Gas pipeline steel gost. Pipes steel water and gas

Pipes of the VGP category are a group of water and gas pipes made of steel. Moreover, there are galvanized and non-galvanized options. Pipes are hollow, cylindrical in shape, having a longitudinal welded seam.

The category has three options for wall thickness - thick-walled, medium and thin-walled. An assortment of this nature makes it possible to use pipes that are suitable specifically for this project in which they are used.

Product parameters

The name speaks for itself - a pipe of this type can be used both in plumbing systems and in gas pipelines. In principle, the VGP pipe is considered a universal option for many applications.

Standard pipes have a length of segments from 4 m to 12 m. Moreover, there is a choice of material - without thread, or with cylindrical or knurled threads at the ends. Moreover, it can be short or long - it all depends on the nuances in use.

Typically, the VGP pipe has three strength categories:

1. Ordinary.
2. Lungs.
3. Reinforced.

Although such pipes are heavier than non-galvanized ones, by about 3%, the coating gives an excellent result when liquids pass through the line. The pipe does not rust, and its service life is extended significantly.

Advantages of VGP pipes

1. Standard pipes VGP GOST 3262 75 are made of high quality steel.
2. The so-called "black pipes" of the VGP have a reinforced welded seam.
3. Pipes of this type have three categories convenient for the consumer - light, reinforced and ordinary. This allows you to choose the right option for the perfect design of the highway.
4. The thread at the ends of the pipes can be long, short, or applied, depending on the customer's wishes, on the desired side in desired parameters.
5. Pipes of this category are supplied either with or without couplings.
6. Pipe parameters can be indicated in inches, which is considered the norm.
7. The pipes being sold undergo mandatory hydro-vortex control, so compliance with the standards can be considered almost perfect.
8. Low cost with excellent product quality is the guarantor of the assigned standards and regulations.
9. Versatility in application. Pipes desired type ideal for installation and repair work of almost any category.
10. A huge range of pipe varieties - from hot-rolled seamless to cold-rolled and electric-welded options.
11. The presence of components - flanges, couplings, tees, bends, transitions and other things, as well as the possibility of their easy use in installation work.

As you can see, standard VGP pipes GOST 3262 75 have a wide range of applications. The presence of at least three types of this type makes it possible to use them in almost all areas of pipelines. Moreover, it is possible to select a category for the type of line, with a rich selection of pipe types for its installation.

INTERSTATE STANDARD

TECHNICAL CONDITIONS

Official edition

Standartinform

UDC 669.14-462:006.354

INTERSTATE

Group B62

STANDARD

STEEL WATER AND GAS PIPES

Specifications

Water-supply and gas-supply steel pipes. Specifications

MKS 23.040.10 OKP 13 8500, 13 8501

Introduction date 01.01.77

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

(Changed edition, Rev. No. 2, 3, 5).

1. ASSORTMENT

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

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

(Changed edition, Rev. No. 1, 3).

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

measured or multiple measured length 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, up to 5% of pipes with a length of 1.5 to 4 m are allowed in a batch of off-gauge pipes.

Official edition

Reprint prohibited

© Standards Publishing House, 1976 © Standartinform, 2007

Dimensions, mm

Table 1

		Pipe Wall Thickness			Weight of 1 m of pipes, kg

Table 2 Dimensions, mm

Notes:

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

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

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

Table 3

Notes:

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

2. Pipes of ordinary manufacturing accuracy are used for water pipes, gas pipelines and heating systems. Pipes of increased manufacturing accuracy are used for parts of water and gas pipeline structures.

1.4. Maximum deviations in the mass of pipes should not exceed +8%.

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

7.5% - for the party;

10% - for a single pipe.

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

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

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

1.5 mm - with nominal bore over 20 mm.

1.6. Pipe threads can be long or short. Thread requirements must comply with those specified in table. 4.

Table 4

Conditional passage, mm		Thread length to the run, mm		Conditional passage, mm	Number of threads with conditional passage	Thread length to the run, mm
			short				short

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

Ordinary pipe, non-galvanized, of the usual manufacturing accuracy, random length, with a nominal bore of 20 mm, a wall thickness of 2.8 mm, without thread and without a 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, threaded:

Pipe R-20x 2.8-4000 GOST 3262-75 The same, with zinc coating, random length, threaded:

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

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

For pipes for knurling in symbol after the word "pipe" the letter N is indicated.

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

(Revised edition, Rev. 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 according to GOST 380 and GOST 1050 without standardization of mechanical properties and chemical composition.

Pipes for parts of water and gas pipeline structures are made of steel according to GOST 1050.

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 removed 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. (Changed edition, Rev. No. 3, 4).

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

(Revised edition, Rev. No. 3).

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

At the ends of the pipes, delamination is not allowed.

Separate dents, ripples, risks, traces of stripping and other defects due to the production method are allowed, if they do not take the wall thickness beyond the minimum dimensions, as well as a scale layer 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 weld site if there is a gentle thickening of the inner diameter of not more than 1.0 mm in this place.

(Changed edition, Rev. No. 3, 4).

2.5. At the request of the consumer on pipes with a nominal bore of 20 mm or more on inner surface the seam of pipes, 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 the method of furnace welding and the method of hot reduction, a gentle thickening of a height of not more than 0.5 mm is allowed on the inner surface of the pipes in the weld zone.

(Changed edition, Rev. No. 2, 3, 4, 5, 6).

2.6. Pipe ends must be cut square. The value of the bevel of the end is allowed no more than 2 °. Burr residues should not exceed 0.5 mm. When removing burrs, the formation of blunting (rounding) of the ends is allowed. It is allowed to cut pipes in the mill line.

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.

(Changed edition, Rev. 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 pipes is allowed.

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

Separate flux spots and traces of pipes being caught by lifting devices, roughness and slight local zinc deposits are allowed.

It is allowed to correct individual non-galvanized sections by 0.5% outer surface pipes according to GOST 9.307.

(Changed edition, Rev. No. 3, 4).

2.8. Pipes must withstand 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).

2.9. Pipes with a nominal bore up to 40 mm inclusive must withstand a 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, the 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 mm or more - at least 4%.

At the request of the consumer, the 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. (Changed edition, Rev. No. 2, 3, 5).

2.10. At the request of the consumer, the mechanical properties of pipes for parts of water and gas pipeline 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 when assembling with seals.

2.10, 2.11. (Changed edition, Rev. No. 3, 4).

2.12. In the place of the seam, blackness is allowed on the threads of the thread, 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 broken (for cut) or incomplete (for knurled) threads are allowed on threads, 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 length of the thread (without run-off) up to 15% compared to that indicated in Table. 4, and at the request of the consumer - up to 10%.

2.12, 2.13. (Changed edition, Rev. No. 2, 3, 5).

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

2.15. (Deleted, Rev. No. 3).

2.16. At the request of the consumer, welded seams of pipes are subjected to control by non-destructive methods.

(Revised edition, Rev. No. 5).

3. ACCEPTANCE RULES

3.1. Pipes are accepted in batches. The batch must consist of pipes of the same size, 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 for water and gas pipeline structures, from steel in accordance with GOST 1050; chemical composition and mechanical properties of steel - in accordance with the document on the quality of the enterprise - the manufacturer of the workpiece.

Party weight - no more than 60 tons.

(Changed edition, Rev. No. 3, 4).

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

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

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

(Changed edition, Rev. No. 3, 4, 5).

3.3. To control the parameters of the thread, to test for expansion, flattening, bending, the height of the internal burr, burr residues, right angle and chamfer angle (for pipes with beveled edges), mechanical properties, no more than 1%, but not less than two pipes from the lot are selected, and for pipes manufactured by continuous furnace welding, two pipes per batch.

(Changed edition, Rev. No. 3, 4).

3.4. All pipes are subjected to mass control.

(Revised edition, Rev. No. 3).

3.5. Each pipe is subjected to a hydraulic pressure test. With 100% quality control of the weld by non-destructive methods, hydraulic pressure testing may not be carried out. At the same time, the ability of the pipes to withstand the test hydraulic pressure is guaranteed.

(Revised edition, Rev. 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 lot.

(Revised edition, Rev. No. 2).

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

The retest results apply to the entire lot.

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 the tensile test, it is allowed to control the mechanical properties by non-destructive methods.

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

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

4.4. The bend test is carried out according to GOST 3728. Galvanized pipes are tested before coating.

(Revised edition, Rev. No. 3).

4.4a. The expansion test is carried out according to GOST 8694 on a conical mandrel with a taper angle of 6°.

The test can be carried out on a mandrel with a taper angle of 30°.

(Changed edition, Rev. No. 3, 4).

In the territory Russian Federation GOST R 50779.71-99 applies.

4.46. The flattening test is carried out according to GOST 8695.

(Revised edition, Rev. No. 3).

4.4c. Weld seam control is carried out by non-destructive methods according to normative documentation.

(Introduced additionally, 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 or Impulse types according to regulatory documentation.

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

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

(Changed edition, Rev. No. 3, 4).

4.7. The curvature of the pipes is controlled by a straightedge according to GOST 8026 and a set of probes according to ID.

(Changed edition, Rev. No. 3, 5).

4.8. The right angle of the ends of the pipes is controlled by a 90 ° square with a size of 160 x 100 mm class 3 according to GOST 3749, with lamellar probes of set 4 according to ID or a goniometer according to GOST 5378. The bevel angle of the chamfer is controlled by a goniometer according to GOST 5378.

(Changed edition, Rev. No. 3, 6).

4.9. The control of the outer diameter is carried out with smooth micrometers in accordance with GOST 6507, with staple gauges in accordance with GOST 2216 or GOST 18360.

The wall thickness, the height of the internal burr and the height of the burrs are measured with a micrometer according to GOST 6507 or a wall gauge according to 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 scales not exceeding Utah with a division value of not more than 20 kg.

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

4.10. Weld seam control is carried out by non-destructive methods according to technical documentation.

(Introduced additionally, Rev. No. 4).

5. MARKING, PACKAGING, TRANSPORT AND STORAGE

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

5.1.1. Pipe threads must be protected from mechanical damage and corrosion by grease in accordance with regulatory documents.

Sec. 5. (Changed edition, Rev. No. 3).

INFORMATION DATA

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

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

2. APPROVED AND INTRODUCED BY Decree of the USSR State Committee for Standards No. 2379 of September 11, 1975

3. Periodicity of inspection - 5 years

4. REPLACE GOST 3262-62

5. REFERENCE REGULATIONS 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 removed by the Decree of the State Standard of the USSR dated 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 proofing I.A. Naleykina

Handed over to the set 05/14/2007. Signed for publication on 06/05/2007. Format 60 x 84 Vs - Offset paper. Headset Times. Offset printing. Uel. oven l. 0.93. Uch.-ed. l. 0.80. Circulation 126 copies. Zach. 421. From 4031.

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

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

This group includes non-galvanized and galvanized welded steel pipes used for water and gas pipelines, as well as for heating systems and structural parts. By lenght water pipes are made from 4 to 12 m:
a) measured or multiple measured length with an allowance for each cut of 5 mm and a longitudinal deviation for the entire length plus 10 mm;
b) unmeasured length.

By agreement between the manufacturer and the consumer in a batch of unmeasured water and gas pipes up to 5% of pipes with a length of 1.5 to 4 m are allowed.

For a thread made by knurling, a reduction in its inner diameter of up to 10% along the entire length of the thread is allowed on the pipe. Weight 1 m water pipe calculated with a steel density of 7.85 g/cm. Galvanized water pipes 3% heavier than non-galvanized ones.

Note: The maximum deviation in the plus side along the wall thickness is limited by the maximum deviations in mass water and gas pipes. Water and gas pipes of ordinary manufacturing accuracy are used for water pipes, gas pipelines and heating systems.

Water and gas pipes of increased manufacturing accuracy are used for parts of water and gas pipeline structures.

Maximum deviations in the mass of pipes should not exceed + 8%. At the request of the consumer, the maximum deviations in mass should not exceed: + 7.5% - for the batch; + 10% - for a separate pipe.
The curvature of water and gas pipes per 1 m of length should not exceed: 2 mm - with a nominal bore of up to 20 mm inclusive; 1.5 mm - with nominal bore over 20 mm.

Water and gas 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, not galvanized, of the usual manufacturing accuracy, random length, with a nominal bore of 20 mm, a wall thickness of 2.8 mm, without thread and without a coupling: pipe 20x2.8 GOST 3262-75.
The same, with a coupling: pipe M-20x2.8 GOST 3262-75.
The same, measured length, with thread: R-20x2 pipe, 8-4000 GOST 3262-75.

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

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

For water and gas pipes of increased manufacturing accuracy, the letter P is indicated in the symbol after the size of the conditional passage.

Parameters of water and gas pipes (GOST 3262-75)

DU Conditional designation	Outer diameter, mm	Lungs			Ordinary			Reinforced
		Wall thickness, mm	Weight 1m, kg	Meters per ton	Wall thickness, mm	Weight 1m, kg	Meters per ton	Wall thickness, mm	Weight 1m, kg	Meters per ton
6	10,2	1,8	0,37	2681,8	2,0	0,40	2472,5	2,5	0,47	2106,4
8	13,5	2,0	0,57	1763,0	2,2	0,61	1631,1	2,8	0,74	1353,4
10	17,0	2,0	0,74	1351,6	2,8	0,98	1019,8	2,8	0,98	1019,8
15	21,3	2,5	1,16	862,7	2,8	1,28	782,8	3,2	1,43	700,1
20	26,8	2,5	1,50	667,5	2,8	1,66	603,4	3,2	1,86	536,9
25	33,5	2,8	2,12	471,7	3,2	2,39	418,2	4,0	2,91	343,6
32	42,3	2,8	2,73	366,6	3,2	3,09	324,1	4,0	3,78	264,7
40	48,0	3,0	3,33	300,4	3,5	3,84	260,3	4,0	4,34	230,4
50	60,0	3,0	4,22	237,1	3,5	4,88	205,1	4,5	6,16	162,4
65	75,5	3,2	5,71	175,3	4,0	7,05	141,8	4,5	7,88	126,9
80	88,5	3,5	7,34	136,3	4,0	8,34	120,0	4,5	9,32	107,3
90	101,3	3,5	8,44	118,5	4,0	9,60	104,2	4,5	10,74	93,1
100	114,0	4,0	10,85	92,2	4,5	12,15	82,3	5,0	13,44	74,4
125	140,0	4,0	13,42	74,5	4,5	15,04	66,5	5,5	18,24	54,8
150	165,0	4,0	15,88	63,0	4,5	17,81	56,1	5,5	21,63	46,2

Steel pipes for water and gas pipelines, galvanized and non-galvanized (black) with cut or knurled cylindrical threads and without threads, are manufactured according to the nominal bore (DN) and wall thickness according to GOST 3262-75 .

The piping must match GOST 3262-75 .

The length of the pipe is made:

• measured length - from 4 before 12m;
• unmeasured length, within the measured.

According to the manufacturing accuracy group, water and gas pipes are divided into:

• ordinary precision;
• increased accuracy.

Steel water and gas pipes of ordinary accuracy are made from steel according to