjected to non-destructive testing.

(Modified edition, Amendment N 5).

3. RULES OF ACCEPTANCE

3.1. Pipes are accepted in batches. The batch must consist of pipes of the same size, of the same steel grade and be accompanied by one quality document in accordance with GOST 10692 with an addition for pipes intended for the manufacture of parts of water supply and gas pipelines from steel in accordance with GOST 1050; chemical composition and the mechanical properties of steel - in accordance with the quality document of the manufacturer of the billet.

Lot weight - no more than 60 tons.

(Modified edition, Amendments N 3, 4).

3.2. The surface, dimensions and curvature are checked for each pipe in the batch.

It is allowed to apply statistical control methods in accordance with GOST 18242 * with a normal level. Control plans are established by agreement between the manufacturer and the consumer.
________________
* In the territory Russian Federation GOST R 50779.71-99 is in effect.

Control of the outer diameter of pipes is carried out at a distance of at least 15 mm from the end of the pipe.

(Modified edition, Amendments N 3, 4, 5).

3.3. To control the parameters of the thread, for testing for expansion, flattening, bending, the height of the inner burr, the remnants of burrs, the right angle and the angle of the chamfer (for pipes with beveled edges), mechanical properties, take no more than 1%, but not less than two pipes from the batch, and for pipes made by continuous furnace welding, two pipes per batch.

(Modified edition, Amendments N 3, 4).

3.4. All pipes are subject to weight control.

(Modified edition, Amendment N 3).

3.5. Each pipe is subjected to a hydraulic pressure test. With 100% quality control of the welded seam by non-destructive methods, it is allowed not to carry out a hydraulic pressure test. At the same time, the ability of the pipes to withstand the test hydraulic pressure is guaranteed.

(Modified edition, Amendment N 6).

3.6. To check the thickness of the zinc coating on the outer surface and in accessible places on the inner surface, two pipes are taken from the batch.

(Modified edition, Amendment N 2).

3.7. Upon receipt of unsatisfactory test results for at least one of the indicators for it, repeated tests are carried out on a doubled sample.

Retest results apply to the entire batch.

4. TEST METHODS

4.1. For quality control, one sample is cut from each selected pipe for each type of test.

The tensile test is carried out in accordance with GOST 10006. Instead of tensile testing, it is allowed to carry out control of mechanical properties by non-destructive methods.

(Modified edition, Amendments N 3, 6).

4.2. Inspection of the pipe surface is carried out visually.

4.3. Hydraulic test carried out in accordance with GOST 3845 with holding under test pressure for at least 5 s.

4.4. The bend test is carried out in accordance with GOST 3728. Galvanized pipes are tested prior to coating.

(Modified edition, Amendment N 3).

4.4a. The expansion test is carried out in accordance with GOST 8694 on a tapered mandrel with a taper angle of 6 °.

Testing on a mandrel with a taper angle of 30 ° is allowed.

(Modified edition, Amendments N 3, 4).

4.4b. Flattening test is carried out according to GOST 8695.

(Modified edition, Amendment N 3).

4.4c. The control of the welded seam is carried out by non-destructive methods in accordance with the normative documentation.

(Introduced additionally, Amendment No. 3).

4.5. The thickness of the zinc coating on the outer surface and in accessible places on the inner surface is controlled in accordance with GOST 9.301 and GOST 9.302, as well as with devices of the MT-41NTs, MTZON or "Impulse" types according to regulatory documents.

4.6. The thread is checked with threaded ring gauges in accordance with GOST 5378 from both ends of the pipe.

The length of the pipes is measured with a tape measure in accordance with GOST 7502. The thread is controlled with gauges in accordance with GOST 2533.

The control of the mass of a batch of pipes is carried out on a scale of no more than 10 tons with a graduation price of no more than 20 kg.

(Modified edition, Rev. N 3, 4, 5, 6).

4.10. The control of the welded seam is carried out by non-destructive methods according to the technical documentation.

(Introduced additionally, Amendment N 4).

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Marking, packaging, transportation and storage are carried out in accordance with GOST 10692 with the addition.

5.1.1. The pipe thread must be protected from mechanical damage and corrosion with a lubricant according to regulatory documents.

Section 5. (Modified edition, Amendment N 3).

Electronic text of the document
prepared by JSC "Kodeks" and verified by:
official publication
M .: Standartinform, 2007

INTERSTATE STANDARD

TECHNICAL CONDITIONS

Official edition

Standardinform

UDC 669.14-462: 006.354

INTERSTATE

Group B62

STANDARD

STEEL WATER AND GAS PIPES

Technical conditions

Water-supply and gas-supply steel pipes. Specifications

ISS 23.040.10 OKP 13 8500, 13 8501

Date of introduction 01.01.77

This standard applies to non-galvanized and galvanized steel welded pipes with threaded or rolled cylindrical threads and without threads used for water and gas pipelines, heating systems, as well as for parts of plumbing and gas pipelines.

(Modified edition, Amendments No. 2, 3, 5).

1. VARIETY

1.1. Pipes are manufactured according to the dimensions and weight given in table. one.

At the request of the consumer, pipes of a light series intended for thread rolling are made according to the dimensions and weight given in table. 2.

(Modified edition, Amendments No. 1, 3).

1.2. The length of the pipe is made from 4 to 12 m:

measured or multiple measured lengths with an allowance for each cut of 5 mm and a longitudinal deviation for the entire length plus 10 mm;

unmeasured length.

By agreement between the manufacturer and the consumer, in a batch of off-gauge pipes, up to 5% of pipes with a length of 1.5 to 4 m are allowed.

Official edition

Reprinting prohibited

Dimensions, mm

Table 1

		Pipe wall thickness			Weight of 1 m pipes, kg

Table 2 Dimensions, mm

Notes:

1. For a thread made by the knurling method, on a pipe it is allowed to reduce its inner diameter by up to 10% along the entire length of the thread.

2. The mass of 1 m of pipes is calculated at a density of steel equal to 7.85 g / cm 3. Galvanized pipes are heavier than non-galvanized ones by 3%.

1.3. Limit deviations in pipe dimensions should not exceed those indicated in table. 3.

Table 3

Notes:

1. The maximum deviation to the plus side in the wall thickness is limited by the maximum deviations in the mass of the pipes.

1.4. Maximum deviations in pipe weight should not exceed +8%.

At the request of the consumer, the maximum deviations in weight should not exceed:

7.5% - for the party;

10% - for a separate pipe.

(Changed edition, Amendments No. 2, 5).

1.5. The curvature of pipes for 1 m of length should not exceed:

2 mm - with nominal bore up to 20 mm inclusive;

1.5 mm - with a nominal bore over 20 mm.

1.6. The pipe threads can be long or short. The requirements for the thread must correspond to those indicated in table. 4.

Table 4

Nominal bore, mm	Thread length to run, mm		Nominal bore, mm	Number of threads at conditional passage	Thread length to run, mm
Nominal bore, mm		short	Nominal bore, mm	Number of threads at conditional passage		short

Pipes with a nominal bore of 6, 8, 10, 15 and 20 mm, at the request of the consumer, are coiled into Examples of symbols

Ordinary pipe, non-galvanized, of normal manufacturing accuracy, off-gauge length, with a nominal bore of 20 mm, wall thickness of 2.8 mm, without thread and without coupling:

Pipe 20x2.8 GOST 3262- 75

The same with the clutch:

Pipe M-20 x 2.8 GOST 3262-75 The same, measured length, with thread:

Pipe Р-20х 2.8-4000 GOST 3262-75 The same, with a zinc coating, unmeasured length, with a thread:

Pipe Ts-R-20x 2.8 GOST 3262-75 The same, with a zinc coating, measured length, with a thread:

Pipe Ts-R-20x 2.8-4000 GOST3262-75

For pipes for thread rolling, the letter H is indicated in the symbol after the word "pipe".

For pipes with a long thread, in the symbol after the word "pipe", the letter D. is indicated. For pipes of increased manufacturing accuracy, the letter P. is indicated in the symbol after the size of the nominal passage.

(Modified edition, Amendment No. 1).

2. TECHNICAL REQUIREMENTS

Pipes for parts of water supply and gas supply structures are made of steel in accordance with GOST 1050.

At the request of the consumer, on ordinary and reinforced pipes with a nominal bore of more than 10 mm, the thread is applied to both ends of the pipe.

2.1, 2.2. (Modified edition, Amendments No. 3, 4).

2.3. At the request of the consumer, pipes are completed with couplings made in accordance with GOST 8944, GOST 8954, GOST 8965 and GOST 8966, at the rate of one coupling for each pipe.

(Modified edition, Amendment No. 3).

2.4. Cracks, captivity, swelling and sunsets are not allowed on the pipe surface.

No delamination is allowed at the ends of the pipes.

Separate dents, ripples, risks, traces of stripping and other defects caused by the production method are allowed, if they do not remove the wall thickness beyond the minimum dimensions, as well as a layer of scale that does not interfere with inspection.

On pipes made by furnace welding, it is allowed to reduce the outer diameter to 0.5 mm at the seam, if there is a shallow thickening in this place of not more than 1.0 mm along the inner diameter.

(Modified edition, Amendments No. 3, 4).

At the request of the consumer, on pipes with a nominal bore of more than 15 mm, made by furnace welding and by the method of hot reduction, a gentle thickening with a height of no more than 0.5 mm is allowed on the inner surface of the pipes in the seam zone.

(Modified edition, Amendments No. 2, 3, 4, 5, 6).

By agreement between the manufacturer and the consumer, burrs up to 1 mm are allowed on pipes with a nominal bore of 6-25 mm, made by furnace welding.

(Modified edition, Amendments No. 4, 6).

2.7. Galvanized pipes must have a continuous zinc coating over the entire surface with a thickness of at least 30 microns. The absence of zinc coating on the ends and threads of the pipes is allowed.

On the surface of galvanized pipes, blistering and foreign inclusions (hard zinc, oxides, sintered charge), peeling of the coating from the base metal are not allowed.

Separate flux spots and traces of pipe gripping by lifting devices, roughness and slight local influx of zinc are allowed.

It is allowed to correct individual non-galvanized sections by 0.5% of the outer surface of the pipe in accordance with GOST 9.307.

(Modified edition, Amendments No. 3, 4).

2.8. The pipes must be able to withstand the hydraulic pressure:

2.4 MPa (25 kgf / cm 2) - ordinary and light pipes;

3.1 MPa (32 kgf / cm 2) - reinforced pipes.

At the request of the consumer, the pipes must withstand a hydraulic pressure of 4.9 MPa (50 kgf / cm 2).

At the request of the consumer, pipes must withstand the expansion test:

for pipes with a nominal bore from 15 to 50 mm - not less than 7%;

for pipes with a nominal bore of 65 mm and more - at least 4%.

At the request of the consumer, pipes must withstand the flattening test up to a distance between flattened surfaces equal to 2/3 of the outer diameter of the pipes.

2.8, 2.9. (Modified edition, Amendments No. 2, 3, 5).

2.10. At the request of the consumer, the mechanical properties of pipes for parts of water and gas supply structures must comply with GOST 1050.

2.11. The pipe thread must be clean, without flaws and burrs and comply with GOST 6357, accuracy class B.

Pipes with cylindrical threads are used for assembly with seals.

2.10, 2.11. (Modified edition, Amendments No. 3, 4).

Threads with stripped (for cut) or incomplete (for rolled) threads are allowed on the thread, provided that their total length does not exceed 10% of the required thread length, and at the request of the consumer does not exceed 5%.

2.13. Allowed on the thread to reduce the useful length of the thread (without runaway) up to 15% compared to that indicated in table. 4, and at the request of the consumer - up to 10%.

2.12, 2.13. (Modified edition, Amendments No. 2, 3, 5).

2.14. Threading on galvanized pipes is carried out after galvanizing.

2.15. (Deleted, Amendment No. 3).

2.16. At the request of the consumer, pipe welds are subjected to non-destructive testing.

(Modified edition, Amendment No. 5).

3. RULES OF ACCEPTANCE

3.1. Pipes are accepted in batches. The batch must consist of pipes of the same size, of the same steel grade and be accompanied by one quality document in accordance with GOST 10692 with an addition for pipes intended for the manufacture of parts of water supply and gas pipelines from steel in accordance with GOST 1050; chemical composition and mechanical properties of steel - in accordance with the quality document of the manufacturer of the workpiece.

Lot weight - no more than 60 tons.

(Modified edition, Amendments No. 3, 4).

3.2. The surface, dimensions and curvature are checked for each pipe in the batch.

It is allowed to apply statistical control methods in accordance with GOST 18242 * with a normal level. Control plans are established by agreement between the manufacturer and the consumer.

Control of the outer diameter of pipes is carried out at a distance of at least 15 mm from the end of the pipe.

(Modified edition, Amendments No. 3, 4, 5).

(Modified edition, Amendments No. 3, 4).

3.4. All pipes are subject to weight control.

(Modified edition, Amendment No. 3).

(Modified edition, Amendment No. 6).

3.6. To check the thickness of the zinc coating on the outer surface and in accessible places on the inner surface, two pipes are taken from the batch.

(Modified edition, Amendment No. 2).

3.7. Upon receipt of unsatisfactory test results for at least one of the indicators for it, repeated tests are carried out on a doubled sample.

Retest results apply to the entire batch.

4. TEST METHODS

4.1. For quality control, one sample is cut from each selected pipe for each type of test.

Tensile testing is carried out in accordance with GOST 10006. Instead of tensile testing, it is allowed to carry out control of mechanical properties by non-destructive methods.

4.2. Inspection of the pipe surface is carried out visually.

4.3. The hydraulic test is carried out in accordance with GOST 3845 with holding under test pressure for at least 5 s.

4.4. The bend test is carried out in accordance with GOST 3728. Galvanized pipes are tested before coating.

(Modified edition, Amendment No. 3).

4.4a. The expansion test is carried out in accordance with GOST 8694 on a tapered mandrel with a taper angle of 6 °.

Testing on a mandrel with a taper angle of 30 ° is allowed.

(Modified edition, Amendments No. 3, 4).

GOST R 50779.71-99 is in force on the territory of the Russian Federation.

4.46. Flattening test is carried out according to GOST 8695.

(Modified edition, Amendment No. 3).

4.4c. The control of the welded seam is carried out by non-destructive methods in accordance with the normative documentation.

(Introduced additionally, Amendment No. 3).

4.5. The thickness of the zinc coating on the outer surface and in accessible places on the inner surface is controlled in accordance with GOST 9.301 and GOST 9.302, as well as with devices of the MT-41NTs, MTZON type or the "Impulse" type according to regulatory documents.

4.6. The thread is checked with threaded ring gauges in accordance with GOST 2533 (third class of accuracy).

In this case, the screwing capacity of the no-through ring gauge on the thread should be no more than three turns.

(Modified edition, Amendments No. 3, 4).

4.7. The curvature of the pipes is controlled with a straight edge according to GOST 8026 and a set of probes according to ID.

(Modified edition, Amendments No. 3, 5).

4.8. The right angle of the pipe ends is controlled with a 90 ° square with a size of 160 x 100 mm of class 3 in accordance with GOST 3749, plate probes set 4 in accordance with ID or a goniometer in accordance with GOST 5378. The bevel angle of the chamfer is controlled with a goniometer in accordance with GOST 5378.

(Modified edition, Amendments No. 3, 6).

4.9. Outside diameter control is carried out with smooth micrometers in accordance with GOST 6507, with staple calibers in accordance with GOST 2216 or GOST 18360.

The wall thickness, the height of the inner burr and the height of the burrs are measured with a micrometer in accordance with GOST 6507 or a wall gauge in accordance with GOST 11358 from both ends of the pipe.

The length of the pipes is measured with a tape measure in accordance with GOST 7502. The thread is controlled with gauges in accordance with GOST 2533.

The control of the mass of a batch of pipes is carried out on a scale of no more than Utah with a division price of no more than 20 kg.

(Changed edition, Amendments No. 3, 4, 5, 6).

4.10. The control of the welded seam is carried out by non-destructive methods according to the technical documentation.

(Introduced additionally, Amendment No. 4).

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Marking, packaging, transportation and storage are carried out in accordance with GOST 10692 with the addition.

5.1.1. The pipe thread must be protected from mechanical damage and corrosion with a lubricant according to regulatory documents.

Sec. 5. (Modified edition, Amendment No. 3).

INFORMATION DATA

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

IN AND. Shavings, Cand. tech. sciences; V.M. Crow, Cand. tech. sciences; Yu.M. Mironov, Cand. tech. sciences; A.I. Postolova

2. APPROVED AND INTRODUCED INTO EFFECT by the Decree of the USSR State Committee for Standards dated 09/11/75 No. 2379

3. Inspection frequency - 5 years

4. REPLACE GOST 3262-62

5. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

	Item number		Item number
GOST 9.301-86		GOST 7502-98
GOST 9.302-88		GOST 8026-92
GOST 9.307-89		GOST 8694-75
		GOST 8695-75
GOST 1050-88		GOST 8944-75
GOST 2216-84		GOST 8954-75
GOST 2533-88		GOST 8965-75
GOST 3728-78		GOST 8966-75
GOST 3749-77		GOST 10006-80
GOST 3845-75		GOST 10692-80
GOST 5378-88		GOST 11358-89
GOST 6357-81		GOST 18242-72
GOST 6507-90		GOST 18360-93

6. The limitation of the validity period was lifted by the Decree of the State Standard of the USSR of 12.11.91 No. 1726

7. EDITION (May 2007) with Amendments No. 1, 2, 3, 4, 5, 6, approved in November 1977, December 1978, January 1987, May 1988, November 1989. , November 1991 (NUS 1-78, 2-79, 4-87, 8-88, 2-90, 2-92)

Editor L. I. Nakhimova Technical editor O. N. Vlasova Proofreader A. S. Chernousova Computer layout I.А. Naleykina

Put in the set 05/14/2007. Signed for printing on 05.06.2007. Format 60 x 84 Vs - Offset paper. Times headset. Offset printing. Uel. print l. 0.93. Uch.-ed. l. 0.80. Circulation 126 copies. Zach. 421.C 4031.

FSUE "STANDARTINFORM", 123995 Moscow, Granatny per., 4. Typed in FSUE "STANDARTINFORM" on a PC

Printed at the branch of FSUE STANDARTINFORM - type. "Moscow printer", 105062 Moscow, Lyalin per., 6

1. VARIETY

1.1. Pipes are manufactured according to the dimensions and weight given in table. one.

At the request of the consumer, pipes of a light series intended for thread rolling are made according to the dimensions and weight given in table. 2.

1.2. The length of the pipe is made from 4 to 12 m:

a) measured or multiple measured lengths with an allowance for each cut of 5 mm and a maximum deviation for the entire length plus 10 mm;

b) unmeasured length.

By agreement between the manufacturer and the consumer, in a batch of off-gauge pipes, up to 5% of pipes with a length of 1.5 to 4 m are allowed.

Table 1

Conditional pass	Outside diameter	Pipe wall thickness			Weight of 1 m pipes, kg
			ordinary	reinforced		ordinary	reinforced

table 2

Conditional pass	Outside diameter	Wall thickness	Weight of 1 m pipes, kg

Notes:

1. For a thread made by the knurling method, on a pipe it is allowed to reduce its inner diameter by up to 10% along the entire length of the thread.

2. The mass of 1 m of pipes is calculated at a density of steel equal to 7.85 g / cm 3. Galvanized pipes are heavier than non-galvanized ones by 3%.

(Modified edition, Amendments No. 1, 3)

1.3. Limit deviations in pipe dimensions should not exceed those indicated in table. 3.

Table 3

Pipe dimensions	Limit deviations for pipes of manufacturing accuracy
		increased
Outside diameter with conventional bore:
up to 40 mm incl.

Over 40 mm

Wall thickness

Notes:

1. The maximum deviation to the plus side in the wall thickness is limited by the maximum deviations in the mass of the pipes.

1.4. Maximum deviations in pipe weight should not exceed + 8%.

At the request of the consumer, the maximum deviations in weight should not exceed:

7.5% - for the party;

10% - for a separate pipe.

(Changed edition, Amendments No. 2, 5).

1.5. The curvature of pipes for 1 m of length should not exceed:

2 mm - with nominal bore up to 20 mm inclusive;

1.5 mm - with a nominal bore over 20 mm.

1.6. The pipe threads can be long or short. The requirements for the thread must correspond to those indicated in table. 4.

Table 4

Nominal bore, mm	Thread length before running away		Nominal bore, mm	Number of no-current at nominal size	Thread length before running away
		short				short

1.7. Pipes with a nominal bore of 6, 8, 10, 15 and 20 mm are wound into coils at the request of the consumer.

Examples of symbols.

Ordinary pipe, non-galvanized, of normal manufacturing accuracy, off-gauge length, with a nominal bore of 20 mm, wall thickness of 2.8 mm, without thread and without coupling:

Pipe 202.8 GOST 3262-75

The same with the clutch:

Pipe M-202.8 GOST 3262-75

The same, measured length, with thread:

Pipe R-202.8 - 4000 GOST 3262-75

The same, with zinc coating, unmeasured length, with thread:

Pipe Ts-R-202.8 GOST 3262-75

The same, with a zinc coating, measured length, with a thread:

Pipe Ts-R-202.8 - 4000 GOST 3262-75

For pipes for thread rolling, the letter H is indicated in the symbol after the word "pipe".

For pipes with a long thread, the letter D. is indicated in the symbol after the word "pipe".

For pipes of increased manufacturing accuracy, the letter P. is indicated in the symbol after the size of the nominal bore.

(Modified edition, Amendment No. 1).

2. TECHNICAL REQUIREMENTS

2.1. Pipes are manufactured in accordance with the requirements of this standard and according to the technological regulations, approved in the prescribed manner, from steels in accordance with GOST 380-88 and GOST 1050-88 without standardizing mechanical properties and chemical composition.

Pipes for parts of water supply and gas supply structures are made of steel in accordance with GOST 1050-88.

2.2. At the request of the consumer, at the ends of pipes to be welded, with a wall thickness of 5 mm or more, chamfers must be made at an angle of 35-40 ° to the end of the pipe. In this case, an end ring with a width of 1 - 3 mm should be left.

At the request of the consumer, on ordinary and reinforced pipes with a nominal bore of more than 10 mm, the thread is applied to both ends of the pipe.

2.1; 2.2. (Modified edition, Amendments No. 3, 4).

2.3. At the request of the consumer, pipes are completed with couplings made in accordance with GOST 8944-75, GOST 8954-75, GOST 8965-75 and GOST 8966-75 at the rate of one coupling for each pipe.

(Modified edition, Amendment No. 3).

2.4. Cracks, captivity, swelling and sunsets are not allowed on the pipe surface.

No delamination is allowed at the ends of the pipes.

On pipes made by furnace welding, it is allowed to reduce the outer diameter to 0.5 mm at the seam, if there is a shallow thickening in this place of not more than 1.0 mm along the inner diameter.

(Modified edition, Amendments No. 3, 4).

(Modified edition, Amendments No. 2, 3, 4, 5, 6).

By agreement between the manufacturer and the consumer, burrs up to 1 mm are allowed on pipes with a nominal bore of 6-25 mm, made by furnace welding.

(Modified edition, Amendments No. 4, 6).

2.7. Galvanized pipes must have a continuous zinc coating over the entire surface with a thickness of at least 30 microns. The absence of zinc coating on the ends and threads of the pipes is allowed.

On the surface of galvanized pipes, blistering and foreign inclusions (hard zinc, oxides, sintered charge), peeling of the coating from the base metal are not allowed.

Separate flux spots and traces of pipe gripping by lifting devices, roughness and slight local influx of zinc are allowed.

It is allowed to correct individual non-galvanized sections by 0.5% of the outer surface of the pipe in accordance with GOST 9.307-89.

(Modified edition, Amendments No. 3, 4).

2.8. The pipes must be able to withstand the hydraulic pressure:

2.4 MPa (25 kgf / cm 2) - pipes, ordinary and light;

3.1 MPa (32 kgf / cm 2) - reinforced pipes.

At the request of the consumer, pipes must withstand a hydraulic pressure of 4.9 MPa (50 kgf / cm 2)

(Modified edition, Amendments No. 2, 3, 5).

At the request of the consumer, pipes must withstand the expansion test:

for pipes with nominal bore from 15 to 50 mm - not less than 7%;
for pipes with a nominal bore of 65 and more - at least 4%.

At the request of the consumer, pipes must withstand the flattening test up to a distance between flattened surfaces equal to 2/3 of the outer diameter of the pipes.

(Modified edition, Amendments No. 2, 3, 5).

2.10. At the request of the consumer, the mechanical properties of pipes for parts of water and gas pipelines must comply with GOST 1050-88.

2.11. The pipe thread must be clean, without flaws and burrs and comply with GOST 6357-81, accuracy class B.

Pipes with cylindrical threads are used for assembly with seals.

2.10; 2.11. (Modified edition, Amendments No. 3, 4).

(Modified edition, Amendments No. 2, 3, 5).

2.13. Allowed on the thread to reduce the useful length of the thread (without runaway) up to 15% compared to that indicated in table. 4, and at the request of the consumer up to 10%.

(Modified edition, Amendments No. 2, 3, 5).

2.14. Threading on galvanized pipes is carried out after galvanizing.

2.15. (Deleted, Amendment No. 3).

2.16. At the request of the consumer, pipe welds are subjected to non-destructive testing.

(Modified edition, Amendment No. 5).

3. RULES OF ACCEPTANCE

3.1. Pipes are accepted in batches. A batch must consist of pipes of the same size, of the same brand and be accompanied by one quality document in accordance with GOST 10692-80 with an addition for pipes intended for the manufacture of parts of water supply and gas pipelines, made of steel in accordance with GOST 1050-88: chemical composition and mechanical properties of steel in accordance with the document on the quality of the manufacturer of the workpiece.

The mass of the batch is not more than 60 tons.

(Modified edition, Amendments No. 3, 4).

3.2. The surface, dimensions and curvature are checked for each pipe in the batch.

It is allowed to apply statistical control methods in accordance with GOST 18242-72 with a normal level. Control plans are established by agreement between the manufacturer and the consumer.

Control of the outer diameter of pipes is carried out at a distance of at least 15 mm from the end of the pipe.

(Modified edition, Amendments No. 3, 4, 5).

(Modified edition, Amendments No. 3, 4).

3.4. All pipes are subject to weight control.

(Modified edition, Amendment No. 3).

(Modified edition, Amendment No. 6).

3.6. To check the thickness of the zinc coating on the outer surface and in accessible places on the inner surface, two pipes are taken from the batch.

(Modified edition, Amendment No. 2).

3.7. Upon receipt of unsatisfactory test results for at least one of the indicators for it, a repeated test is carried out on a doubled sample.

Retest results apply to the entire batch.

4. TEST METHODS

4.1. For quality control, one sample is cut from each selected pipe for each type of test.

The tensile test is carried out in accordance with GOST 10006-80. Instead of tensile testing, it is allowed to carry out control of mechanical properties by non-destructive methods.

4.2. Inspection of the pipe surface is carried out visually.

4.3. The hydraulic test is carried out in accordance with GOST 3845-75 with holding under test pressure for at least 5 s.

4.4. The bend test is carried out in accordance with GOST 3728-78. Galvanized pipes are tested prior to coating.

(Modified edition, Amendment No. 3).

4.4a. The expansion test is carried out in accordance with GOST 8694-75 on a tapered mandrel with a taper angle of 6 °.

Testing on a mandrel with a taper angle of 30 ° is allowed.

(Modified edition, Amendments No. 3, 4).

4.4b. Flattening test is carried out according to GOST 8695-75.

(Modified edition, Amendment No. 3).

4.4c. The control of the welded seam is carried out by non-destructive methods according to the normative and technical documentation.

(Introduced additionally, Amendment No. 3).

4.5. The thickness of the zinc coating on the outer surface and in accessible places on the inner surface is controlled in accordance with GOST 9.301-86 and GOST 9.302-88, as well as with devices of the MT-41NTs, MTZON or Impulse type according to the normative and technical documentation.

4.6. The thread is checked with threaded ring gauges in accordance with GOST 2533-88 (third class of accuracy).

In this case, the screwing capacity of the no-through ring gauge on the thread should be no more than three turns.

(Modified edition, Amendments No. 3, 4).

4.7. The curvature of the pipes is controlled with a straight edge in accordance with GOST 8026-92 and a set of probes in accordance with TU 2-034-225-87.

(Modified edition, Amendments No. 3, 5).

4.8. The right angle of the pipe ends is controlled with a 90 ° square with a size of 160x100 mm, class 3 GOST 3749-77, plate probes set 4 TU 2-034-225-87 or a goniometer GOST 5378-88. The bevel angle of the chamfer is controlled by a goniometer in accordance with GOST 5378-88.

(Modified edition, Amendments No. 3, 6).

4.9. Outside diameter control is carried out with smooth micrometers in accordance with GOST 6507-90, calibers-staples in accordance with GOST 2216-84 or GOST 18360-93.

The wall thickness, the height of the inner burr and the height of the burrs are measured with a micrometer in accordance with GOST 6507-90 or a wall gauge in accordance with GOST 11358-89 from both ends of the pipe.

The length of the pipes is measured with a tape measure in accordance with GOST 7502-98. The thread is controlled with gauges in accordance with GOST 2533-88.

The control of the mass of a batch of pipes is carried out on a scale of no more than 10 tons with a graduation price of no more than 20 kg.

(Changed edition, Amendments No. 3, 4, 5, 6).

4.10. The control of the welded seam is carried out by non-destructive methods according to the technical documentation.

(Introduced additionally, Amendment No. 4).

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Marking, packaging, transportation and storage are carried out in accordance with GOST 10692-80 with the addition.

5.1.1. The pipe thread must be protected from mechanical damage and corrosion with a lubricant according to the normative and technical documentation.

Sec. 5. (Modified edition, Amendment No. 3).

INFORMATION DATA

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

DEVELOPERS

V. I. Struzhok, Cand. tech. Sciences, V. M. Vorona, Cand. tech. Sciences, Yu. M. Mironov, Cand. tech. Nuk, A.I. Postolova

2. APPROVED AND INTRODUCED INTO EFFECT by the Decree of the USSR State Committee for Standards dated 09/11/75 No. 2379

3. Inspection frequency 5 years

4. REPLACE GOST 3262-62

5. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

	Item number
GOST 9.301-86
GOST 9.302-88
GOST 9.307-89

GOST 1050-88
GOST 2216-84
GOST 2533-88
GOST 3728-78
GOST 3749-77
GOST 3845-75
GOST 5378-88
GOST 6357-81
GOST 6507-90
GOST 7502-98
GOST 8026-92
GOST 8694-75
GOST 8695-75
GOST 8944-75
GOST 8954-75
GOST 8965-75
GOST 8966-75
GOST 10006-80
GOST 10692-80
GOST 11358-89
GOST 18242-72
GOST 18360-93
TU 2-034-225-88

6. Reprinted (May 1994) with Amendments No. 1, 2, 3, 4, 5, 6, approved in November 1977, December 1978, January 1987, May 1988, November 1989. , November 1991 (IUS 1-78, 2-79, 4-87, 8-88, 2-90, 2-92)

GOST 3262-75 is a regulatory document in accordance with which steel water and gas pipes are produced. With the help of such pipes, which, unlike plastic products, can be successfully operated in open areas, they install pipelines for transporting liquid and gaseous media. Such steel pipes are practically irreplaceable in the field of capital and private construction, housing and communal services, and agriculture.

Steel pipes VGP

General information about steel pipes VGP

Water and gas supply steel pipes, the parameters of which are determined by GOST 3262-75, are classified as special purpose products, as their name suggests. The differences in their types are primarily in the mode of production. However, whatever type the steel pipes of the category under consideration belong to, all their parameters are stipulated by the provisions of such a document as GOST 3262 (75, 80, 85, 91).

So, according to this standard (3262-75, the latest edition of the 91st year), welded water and gas pipes can belong to one of the following types:

non-galvanized;
galvanized;
originally made with threaded ends, which can be obtained by cutting or knurling;
without thread.

Each type of steel pipes is produced according to a specific technology.

Applications and individual parameters

The main areas of application of water and gas pipes, the geometric parameters and technical characteristics of which comply with the 3262-75 standard, are construction and repair. Pipes of this category are used to equip gas and water supply lines and heating systems in cottages and multi-apartment buildings, office buildings, educational institutions, agricultural, industrial and any other facilities.

So, this type of rolled metal is used in:

cold and hot water supply communications;
heating systems;
gas pipeline networks.

GOST 3262 (75, 80, 85, 91) assumes that welded VGP pipes can be produced in measured, multiple measured and unmeasured lengths. So, according to this gradation, they have the following dimensions (along the length of the manufactured products):

dimensional - from 4 to 12 m long;
having a length that is a multiple of the measured value;
unmeasured with a length within the measured value.

The standard length of pipes produced in accordance with GOST is limited to 12 meters

The wall size is the criterion by which water and gas pipes are distinguished:

Reinforced VGP pipes are products (sometimes galvanized), the wall thickness of which is increased (accordingly, such products have more weight). They are used for the installation of pipelines through which liquid or gaseous media are transported under high pressure.

If the technical characteristics and basic geometric parameters of water and gas pipes are regulated by a regulatory document, then their option structural performance and the length of the cut is determined by the customer. So, the most popular are pipes, at the ends of which thread is cut during the production process. The reason for their high popularity is that no welding operations are required for their installation.

The use of pipes with finished threads significantly reduces the time required for the installation of communications

Threads on VGP pipes can be created during their production:

knurling (a technology that makes it possible to obtain threads with the most accurate parameters, while it is assumed that the inner diameter of the pipe will be 10% less);
slicing.

Threads on VGP pipes, at the request of the customer, are cut or rolled, and it can be either short or long.

When calculating the mass of water and gas pipes, it should be borne in mind that galvanized products weigh 3% more than those made of ferrous metal. The standard also imposes a limitation on deviations in batch weight: they should not exceed 8%.

Technical requirements

An assortment is formed from pipes of each type, which lists their geometric parameters and theoretical weight.

Pipes are manufactured by size and weight

The steel from which pipes of the VGP category are made must also comply with the requirements specified in GOST (380, 1050), while the mechanical properties, as well as the chemical composition of the material of manufacture, are not standardized. For each type of pipe (welded, made of ferrous metal, galvanized, threaded) special technical requirements, which should be discussed in more detail.

In accordance with the provisions of GOST, the following requirements are imposed on pipes of the VGP category of welded type.

If tubular products are joined using the furnace welding technology, then in the area of the welded seam their outer diameter can be reduced by half a millimeter. If there is a gentle thickening on the inside of the seam, its size should not exceed 1 mm.
If by means of welding it is necessary to connect water and gas pipes, the wall thickness of which is more than 5 mm, then at their ends they must be chamfered at an angle of 35-40 degrees. In this case, the width of the end ring after chamfering should be in the range of 1-3 mm.
On the inside of the weld seam of water and gas pipes, the diameter of which exceeds 20 mm, excess metal must be cut or flattened so that its height does not exceed half a millimeter.
The customer can additionally stipulate the characteristics of products with an internal bore diameter of over 15 mm, produced using the hot reduction (drawing) technology and joined by the furnace welding method. According to such requirements, on the inside of the weld seam, there may be a gently sloping thickening, the height of which is no more than 0.5 mm.

Straight seam welded pipes are produced by folding the sheet and subsequent welding of the side edges

Water and gas pipes, the threads at the ends of which are cut or rolled by the manufacturer, must have the following parameters.

The thread formed at the ends of the water and gas pipes at the factory must correspond to the accuracy category "B". Its characteristics are stipulated by the provisions of GOST 6357. So, the thread must be clean, there can be no flaws or burrs on it.
At the joints, on the threads, the presence of blackness is possible, while the height of the thread profile in such places should not be reduced by more than 15%. The customer has the right to set more stringent requirements, according to which the limit for reducing the height of the thread profile can be reduced to 10%.
The useful thread length (specified in the assortment and measured without runaway) can be reduced to 15%, but the customer has the right to reduce the value of this deviation to 10%.

Thread requirements according to GOST

The zinc layer, which is applied to the entire surface of the water and gas pipe at the factory, must have a thickness of at least 30 microns. At the same time, it is assumed that zinc coating may be absent in the sections with threaded threads and at the ends.
The zinc film must be applied with high quality, it is not allowed to have blistering, delamination from the base metal and foreign inclusions (oxides, sintered charge, zinc waste, etc.).
GOST permits the presence of flux stains on the surface of galvanized pipes, small influx of zinc, roughness and traces that are left by elements of lifting devices.
If areas not covered with zinc are found on the water and gas pipes, then they can be reprocessed, provided that the total area of such areas does not exceed 0.5% of the entire surface area of this product.

Galvanized VGP pipes

The customer can negotiate with the manufacturer a complete set of GOST couplings (8944, 8954, 8965, 8966) - one coupling for each product.
On the surface of the pipes such defects as swelling, sunsets, cracks, oxide film are excluded, and delamination on the ends of the products.
On the surface of water and gas pipes, there may be individual defects that are due to the production method (ripples, risks, dents, traces of stripping). At the same time, such defects should not reduce the pipe wall thickness below the tolerance specified in the assortment. A layer of scale may also be present, but should not interfere with product inspection.
The ends of the water and gas pipes supplied to the consumer are cut at right angles. The bevel, if it occurs during trimming, should not exceed 2 degrees. The amount of burrs remaining after trimming should not exceed half a millimeter.

Pipes are checked for compliance with GOST selectively - at least two products from each batch are examined

The regulatory document also stipulates the control methods to which all pipes of the water and gas supply category are subject to mandatory:

Hydraulic pressure test that pipes must withstand:

Ordinary and light type- 25 kgf / cm2 (2.4 MPa);

Reinforced - 32 kgf / cm2 (3.1 MPa);

Compliant with special requirements - 50 kgf / cm2 (4.9 MPa).

Bend tests carried out on mandrels with a radius of:

- 2.5 sizes of outer diameter - products with remote control up to 40 mm;

- 3.5 sizes of outer diameter - pipes with DN 50 mm.

Dispensing test for water and gas pipes with remote control:

- 15-50 mm - not less than 7%;

Labeling and storage conditions

By the marking of water and gas pipes, which must also comply with GOST, you can find out almost all the necessary information about the product: geometric dimensions, manufacturing and processing methods, quality of the material of manufacture. At the end of the marking, the number must be indicated regulatory document, in accordance with which the product is manufactured.

Legend examples

Special requirements for the packing of VGP pipes are imposed only if their outer diameter is from 6 to 20 mm. Such pipes can be packed in coils at the customer's request.

Depending on the type of water and gas pipes, the storage conditions may be as follows.

Galvanized products, which are characterized by increased resistance to the formation and development of corrosion, are reliably fixed in storage areas and protected from direct moisture penetration.
Water and gas pipes that are not covered with a protective zinc layer must be stored in a fixed position in dry rooms with a minimum level of ambient humidity.

GOST 3262-75 Steel water and gas pipes: dimensions, characteristics

GOST 3262-75 and its requirements for steel water and gas pipes. Specifications, scope and methods of quality control of VGP pipes.

Steel pipes for water and gas supply specifications gost 3262-75

STATE STANDARD OF THE UNION OF SSR

STEEL WATER AND GAS PIPES GOST

Specifications 3262-75

Water-supply and gas-supply steel pipes

Date of introduction 01.01.77

At the request of the consumer, pipes of a light series intended for thread rolling are made according to the dimensions and weight given in table. 2.

b) unmeasured length.

Pipe wall thickness

Weight of 1 m pipes, kg

Steel pipes for water and gas supply technical conditions GOST 3262-75 - Document - page

Document - This standard applies to non-galvanized and galvanized steel welded pipes with threaded or rolled cylindrical threads and without threads, used for water and gas pipelines, heating systems, as well as for

STATE STANDARD OF THE UNION OF SSR

Technical conditions Water-supply and gas-supply Specifications

Date of introduction: 01.01.77

(Modified edition, Amendments No. 2, 3, 5).

1. VARIETY

1.1. Pipes are manufactured according to the dimensions and weight given in table. one.

At the request of the consumer, pipes of a light series intended for thread rolling are manufactured according to the dimensions and weight given in Table 2.

1.2. The length of the pipe is made from 4 to 12 m:

a) measured or multiple measured lengths with an allowance for each cut of 5 mm and a maximum deviation for the entire length plus 10 mm;

b) unmeasured length.

By agreement between the manufacturer and the consumer, in a batch of off-gauge pipes, up to 5% of pipes with a length of 1.5 to 4 m are allowed.

(Modified edition, Amendments No. 3, 4).

1. For a thread made by the knurling method, on a pipe it is allowed to reduce its inner diameter by up to 10% along the entire length of the thread.

2. The mass of 1 m of pipes is calculated at a density of steel equal to 7.85 g / cm 3. Galvanized pipes are heavier than non-galvanized ones by 3%.

(Modified edition, Amendments No. 1, 3)

1.3. Limit deviations in pipe dimensions should not exceed those indicated in table. 3.

1. The maximum deviation to the plus side in the wall thickness is limited by the maximum deviations in the mass of the pipes.

1.4. Maximum deviations in pipe weight should not exceed + 8%.

At the request of the consumer, the maximum deviations in weight should not exceed:

7.5% - for the party;

10% - for a separate pipe.

(Changed edition, Amendments No. 2, 5).

1.5. The curvature of pipes for 1 m of length should not exceed:

2 mm - with nominal bore up to 20 mm inclusive;

1.5 mm - with a nominal bore over 20 mm.

1.6. The pipe threads can be long or short. The requirements for the thread must correspond to those indicated in table. 4.

1.7. Pipes with a nominal bore of 6, 8, 10, 15 and 20 mm are wound into coils at the request of the consumer.

Legend examples

Ordinary pipe, non-galvanized, of normal manufacturing accuracy, off-gauge length, with a nominal bore of 20 mm, wall thickness of 2.8 mm, without thread and without coupling:

The same, measured length, with thread:

Pipe Р-20 × 2.8 - 4000 GOST 3262-75

The same, with zinc coating, unmeasured length, with thread:

The same, with a zinc coating, measured length, with a thread:

Pipe Ts-R-20 × 2.8 - 4000 GOST 3262-75

For pipes for thread rolling, the letter H is indicated in the symbol after the word "pipe".

For pipes with a long thread, the letter D. is indicated in the symbol after the word "pipe".

For pipes of increased manufacturing accuracy, the letter P. is indicated in the symbol after the size of the nominal bore.

(Modified edition, Amendment No. 1).

2. TECHNICAL REQUIREMENTS

Pipes for parts of water supply and gas supply structures are made of steel in accordance with GOST 1050-88.

At the request of the consumer, on ordinary and reinforced pipes with a nominal bore of more than 10 mm, the thread is applied to both ends of the pipe.

2.1; 2.2. (Modified edition, Amendments No. 3, 4).

2.3. At the request of the consumer, pipes are completed with couplings made in accordance with GOST 8944-75, GOST 8954-75, GOST 8965-75 and GOST 8966-75 at the rate of one coupling for each pipe.

(Modified edition, Amendment No. 3).

2.4. Cracks, captivity, swelling and sunsets are not allowed on the pipe surface.

No delamination is allowed at the ends of the pipes.

On pipes made by furnace welding, it is allowed to reduce the outer diameter to 0.5 mm at the seam, if there is a shallow thickening in this place of not more than 1.0 mm along the inner diameter.

(Modified edition, Amendments No. 3, 4).

(Modified edition, Amendments No. 2, 3, 4, 5, 6).

By agreement between the manufacturer and the consumer, burrs up to 1 mm are allowed on pipes with a nominal bore of 6-25 mm, made by furnace welding.

(Modified edition, Amendments No. 4, 6).

2.7. Galvanized pipes must have a continuous zinc coating over the entire surface with a thickness of at least 30 microns. The absence of zinc coating on the ends and threads of the pipes is allowed.

On the surface of galvanized pipes, blistering and foreign inclusions (hard zinc, oxides, sintered charge), peeling of the coating from the base metal are not allowed.

Separate flux spots and traces of pipe gripping by lifting devices, roughness and slight local influx of zinc are allowed.

It is allowed to correct individual non-galvanized sections by 0.5% of the outer surface of the pipe in accordance with GOST 9.307-89.

(Modified edition, Amendments No. 3, 4).

2.8. The pipes must be able to withstand the hydraulic pressure:

2.4 MPa (25 kgf / cm 2) - pipes, ordinary and light;

3.1 MPa (32 kgf / cm 2) - reinforced pipes.

At the request of the consumer, pipes must withstand a hydraulic pressure of 4.9 MPa (50 kgf / cm 2)

(Modified edition, Amendments No. 2, 3, 5).

2.9. Pipes with a nominal bore up to 40 mm inclusive must withstand the bend test around a mandrel with a radius equal to 2.5 of the outer diameter, and with a nominal bore of 50 mm - on a mandrel with a radius equal to 3.5 of the outer diameter.

At the request of the consumer, pipes must withstand the expansion test:

for pipes with nominal bore from 15 to 50 mm - not less than 7%;

for pipes with a nominal bore of 65 and more - at least 4%.

At the request of the consumer, pipes must withstand the flattening test up to a distance between flattened surfaces equal to 2/3 of the outer diameter of the pipes.

(Modified edition, Amendments No. 2, 3, 5).

2.10. At the request of the consumer, the mechanical properties of pipes for parts of water and gas pipelines must comply with GOST 1050-88.

2.11. The pipe thread must be clean, without flaws and burrs and comply with GOST 6357-81, accuracy class B.

Pipes with cylindrical threads are used for assembly with seals.

2.10; 2.11. (Modified edition, Amendments No. 3, 4).

(Modified edition, Amendments No. 2, 3, 5).

2.13. Allowed on the thread to reduce the useful length of the thread (without runaway) up to 15% compared to that indicated in table. 4, and at the request of the consumer up to 10%.

(Modified edition, Amendments No. 2, 3, 5).

2.14. Threading on galvanized pipes is carried out after galvanizing.

2.16. At the request of the consumer, pipe welds are subjected to non-destructive testing.

(Modified edition, Amendment No. 5).

3. RULES OF ACCEPTANCE

3.1. Pipes are accepted in batches. The batch must consist of pipes of the same size, of the same brand and be accompanied by one quality document in accordance with GOST 10692-80 with an addition for pipes intended for the manufacture of parts of water supply and gas pipelines, made of steel in accordance with GOST 1050-88: chemical composition and mechanical properties steel in accordance with the document on the quality of the manufacturer of the billet.

The mass of the batch is not more than 60 tons.

(Modified edition, Amendments No. 3, 4).

3.2. The surface, dimensions and curvature are checked for each pipe in the batch.

It is allowed to apply statistical control methods in accordance with GOST 18242-72 with a normal level. Control plans are established by agreement between the manufacturer and the consumer.

Control of the outer diameter of pipes is carried out at a distance of at least 15 mm from the end of the pipe.

(Modified edition, Amendments No. 3, 4, 5).

3.3. To control the parameters of the thread, for testing for expansion, flattening, bending, the height of the internal burr, the remnants of burrs, the right angle and the angle of the chamfer (for pipes with beveled edges), mechanical properties, take no more than 1%, but not less than two pipes from the batch, and for pipes made by continuous furnace welding, two pipes per batch.

(Modified edition, Amendments No. 3, 4).

3.4. All pipes are subject to weight control.

(Modified edition, Amendment No. 3).

(Modified edition, Amendment No. 6).

3.6. To check the thickness of the zinc coating on the outer surface and in accessible places on the inner surface, two pipes are taken from the batch.

(Modified edition, Amendment No. 2).

3.7. Upon receipt of unsatisfactory test results for at least one of the indicators for it, a repeated test is carried out on a doubled sample.

Retest results apply to the entire batch.

4. TEST METHODS

4.1. For quality control, one sample is cut from each selected pipe for each type of test.

The tensile test is carried out in accordance with GOST 10006-80. Instead of tensile testing, it is allowed to carry out control of mechanical properties by non-destructive methods.

4.2. Inspection of the pipe surface is carried out visually.

4.3. The hydraulic test is carried out in accordance with GOST 3845-75 with holding under test pressure for at least 5 s.

4.4. The bend test is carried out in accordance with GOST 3728-78. Galvanized pipes are tested prior to coating.

(Modified edition, Amendment No. 3).

4.4a. The expansion test is carried out in accordance with GOST 8694-75 on a tapered mandrel with a taper angle of 6 °.

Testing on a mandrel with a taper angle of 30 ° is allowed.

(Modified edition, Amendments No. 3, 4).

4.4b. Flattening test is carried out according to GOST 8695-75.

(Modified edition, Amendment No. 3).

4.4c. The control of the welded seam is carried out by non-destructive methods according to the normative and technical documentation.

(Introduced additionally, Amendment No. 3).

4.6. The thread is checked with threaded ring gauges in accordance with GOST 2533-88 (third class of accuracy).

In this case, the screwing capacity of the no-through ring gauge on the thread should be no more than three turns.

(Modified edition, Amendments No. 3, 4).

4.7. The curvature of the pipes is controlled with a straight edge in accordance with GOST 8026-92 and a set of probes in accordance with TU 2-034-225-87.

(Modified edition, Amendments No. 3, 5).

(Modified edition, Amendments No. 3, 6).

4.9. Outside diameter control is carried out with smooth micrometers in accordance with GOST 6507-90, calibers-staples in accordance with GOST 2216-84 or GOST 18360-93.

The length of the pipes is measured with a tape measure in accordance with GOST 7502-98. The thread is controlled with gauges in accordance with GOST 2533-88.

The control of the mass of a batch of pipes is carried out on a scale of no more than 10 tons with a graduation price of no more than 20 kg.

(Changed edition, Amendments No. 3, 4, 5, 6).

4.10. The control of the welded seam is carried out by non-destructive methods according to the technical documentation.

(Introduced additionally, Amendment No. 4).

5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

5.1. Marking, packaging, transportation and storage are carried out in accordance with GOST 10692-80 with the addition.

5.1.1. The pipe thread must be protected from mechanical damage and corrosion with a lubricant according to the normative and technical documentation.

Sec. 5. (Modified edition, Amendment No. 3).

INFORMATION DATA

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

V. I. Struzhok, Cand. tech. sciences, V. M. Vorona, Cand. tech. sciences, Yu.M. Mironov, Cand. tech. nook, A. I. Postolova

2. APPROVED AND INTRODUCED INTO EFFECT by the Decree of the USSR State Committee for Standards dated 09/11/75 No. 2379

3. Inspection frequency 5 years

4. REPLACE GOST 3262-62

5. REFERENCE REGULATORY AND TECHNICAL DOCUMENTS

6. Reprinted (May 1994) with Amendments No. 1, 2, 3, 4, 5, 6, approved in November 1977, December 1978, January 1987, May 1988, November 1989. , November 1991 (IUS 1-78, 2-79, 4-87, 8-88, 2-90, 2-92)

INTERSTATE STANDARD

STEEL PIPES
WATER AND GAS PIPELINES

TECHNICAL CONDITIONS

Date of introduction 01.01.77

1. VARIETY

1.1. Pipes are manufactured according to the dimensions and weight given in table. one.

At the request of the consumer, pipes of a light series intended for thread rolling are made according to the dimensions and weight given in table. 2.

1.2. The length of the pipe is made from 4 to 12 m:

a) measured or multiple measured lengths with an allowance for each cut of 5 mm and a maximum deviation for the entire length plus 10 mm;

b) unmeasured length.

By agreement between the manufacturer and the consumer, in a batch of off-gauge pipes, up to 5% of pipes with a length of 1.5 to 4 m are allowed.

Table 1

Conditional pass	Outside diameter	Pipe wall thickness			Weight of 1 m pipes, kg
Conditional pass	Outside diameter		ordinary	reinforced		ordinary	reinforced

table 2

Conditional pass	Outside diameter	Wall thickness	Weight of 1 m pipes, kg








Notes: 1. For a thread made by the knurling method, on a pipe it is allowed to reduce its inner diameter by up to 10% along the entire length of the thread. 2. The mass of 1 m of pipes is calculated at a density of steel equal to 7.85 g / cm 3. Galvanized pipes are heavier than non-galvanized ones by 3%.

1.3. Limit deviations in pipe dimensions should not exceed those indicated in table. 3.

Table 3

Pipe dimensions		Pipe dimensions	Limit deviations for pipes of manufacturing accuracy
Pipe dimensions	increased	Pipe dimensions		increased
		Outside diameter with nominal bore:
		over 40 mm
up to 40 mm incl.		Wall thickness
Notes: 1. The maximum deviation to the plus side in the wall thickness is limited by the maximum deviations in the mass of the pipes. 2. Pipes of normal manufacturing accuracy are used for water pipelines, gas pipelines and heating systems. Pipes of increased manufacturing accuracy are used for parts of water supply and gas supply structures.

1.4. Maximum deviations in pipe weight should not exceed +8%.

At the request of the consumer, the maximum deviations in weight should not exceed:

7.5% - for the party;

10% - for a separate pipe.

(Changed edition, Amendments No. 2, 5).

1.5. The curvature of pipes for 1 m of length should not exceed:

2 mm - with nominal bore up to 20 mm inclusive;

1.5 mm - with a nominal bore over 20 mm.

1.6. The pipe threads can be long or short. The requirements for the thread must correspond to those indicated in table. 4.

Table 4

Nominal bore, mm	Thread length to run		Nominal bore, mm	Number of threads at conditional passage	Thread length to run
Nominal bore, mm		short	Nominal bore, mm	Number of threads at conditional passage		short

1.7. Pipes with a nominal bore of 6, 8, 10, 15 and 20 mm are wound into coils at the request of the consumer.

Legend examples

Ordinary pipe, non-galvanized, of normal manufacturing accuracy, off-gauge length, with a nominal bore of 20 mm, wall thickness of 2.8 mm, without thread and without coupling:

The same with the clutch:

The same, measured length, with thread:

The same, with zinc coating, unmeasured length, with thread:

The same, with a zinc coating, measured length, with a thread:

For pipes for thread rolling, the letter H is indicated in the symbol after the word "pipe".

For pipes with a long thread, the letter D. is indicated in the symbol after the word "pipe".

For pipes of increased manufacturing accuracy, the letter P. is indicated in the symbol after the size of the nominal bore.

(Modified edition, Amendment No. 1).

2. TECHNICAL REQUIREMENTS

Pipes for parts of water supply and gas supply structures are made of steel in accordance with GOST 1050.

2.2. At the request of the consumer, the ends of pipes to be welded with a wall thickness of 5 mm or more must be chamfered at an angle of 35 - 40 ° to the end of the pipe. In this case, an end ring with a width of 1 - 3 mm should be left.

At the request of the consumer, on ordinary and reinforced pipes with a nominal bore of more than 10 mm, the thread is applied to both ends of the pipe.

2.1; 2.2.

2.3. At the request of the consumer, pipes are completed with couplings made in accordance with GOST 8944, GOST 8954, GOST 8965 and GOST 8966 at the rate of one coupling for each pipe.

(Modified edition, Amendment No. 3).

2.4. Cracks, captivity, swelling and sunsets are not allowed on the pipe surface.

No delamination is allowed at the ends of the pipes.

On pipes made by furnace welding, it is allowed to reduce the outer diameter to 0.5 mm at the seam, if there is a shallow thickening in this place of not more than 1.0 mm along the inner diameter.

(Modified edition, Amendments No. 3, 4).

(Modified edition, Amendments No. 2, 3, 4, 5, 6).

By agreement between the manufacturer and the consumer, on pipes with a nominal bore of 6 - 25 mm, made by furnace welding, burrs up to 1 mm are allowed.

(Modified edition, Amendments No. 4, 6).

2.7. Galvanized pipes must have a continuous zinc coating over the entire surface with a thickness of at least 30 microns. The absence of zinc coating on the ends and threads of the pipes is allowed.

On the surface of galvanized pipes, blistering and foreign inclusions (hard zinc, oxides, sintered charge), peeling of the coating from the base metal are not allowed.

Separate flux spots and traces of pipe gripping by lifting devices, roughness and slight local influx of zinc are allowed.

It is allowed to correct individual non-galvanized sections by 0.5% of the outer surface of the pipe in accordance with GOST 9.307.

(Modified edition, Amendments No. 3, 4).

2.8. The pipes must be able to withstand the hydraulic pressure:

2.4 MPa (25 kgf / cm 2) - pipes, ordinary and light;

3.1 MPa (32 kgf / cm 2) - reinforced pipes.

At the request of the consumer, pipes must withstand a hydraulic pressure of 4.9 MPa (50 kgf / cm 2)

(Modified edition, Amendments No. 2, 3, 5).

At the request of the consumer, pipes must withstand the expansion test:

for pipes with nominal bore from 15 to 50 mm - not less than 7%;

for pipes with a nominal bore of 65 and more - at least 4%.

At the request of the consumer, pipes must withstand the flattening test up to a distance between flattened surfaces equal to 2/3 of the outer diameter of the pipes.

(Modified edition, Amendments No. 2, 3, 5).

2.10. At the request of the consumer, the mechanical properties of pipes for parts of water and gas supply structures must comply with GOST 1050.

2.11. The pipe thread must be clean, without flaws and burrs and comply with GOST 6357, accuracy class B.

Pipes with cylindrical threads are used for assembly with seals.

2.10; 2.11. (Modified edition, Amendments No. 3, 4).

(Modified edition, Amendments No. 2, 3, 5).

2.13. Allowed on the thread to reduce the useful length of the thread (without runaway) up to 15% compared to that indicated in table. 4, and at the request of the consumer up to 10%.

(Modified edition, Amendments No. 2, 3, 5).

2.14. Threading on galvanized pipes is carried out after galvanizing.

2.15. (Deleted, Amendment No. 3).

2.16. At the request of the consumer, pipe welds are subjected to non-destructive testing.

(Modified edition, Amendment No. 5).

3. RULES OF ACCEPTANCE

3.1. Pipes are accepted in batches. A batch must consist of pipes of the same size, of the same grade and be accompanied by one quality document in accordance with GOST 10692 with an addition for pipes intended for the manufacture of parts of water supply and gas pipelines from steel in accordance with GOST 1050: chemical composition and mechanical properties of steel in accordance with document on the quality of the manufacturer of the workpiece.

The mass of the batch is not more than 60 tons.

(Modified edition, Amendments No. 3, 4).

3.2. The surface, dimensions and curvature are checked for each pipe in the batch.

It is allowed to apply statistical control methods in accordance with GOST 18242 * with a normal level. Control plans are established by agreement between the manufacturer and the consumer.

* On the territory of the Russian Federation, GOST R 50779.71-99 is in force.

Control of the outer diameter of pipes is carried out at a distance of at least 15 mm from the end of the pipe.

(Modified edition, Amendments No. 3, 4, 5).

(Modified edition, Amendments No. 3, 4).

3.4. All pipes are subject to weight control.

(Modified edition, Amendment No. 3).

(Modified edition, Amendment No. 6).

3.6. To check the thickness of the zinc coating on the outer surface and in accessible places on the inner surface, two pipes are taken from the batch.

(Modified edition, Amendment No. 2).

3.7. Upon receipt of unsatisfactory test results for at least one of the indicators for it, a repeated test is carried out on a doubled sample.

Retest results apply to the entire batch.

4. TEST METHODS

4.1. For quality control, one sample is cut from each selected pipe for each type of test.

The tensile test is carried out in accordance with GOST 10006. Instead of tensile testing, it is allowed to carry out control of mechanical properties by non-destructive methods.

(Modified edition, Amendments No. 3, 6).

4.2. Inspection of the pipe surface is carried out visually.

4.3. The hydraulic test is carried out in accordance with GOST 3845 with holding under test pressure for at least 5 s.

4.4. The bend test is carried out in accordance with GOST 3728. Galvanized pipes are tested prior to coating.

(Modified edition, Amendment No. 3).

4.4a. The expansion test is carried out in accordance with GOST 8694 on a tapered mandrel with a taper angle of 6 °.

Testing on a mandrel with a taper angle of 30 ° is allowed.

(Modified edition, Amendments No. 3, 4).

4.4b. Flattening test is carried out according to GOST 8695.

(Modified edition, Amendment No. 3).

4.4c. The control of the welded seam is carried out by non-destructive methods according to the normative and technical documentation.

(Introducedadditionally, rev. No. 3).

4.5. The thickness of the zinc coating on the outer surface and in accessible places on the inner surface is controlled in accordance with GOST 9.301 and GOST 9.302, as well as with devices of the MT-41NTs, MTZON type or the Impulse type according to regulatory and technical documentation.

4.6. The thread is checked with threaded ring gauges in accordance with GOST 2533 (third class of accuracy).

In this case, the screwing capacity of the no-through ring gauge on the thread should be no more than three turns.

(Modified edition, Amendments No. 3, 4).

4.7. The curvature of the pipes is controlled with a straight edge in accordance with GOST 8026 and a set of probes in accordance with NTD.

(Modified edition, Amendments No. 3, 5).

4.8. The right angle of the pipe ends is controlled with a 90 ° square with a size of 160 × 100 mm, class 3 GOST 3749, plate probes set 4 according to NTD or a goniometer

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