GOST 32678-2014

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  ГОСТ 32678-2014

GOST 32678−2014 seamless steel Tubes and welded cold-deformed General-purpose. Specifications

GOST 32678−2014

INTERSTATE STANDARD

SEAMLESS STEEL TUBES AND WELDED COLD-GENERAL PURPOSE

Specifications

Seamless and welded cold deformed steel pipes for general purposes. Specifications

ISS 23.040.10

Date of introduction 2016−01−01

Preface

Goals, basic principles and basic procedure for interstate standardization established in GOST 1.0−92 «interstate standardization system. Basic provisions» and GOST 1.2−2009 «interstate standardization system. Interstate standards, rules and recommendations on interstate standardization. Rules of development, adoption, application, renewal and cancellation"

Data on standard

1 PREPARED by the Technical Committee for standardization TC 357 «Steel and cast iron pipes and cylinders», Open joint stock company «Russian scientific research Institute of pipe industry» (JSC «RosNITI»)

2 SUBMITTED by the Technical Committee for standardization TC 357 «Steel and cast iron pipes and cylinders"

3 ACCEPTED by the Interstate Council for standardization, Metrology and certification (Protocol dated June 25, 2014 N 45)

The adoption voted:

Short name of the country on MK (ISO 3166) 004−97	Country code MK (ISO 3166) 004−97	Abbreviated name of the national authority for standardization
Belarus	BY	Gosstandart Of The Republic Of Belarus
Kyrgyzstan	KG	Kyrgyzstandard
Russia	EN	Rosstandart
Tajikistan	TJ	Tajikstandart
Ukraine	UA	The Ministry Of Economic Development Of Ukraine

4 by Order of the Federal Agency for technical regulation and Metrology dated 28 October 2014 N 1449-St inter-state standard GOST 32678−2014 introduced with effect from 1 January 2016 as the national standard of the Russian Federation

5 this standard has been prepared on the basis of application of GOST R 54159−2010

6 INTRODUCED FOR THE FIRST TIME

Information about the changes to this standard is published in the annual reference index «National standards», and the text changes and amendments — in monthly information index «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in the monthly information index «National standards». Relevant information, notification and lyrics are also posted in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet

Introduction

This standard is designed instead to interstate standards GOST 8733, GOST 8734, GOST 9567 and GOST 10707 taking into account modern achievements of science, engineering and technology, advanced national experience of the manufacture and use of tubes.

Pipe manufactured according to GOST 8733, GOST 8734, GOST 9567 and GOST 10707, despite the different manufacturing methods, have the same scope as General-purpose tubes. Welded pipe because of development of modern technologies remove the outer and inner bead and the joint effects of cold deformation and heat treatment on their mechanical and technological properties are not inferior to cold-drawn seamless pipes and for precision and surface quality are superior to them. It is therefore legitimate Association of the requirements of these standards into a single standard, this standard has some significant differences:

in comparison with GOST 8734, GOST 10707 in this standard expanded the range of pipes from 4x0,2 mm to 325х24 0 mm (excluding cold-drawn welded tubes wall thickness of which is limited to 12.0 mm);

in comparison with GOST 9567 assortment of pipes is limited by the maximum size of the pipes 325х24,0 mm, since this standard applies to pipes of General purpose;

— by agreement between the manufacturer and the customer the possibility of making pipe in other sizes;

for seamless and welded cold-deformed tubes has three precision of manufacturing: normal, increased and high;

— standardized tolerances for diameter and wall thickness of seamless and welded cold-deformed tubes;

— established norms of mechanical properties of the metal pipes of steel grades 09G2S and 30KHMA when a tensile test;

— an addition was made providing for the possibility of manufacturing pipes with the holding of NDT for detection of longitudinal defects.

The standard establishes additional requirements to improve the accuracy of pipe surface quality, in particular the manufacture of pipes with polished surface, extra requirements for special finishing of pipe ends, as well as a number of other requirements.

1 Scope

This standard applies to seamless and welded cold-deformed pipes of General purpose made of carbon and alloy steels.

2 Normative references

This standard uses the regulatory references to the following standards:

GOST ISO 10332−2002* steel pressure Pipe seamless and welded (except pipe manufactured by arc welding under flux). The ultrasonic method of testing
________________
* Access to international and foreign documents referred to here and hereinafter, can be obtained by clicking on the link to the site shop.cntd.ru. — Note the manufacturer’s database.


GOST 380−2005 carbon Steel of ordinary quality. Brand

GOST 1050−88 hire gauged bars with special surface finishing of carbon structural quality steel. General specifications

GOST 2015−84 smooth unregulated Gauges. Technical requirements

GOST 2789−73 surface Roughness. Parameters and characteristics

GOST 3728−78 Pipe. Test method for bend

GOST 3845−75 Pipe metal. Test method hydraulic pressure

GOST 4543−71 rolled alloy structural steel. Specifications

GOST 6507−90 Micrometers. Specifications

GOST 7502−98 metallic measuring tape. Specifications

GOST 7565−81 Iron, steel and alloys. Sampling method for determination of chemical composition

GOST 8026−92 Line calibration. Specifications

GOST 8693−80 (ISO 8494−86) of the Pipe metal. Test method turn-up cuffs

GOST 8694−75 Pipe. The test method for distribution

GOST 8695−75 Pipe. Test method for flattening

GOST 9012−59 (ISO 410−82, ISO 6506−81) Metals. Method of measuring hardness Brinell hardness

GOST 9045−93 cold-rolled thin sheets of low carbon quality steel for cold forming. Specifications

GOST 9454−78 Metals. Test method for impact strength at low, room and elevated temperatures

GOST 10006−80 (ISO 8692−84) of the Pipe metal. Test method tensile

GOST 10692−80 Pipe steel, cast iron and fittings to them. Acceptance, marking, packing, transportation and storage

GOST 11358−89 Thickness and stenkomer indicator with a scale division of 0.01 and 0.1 mm. specifications

GOST 12344−2003 Steel alloyed and high alloy. Methods for determination of carbon

GOST 12345−2001 (ISO 671−82, ISO 4935−89) Steel alloyed and high alloy. Methods of determining sulphur

GOST 12346−78 (ISO 439−82, ISO 4829−1-86) Steel alloyed and high alloy. Methods for determination of silicon

GOST 12347−77 Steel alloyed and high alloy. Methods for determination of phosphorus

GOST 12348−78 (ISO 629−82) Steel alloyed and high alloy. Methods for determination of manganese

GOST 12349−83 Steel alloyed and high alloy. Methods for determination of tungsten

GOST 12350−78 Steel alloyed and high alloy. Methods for determination of chromium

GOST 12351−2003 (ISO 4942:1988, ISO 9647:1989) Steel alloyed and high alloy. Methods for determination of vanadium

GOST 12352−81 Steel alloyed and high alloy. Methods for determination of Nickel

GOST 12353−78 Steel alloyed and high alloy. Methods for determination of cobalt

GOST 12354−81 Steel alloyed and high alloy. Methods for determination of molybdenum

GOST 12355−78 Steel alloyed and high alloy. Methods for determination of copper

GOST 12356−81 Steel alloyed and high alloy. Method of determining titanium

GOST 12357−84 Steel alloyed and high alloy. Methods for determination of aluminium

GOST 12358−2002 Steel alloyed and high alloy. Methods for determination of arsenic

GOST 12359−99 (ISO 4945−77) Steels carbon, alloyed and high alloy. Methods for determination of nitrogen

GOST 12360−82 Steel alloyed and high alloy. Methods of boron determination

GOST 12361−2002 Steel alloyed and high alloy. Methods for determination of niobium

GOST 12362−79 Steel alloyed and high alloy. Methods for determination of trace antimony, lead, tin, zinc and cadmium

GOST 12363−79 Steel alloyed and high alloy. Methods for determination of selenium

GOST 12364−84 Steel alloyed and high alloy. Methods for the determination of cerium

GOST 12365−84 Steel alloyed and high alloy. Methods for determination of zirconium

GOST 14637−89 (ISO 4995−78) rolled plate from carbon steel of ordinary quality. Specifications

GOST 14810−69 plug Gauges smooth two-sided with inserts of diameter over 3 to 50 mm. Design and dimensions

GOST 14959−79 rolled spring carbon and alloy steel. Specifications

GOST 17410−78 nondestructive testing. The seamless cylindrical metal pipe. Methods of ultrasonic flaw detection

GOST 18360−93 Gauges-bracket sheet for diameters from 3 to 260 mm. Dimensions

GOST 18365−93 Gauges bracket sheet with changeable lips for diameters over 100 to 360 mm. Dimensions

GOST 19281−89 rolled steel with increased strength. General specifications

GOST 22536.0−87 carbon Steel and unalloyed cast iron. General requirements for methods of analysis

GOST 22536.1−88 carbon Steel and unalloyed cast iron. Methods for determination of total carbon and graphite

GOST 22536.2−87 carbon Steel and unalloyed cast iron. Methods of determining sulphur

GOST 22536.3−88 carbon Steel and unalloyed cast iron. Methods for determination of phosphorus

GOST 22536.4−88 carbon Steel and unalloyed cast iron. Methods for determination of silicon

GOST 22536.5−87 (ISO 629−82) carbon Steel and unalloyed cast iron. Methods for determination of manganese

GOST 22536.6−88 carbon Steel and unalloyed cast iron. Methods for determination of arsenic

GOST 22536.7−88 carbon Steel and unalloyed cast iron. Methods for determination of chromium

GOST 22536.8−87 carbon Steel and unalloyed cast iron. Methods for determination of copper

GOST 22536.9−88 carbon Steel and unalloyed cast iron. Methods for determination of Nickel

GOST 22536.10−88 carbon Steel and unalloyed cast iron. Methods for determination of aluminium

GOST 22536.11−87 carbon Steel and unalloyed cast iron. Method of determining titanium

GOST 22536.12−88 carbon Steel and unalloyed cast iron. Methods for determination of vanadium

GOST 26877−2008 metal Products. Methods of measuring form deviations of

GOST 28548−90 of steel Pipe. Terms and definitions

31458−2012 GOST steel Pipes products pipes. Documents on acceptance inspection

Note — When using this standard appropriate to test the effect of reference standards in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet or in the annual information index «National standards» published as on January 1 of the current year, and the editions of the monthly information index «National standards» for the current year. If the reference standard is replaced (changed), when using this standard should be guided by replacing (amended) standard. If the reference standard is cancelled without replacement, then the situation in which the given link applies to the extent that does not affect this link.

3 Terms and definitions

This standard applies the generally accepted and standard terminology according to GOST 28548, GOST 26877, as well as the terms according to [1] in respect of the surface defects.

4 Symbols and abbreviations

In this standard the following notation and abbreviations:

A, B, C, G, D, E — delivery group;

With — carbon equivalent;

D — outer diameter;

S — wall thickness;

M — weight of 1 m pipe;

, , ultimate strength, yield strength and elongation — mechanical properties of the metal, determined in the tensile test;

BKH — seamless cold drawn tubes;

CX — welded cold-deformed pipes.

5 Assortment

5.1 Types of pipes and delivery condition

Tubes are made of seamless cold-formed and welded cold.

Tubes put in a condition after heat treatment or without heat treatment.

5.2 steel grades

Tubes made from carbon and alloyed steel according to GOST 380, GOST 1050, GOST 4543, GOST 9045, GOST 14637, GOST 14959, GOST 19281.

5.3 Dimensions

Pipe manufactured by outside diameter and wall thickness dimensions shown in table 1, normal, enhanced and high-precision diameter and/or wall thickness (tables 4 and 5).

By agreement between the manufacturer and the customer pipes can be manufactured with dimensions that are not specified in table 1.

According to customer’s requirement pipe made by the inner diameter and wall thickness, inner and outer diameter, inner and outer diameter and thickness variation.

5.4 Length

The length of the pipe manufacture:

a) of random length in the range of 1.5−12.0 m;

b) measuring length in the range from 3.0 to 12.0 m;

in) dimensional length in the range from 0.2 to 12.0 m with an allowance for each cut to 5 mm if the other stock is not specified in the order.

In each batch of pipes of standard length may be no more than 5% of tubes of random length not shorter than 2.5 m.

By agreement between the manufacturer and the customer pipe lengths and dimensional length may be a length not covered in this standard.


Table 1 — outside diameter, wall thickness and theoretical weight of 1 m pipe
________________________
Theoretical weight of 1 m pipe is given for reference.

Table 1 continued

Table 1 continued

Table 1 continued

Table 1 continued

End of table 1

5.5 delivery Group

Pipe, depending on the normalized indicators, are made as of the delivery group:

And — with standard mechanical tensile properties of steel grades according to the choice of the manufacturer.

B — with standard chemical composition:

— seamless cold drawn tubes from steel according to GOST 1050, GOST 4543, GOST 14959, GOST 19281;

— welded cold-deformed pipes from steels of all degrees of deoxidation brands CT2, CT3, FT4 according to GOST 380 and GOST 14637, steels of all degrees of deoxidation grades 08, 10, 15, 20 according to GOST 1050, steel grades 08JU, 08KP according to GOST 9045 and steel grades according to GOST 19281;

In — with standard mechanical tensile properties and chemical composition:

— seamless cold drawn tubes from steel according to GOST 1050, GOST 4543, GOST 14959, GOST 19281;

— welded cold-deformed pipes from steels of all degrees of deoxidation brands CT2, CT3, FT4 according to GOST 380 and GOST 14637, steels of all degrees of deoxidation grades 08, 10, 15, 20 according to GOST 1050, steel grades 08JU, 08KP according to GOST 9045 and steel grades according to GOST 19281;

G — standard chemical composition of steel grades according to GOST 1050, GOST 4543, GOST 14959, GOST 19281 and mechanical properties that are controlled on cured samples, in accordance with the requirements of the relevant standards for steel;

D — with standard hydrostatic test pressure, without standardization of mechanical properties and chemical composition;

E — with the chemical composition of the steel, not provided for pipes delivery groups B, C and d, and norms of mechanical properties are set by agreement between the manufacturer and the customer.

5.6 legend of pipes

______________________
* In the original paper the name of paragraph 5.6 are shown in italics. — Note the manufacturer’s database.

Examples of symbols:

1 welded cold-drawn Pipe outer diameter 57 mm regular accuracy of manufacturing, wall thickness 3.5 mm regular accuracy of manufacturing, off-gage length, a delivery group And GOST:

Pipe — SKH — 57X3,5 — A — GOST

2 seamless cold-worked Tubes of an external diameter of 60 mm high precision manufacturing, inner diameter 54 mm high-precision manufacturing, random length, steel 10, group B deliveries GOST:

Pipe — BKH — 60п x вн54п — 10 — B — GOST

3 seamless cold-deformed Pipes, of an external diameter of 41 mm high-precision, wall thickness 1.2 mm high-precision manufacturing, measuring the length of 6000 mm, of steel grade 10, a delivery group In GOST:

Pipe — BKH — 41B x 1.2 x 6000 — 10 — b — GOST

4 Pipes welded, cold-formed, internal diameter 45 mm high precision manufacturing, wall thickness 2.0 mm normal precision manufacturing, measuring length 5000 mm, of steel grade 09G2S, delivery group G GOST:

Pipe — CX — вн45в x 2,0 x 5000 — 09G2S — G — GOST

5 cold-drawn welded Pipes, external diameter 60 mm of conventional precision manufacturing, inner diameter 50 mm normal precision manufacturing, with standard wall thickness of 5.0 mm, a length in multiples of 1250 mm, a delivery group D GOST:

Pipe — CX — 60 x вн50 x 5,0 x 1250кр — D — GOST

5.7 the Information provided in the order

5.7.1 When ordering the customer must specify the following required information:

1) designation of this standard;

2) types of pipes: seamless, cold-formed or cold-drawn welded (5.1);

3) steel grade (for pipes of delivery groups B, C and d) (5.2; 5.5);

4) pipe sizes (5.3, table 1);

5) the manufacturing precision of pipe sizes (5.3, tables 4 and 5);

6) the length of the tubes (5.4, table 6);

7) the supply pipe (5.5);

8) norms of mechanical properties of tubes in tension (pipe group supplies and pipes of steel grades according to GOST 19281 delivery group D) (5.5; 6.3.1; 6.3.4);

9) hydrostatic test pressure (pipe delivery group D) (5.5; 6.7.2);

10) steel chemical composition and mechanical properties of the pipe (pipe group supplies E) (5.5; 6.2.4; 6.3.4).

5.7.2 If necessary, the customer may specify in the order the following additional requirements:

1) manufacturing of pipes internal diameter and wall thickness (5.3; 6.5.1.2);

2) the manufacture of pipes inner and outer diameter (5.3; 6.5.1.2);

3) production of pipes inner and outer diameter and thickness variation (5.3; 6.5.1.3);

4) carrying out heat treatment of the tubes in furnaces with protective atmosphere (6.1.2.3);

5) normal hardness of the metal pipes of the delivery groups A, B, and (6.3.6);

6) carrying out technological tests of tubes of the delivery group In specifying the types of tests (6.4);

7) manufacturing of welded cold-drawn pipes, ovality and thickness variation not exceeding 0,8 total field limit deviation for diameter and wall thickness (6.5.3.1);

8) supply of heat treated pipe with the deviation from straightness over the entire length of not more than 0.2% of the length (6.5.3.2);

9) supply of heat treated pipes, cleaned from scale (6.6.5);

10) the manufacture of pipes with chamfer (6.8.2);

11) supply pipes without cutting off the ends (6.8.4);

12) production of steel pipes one of melting (8.1.2);

13) registration of the instrument of acceptance inspection, not covered by this standard (8.1.6);

5.7.3 If necessary between the manufacturer and the customer can be agreed and specified in the order, the following additional requirements:

1) manufacturer of pipe sizes not specified in this standard (5.3; 6.5.1.1);

2) the manufacture of pipe lengths and dimensional length, not specified in this standard (5.4; 6.5.2.1);

3) supply pipes with the ratio of diameter to wall thickness D/S is less than 50 without carrying out a heat treatment and conducting heat treatment of the tubes with relation D/S, is 50 and over (6.1.2.1);

4) heat treatment of a special type and/or mode (6.1.2.2).

5) requirements for the chemical composition of the metal pipes of the delivery groups A, B, C, D and e are not covered by this standard (6.2.3);

6) the value of carbon equivalent (6.2.5);

7) rules of temporary resistance , yield strength , relative elongationfor tubes in a delivery group, produced without heat treatment (6.3.1);

8) standards , for pipe delivery group In diameters up to 10 mm, inclusive of steel grade 08JU [table 2, footnote 1)];

9) rules and for pipes of group delivery of steel grade 09G2S [table 2, footnote 2)];

10) norms and pipe delivery group In of steel 30KHMA [table 2, footnote 3)];

11) rules that , for pipes of group delivery of steel grades not listed in table 2 (table 2, note);

12) rate the toughness of heat-treated pipes of the delivery groups A and b with a diameter of 25 mm and a wall thickness of 3 mm or more (6.3.7);

13) limit deviation of outside diameter of heat treated tubes increased and high precision manufacturing with the ratio D/Sequal to 50 or more [table 4, footnote 1)];

14) maximum deviations of the internal diameter of the pipe internal diameter of 10 mm and less [6.5.1.2, enum b)];

15) limit deviation of the outer and inner diameters and thickness variation in the manufacture of pipes inner and outer diameter and thickness variation (6.5.1.3);

16) limit deviation of the outer and inner diameters and wall thickness of pipes is not covered by this standard (6.5.1.4);

17) limit deviations of the length of the measuring pipe lengths and lengths of dimensional length, not covered by this standard, and increased the allowance for each cut to dimensional length (6.5.2.2);

18) requirements for straight pipe not covered by this standard (6.5.3.2);

19) the manufacture of pipes with a polished outer surface (6.6.6);

20) the manufacture of pipes with standard of surface roughness (6.6.7);

21) manufacture of tubes with the requirements for surface quality, are not covered by this standard (6.6.8);

22) test tubes delivery groups C and D, and pipes of the delivery groups A and E (in the case of regulation of temporary resistance) hydrostatic pressure in excess of the estimated and/or more than 20 MPa (6.7.3);

23) carrying out the testing of metals non-destructive methods, replacement of the hydrostatic test (6.7.4);

24) carrying out testing for detection of longitudinal defects by nondestructive methods (6.7.5);

25) fabrication beveling special shape and size of the ends of tubes with wall thickness of 5.0 mm and more (6.8.3);

26) mark with paint all the pipes in the supply pipes without trimming and deburring (6.8.4);

27) the application of additional markings on pipe (6.9.2);

28) delivery of pipes with safety fittings on the ends (6.9.3);

29) the application of temporary conservation cover (6.9.4);

30) delivery tubes in a special package (6.9.5);

31) carrying out the testing of metals non-destructive method according to GOST ISO 10332 replacing hydrostatic tests for pipe diameters 168.3 mm or less with the ratio D/S is less than 5 (8.2.21);

32) conduction of non-destructive testing of metal to detect longitudinal defects according to GOST ISO 10332 pipes with a diameter of 168.3 mm or less with the ratio D/S is less than 5 (8.2.22).

33) carrying out non-destructive testing of metal to detect longitudinal defects in pipes with a level of acceptance not stipulated in this standard (8.2.22).

6 Technical requirements

6.1 Method of production

6.1.1 Formation and deformation

Seamless cold drawn tubes are manufactured by hot deformation with subsequent cold deformation.

Welded cold drawn pipe manufacture welding process with subsequent cold deformation.

6.1.2 Heat treatment

6.1.2.1 the Tubes with relation D/S less than 50 supplied in heat treated condition.

The tubes with relation D/Sequal to 50 or more, delivered without heat treatment.

By agreement between manufacturer and customer tubes with relation D/S less than 50 supply without heat treatment, the tubes with relation D/S, equal and more than 50 in the heat-treated condition.

6.1.2.2 the type and mode of heat treatment chosen by the manufacturer subject to the requirements of this standard, if agreed between manufacturer and customer has not agreed to conduct heat treatment and/or mode.

6.1.2.3 According to customer’s requirement supply pipe heat treated in furnaces with protective atmosphere.

6.2 Chemical composition

6.2.1 Chemical composition the pipe of the delivery groups B, C and d must meet the specified vhost 380, GOST 1050, GOST 4543, GOST 9045, GOST 14637, GOST 14959, GOST 19281.

6.2.2 Chemical composition of tubes of the delivery groups A and D is not regulated.

6.2.3 as agreed between the manufacturer and the customer may be set more stringent requirements on the chemical composition of metal for pipes delivery groups B, C and G or additional requirements for pipe delivery groups A and D.

6.2.4 Chemical composition of pipes delivery group E determined by agreement between the manufacturer and the customer.

6.2.5 by agreement between the manufacturer and the customer the value of the carbon equivalent With thecalculated according to the following formula, should not exceed agreed values

With= With+MP/6, (2)

where With, Mn — mass fraction of carbon and manganese, %.

6.3 Mechanical properties

6.3.1 tensile strength, yield strength, elongation, hardness pipe group supplies And shall be as specified by the customer.

6.3.2 tensile strength, yield strength and elongation thermally treated tubes In delivery group should correspond to those in table 2.

In the supply pipes without heat treatment delivery group In norms of mechanical properties determined by agreement between the manufacturer and the customer.

In the absence of such coordination, the mechanical properties of welded cold-drawn tubing shall comply with the following:

— tensile strength  — not less than 315 N/mm;

— yield strength  — not less than 216 N/mm;

— elongation  — not less than 5%.


Table 2 — Mechanical properties of pipes

Steel grade	Tensile strength, N/mm	Yield strength , N/mm	Elongation , %	Brinell hardness number NV, not more than
not less than
08KP	294	175	27	-
08, 08ps,	314	196	25	-
10kp
10ps,	333	206	25	-
15kp,
St2sp, St2ps, St2kp,
ВСт2сп, ВСт2пс, ВСт2кп
10	353	216	24	137
15, 15ps,	372	225	22	-
20kp,
St3sp, St3ps,
St3kp
20, 20ps,	412	245	21	156
St4sp, St4ps, St4kp
08JU	255	174	30	-
35	510	294	17	187
45	589	323	14	207
09G2S	470	265	21	-
10G2	422	245	22	197
15X	412	-	19	179
20X	431	-	17	179
40X	618	-	14	217
30KHGSA	491	-	18	229
15KHM	431	226	21	-
30KHMA	588	392	13	-
By agreement between the manufacturer and the customer is welded cold-drawn pipe outer diameter up to 10 mm inclusive manufactured from not less than 275 N/mmand not less than 35%. By agreement between manufacturer and customer tubes produce no less than 441 N/mmand not less than 245 N/mm. By agreement between the manufacturer and the customer pipe is manufactured with no less than 491 N/mmand not less than 294 N/mm. Note — For steel grades not listed in this table, the mechanical properties determined by agreement between the manufacturer and the customer.

6.3.3 tensile strength, yield strength and elongation of the pipes of delivery groups B and D are not standardized.

6.3.4 tensile strength, yield strength and elongation pipes delivery group G normalized by the heat-treated samples and must meet the requirements of the relevant standards for steel.

6.3.5 Mechanical properties of the tube delivery group E determined by agreement between the manufacturer and the customer.

6.3.6 According to customer’s requirement heat-treated pipe delivery groups A, B and a wall thickness of 10.0 mm and more are manufactured with standard metal hardness. For pipe delivery groups A and B hardness shall be as defined by the customer, for pipes delivery group In — set out in table 2.

6.3.7 by agreement between the manufacturer and the customer heat treated pipe delivery groups, and an outer diameter of 25 mm and a wall thickness of 3.0 mm and more are made with standard toughness. The norm of toughness, the kind of sample to test and the temperature test is determined by agreement between the manufacturer and the customer.

6.4 Technological properties

Heat-treated pipe group supplies To must maintain the following technological tests listed in table 3:

a) welded cold drawn tubes from steel grades 08, 08JU, 10, 15, ST2, 20, ft3, FT4, 09G2S, 10G2 — test for the flattening; on the customer’s request optional — one or more tests: a bend, on the hand or on turn-up cuffs;

b) seamless cold drawn tubes of steel grades 10, 20, 10G2, 15HM, 09G2S at the customer’s request one or more tests: flattening, bend, on the hand or on turn-up cuffs.


Table 3 — Types of technological tests of tubes

Type of test	The pipes	External diameter, mm	Wall thickness, mm
Bend	BKH, SKH	Any	Any
Distribution	BKH, SKH	Not more than 150	Not more than 9.0
Flattening	BKH	At least 20	Not more than 10.0 but not more than 15% D
CX	Any	Not more than 15% D
Turn-up cuffs	BKH	From 25 to 160 a incl.	Not more than:
10% D — to D to 60 mm incl.,
8% D — to D over 60 to 108 mm incl.,
6% D — to D St. 108 to 140 mm incl.,
5% D — to D St. 140 to 160 mm incl.
CX	From 25 to 160 a incl.	Any

6.5 maximum deviations of diameter, wall thickness, length and geometric tolerances

6.5.1 maximum deviations of diameter and wall thickness

6.5.1.1 maximum rejections of sizes of pipes shall not exceed that specified in tables 4 and 5 for a given precision of manufacture.


Table 4 — Limit deviations of the outside diameter

The outer diameter D, mm	Maximum deviation in precision manufacturing
normal	high	high
To 10 incl.	±0.15 mm	±0.10 mm	-
SV. 10 to 20 incl.	±0.30 mm	±0,12 mm	±0.10 mm
SV. 20 to 30 incl.	±0.30 mm	±0.15 mm	±0.10 mm
SV. 30 to 40 incl.	±0.40 mm	±0.20 mm	±0.15 mm
SV. 40 to 50 incl.	±0.40 mm	±0.25 mm	±0.20 mm
SV. 50 to 60 incl.	±0,80%	±0,60%	±0.25 mm
SV. 60 to 70 incl.	±0.30 mm
SV. 70 to 80 incl.	±0.35 mm
SV. 80 to 90 incl.	±0.40 mm
SV. 90 to 110 incl.	±0.45 mm
SV. 110 to 130 incl.	±0.55 mm
SV. 130	±0,75%	-
Limit deviation heat-treated tubes with relation D/Sequal to 50 or more, must be agreed between manufacturer and customer.

Table 5 — Limit deviations in wall thickness of tubes

Wall thickness S, mm	Maximum deviation in precision manufacturing
normal	high	high
With the diameter up to 110 mm
And 1.0 incl.	±0,12 mm	±0.10 mm	±0.05 mm
SV. 1.0−5.0 incl.	±10,0%	±8,0%	±7.5% of
SV. 5.0 to 2.5 incl.	±8,0%	±7.5% of	±6,0%
With a diameter of 110 mm and more
Up to 2.5 incl.	±12,0%	±10,0%	-
SV. 2.5 to 5.0 incl.	±10,0%	±8,5%	-
SV. 5,0	±8,0%	±7.5% of	-
For tubes with relation D/S from 4 to 10 places of Stripping defects allowed wall thinning to minus 8% of nominal wall thickness.

6.5.1.2 in the manufacture of pipes internal diameter and wall thickness or inner and outer diameter, the maximum deviations of the internal diameter of the pipes must not exceed:

a) for tubes with inner diameter more than 10 mm — marginal variances equal to the outer diameter listed in table 4 for a given precision of manufacture;

b) for pipe internal diameter of 10 mm and less — extreme deviations agreed between the manufacturer and the customer.

6.5.1.3 in the manufacture of pipes inner and outer diameter and thickness limit deviation of the outer and inner diameters and thickness variation must be agreed between manufacturer and customer.

6.5.1.4 By agreement between manufacturer and customer can be set different tolerances for inner and outer diameter and wall thickness pipes.

6.5.2 Limit deviations of length

6.5.2.1 Limit deviations of length of pipes lengths and dimensional length should not exceed specified in table 6.


Table 6 — Limit deviations of the length of the pipes

Measuring length, m	Limit deviation, mm, in outer diameter, mm
to 168 incl.	St. 168
To 6.0 incl.	+10	+15
SV. Of 6.0 to 12.0 incl.	+15	+15
SV. 12,0	+25	+25

6.5.2.2 by agreement between the manufacturer and the customer pipe lengths and dimensional length, manufactured with a reduced or increased limit deviations of length and tube length that is a multiple dimensional — with an increased allowance for each cut.

6.5.3 geometric tolerances

6.5.3.1 Ovality and thickness variation should not print the diameter and wall thickness of pipes for limit values for a given precision of manufacture.

At the request of the customer ovality and thickness variation of the welded cold-drawn pipes shall not exceed 0.8 total field limit deviation for diameter and wall thickness, respectively.

6.5.3.2 the Deviation from straightness of thermally treated tubes at any section of 1 m length should not exceed:

— for pipes with external diameter up to 8 mm inclusive, 3 mm;

— for pipes with external diameter more than 8 to 10 mm inclusive, 2 mm;

— for pipes with external diameter over 10 mm to 1.5 mm.

The deviation from straightness of tubes in the condition without heat treatment is not standardized.

According to customer demand deviation from straightness over the entire length of the heat-treated pipe shall not exceed 0.2% of the length.

By agreement between manufacturer and customer can be established other requirements for straight pipe.

6.6 surface Quality

6.6.1 On the surface of the pipe are not allowed cracks, slivers, flaws, shells and sunsets.

On the surface of pipes, heat treated in furnaces with protective atmosphere are not permitted scale or traces of loose scale.

6.6.2 the pipe surface allowed without Stripping some imperfections: dents, risks, tracks changes, rabiza, scale (traces of scale) that does not hinder visual inspection and the traces of the Stripping of surface imperfections, if they cannot make the pipe sizes for the permissible minimum value.

On the surface of the thermally treated tubes are allowed traces of loose scale and technological lubrication, preventing the surface quality control.

To pipe surface without heat treatment allowed a thin layer of lubrication technology, do not interfere with the control of surface quality.

On the surface of pipes, heat treated in furnaces with protective atmosphere, allowed the presence of thin oxide films and oxide tint.

6.6.3 remove imperfections of the surface by etching, the solid abrasive cleansing provided that they do not derive the diameter and wall thickness for valid minimum value.

Remove local imperfections of the surface with abrasive cleansing provided that it does not display wall thickness beyond the permissible minimum value. The local sweep should move smoothly into the adjacent surface of the pipe. Traces of Stripping the surface of the ground pipes must be processed to roughness of the contiguous surfaces of the pipe.

The repair of pipes by welding is not allowed. Allowed repair by welding of weld seams prior to the holding of heat treatment and cold deformation.

6.6.4 On the outer surface of welded cold-deformed tubes grat is not allowed. On the inner surface of the pipe allowed the remnants of the Burr height of 0.3 mm.

6.6.5 According to customer demand the surface of the thermally treated pipe (excluding pipes heat treated in furnaces with protective atmosphere) should be cleaned from scale.

6.6.6 According to the agreement between the manufacturer and the customer pipe is manufactured with a polished outer surface.

6.6.7 by agreement between the manufacturer and the customer pipe is manufactured with standard surface roughness.

6.6.8 by agreement between the manufacturer and the customer pipe is manufactured with additional requirements to the surface quality.

6.7 the Continuity of metal

6.7.1 Pipe delivery group and delivery groups A and E (in the case of regulation of temporary resistance) to withstand the hydrostatic test pressure is calculated according to the formula given in GOST 3845, when permitted by the tension in the pipe wall equal to 40% strength for a specified grade of steel, but not greater than 20 MPa.

The manufacturer may guarantee the ability of seamless cold-deformed tubes to withstand the test pressure without hydrostatic testing. The ability of pipe to withstand hydrostatic test pressure is provided by the technology of production of seamless cold-deformed pipes.

Instead of testing hydrostatic pressure welded cold-deformed tubes manufacturer can conduct testing of metal pipe using non-destructive methods.

6.7.2 Pipe-delivery group D shall withstand hydrostatic test pressure specified by the customer, but not exceeding 20 MPa.

6.7.3 by agreement between the manufacturer and the customer heat treated pipe delivery groups C and D, and the tubes of the delivery groups A and E (in the case of regulation of temporary resistance) can be tested by hydrostatic pressure than the design and/or more than 20 MPa.

6.7.4 By agreement between manufacturer and customer the pipe must undergo testing of metals non-destructive methods that replace the hydrostatic test.

6.7.5 By agreement between manufacturer and customer the pipe must undergo testing for detection of longitudinal defects by nondestructive methods.

6.8 Finishing of pipe ends

6.8.1 pipe Ends should be square-cut and cleaned of burrs. When deburring allowed the formation of the chamfer.

6.8.2 At the request of the customer at the ends of the pipes with wall thickness of 5.0 mm and more must be done external chamfer at an angle of 35°+5° to-end pipe with end ring width of from 1 to 3 mm To ensure that the width of the end rings allowed the formation of the inner chamfer.

6.8.3 by agreement between the manufacturer and the purchaser at the ends of the pipes with wall thickness of 5.0 mm or more can be performed chamfer special shapes and sizes.

6.8.4 On the customer’s request pipes can be supplied without trim the ends and deburring. By agreement between the manufacturer and the customer portions of the ends of the tubes cut during the finishing of the pipe ends, mark with paint and do not include the length of the pipe.

6.9 Labelling and packaging

6.9.1 General requirements for marking and packaging of pipes should correspond to GOST 10692.

6.9.2 by agreement between the manufacturer and the customer’s pipe can be marked with additional markings.

6.9.3 by agreement between the manufacturer and customer ends of each pipe shall be tightly closed with the safety parts (plugs, stoppers, caps).

6.9.4 by agreement between the manufacturer and the customer pipes shall have a temporary preservative or coating must be Packed in materials with volatile corrosion inhibitor to protect the pipe surface from corrosion for the period of transportation and storage of OCTG, provided transportation covered trucks and stored in dry (which is allowed in an unheated) premises not more than 6 months.

6.9.5 By agreement between manufacturer and customer can be made special packing tubes.

7 safety Requirements and environmental protection

Pipes, safety parts, preservative coatings and materials fire-proof, explosion-proof, elektrobezopasen, non-toxic, do not represent a radiation hazard and do not provide harm to the environment and human health during test, storage, transportation, operation and disposal.

8 Rules of acceptance and test methods

8.1 acceptance Rules

8.1.1 Pipe take parties.

The party should consist of pipes of the same diameter and wall thickness, made of steel one brand, one group of supplies, one method of manufacturing one form of heat treatment (thermally treated tubes).

8.1.2 At the request of the customer party shall consist of pipes made of steel in one heat.

8.1.3 the Number of pipes in the lot shall be not more than specified in table 7.


Table 7 — Number of pipes in the party

The pipes	The size of the pipes, mm	The number of tubes in the party, pieces, not more
Seamless cold	Outer diameter up to 76 incl.	600
Wall thickness up to 2.5 incl.
Outer diameter — 76 St.	300
Wall thickness over 2,5
Welded cold	Outer diameter — up to 30 switches.	1000
Outer diameter is over 30 to 76 incl.	400
Outer diameter — 76 St.	250

8.1.4 To check the conformity of the pipes with the requirements of this standard, the manufacturer conducts routine testing.

The status of testing, type of testing or monitoring standards selection of pipes from the party or briefs and sample from each selected pipe shall be as specified in table 8.

8.1.5 Upon receipt of unsatisfactory results at least in one sample tests for him to repeat the test at twice the sample from the same batch, except for tubes that fail the test. Satisfactory results of re tests spread to the entire party.


Table 8 — Types of inspection and testing, selection norms

The status of the test	Kind of test or control	Rule selection of pipes from the party	The rate of sampling from each selected pipe
Mandatory	Control of the chemical composition of tubes of the delivery groups B, C, d and E	1	-
Tensile test of tubes of the delivery groups A, b and G	2	1
Test for collapsed pipes CX delivery group In	2	1
Control of diameter, wall thickness	100%	-
Control length		-
Control ovality, thickness, straightness
Balance control inner bead tubes CX
Control of finishing the ends of pipes
Visual inspection of surface quality	100%	-
Hydrostatic testing of pipes delivery groups A, b, D and E	100%	-
Additional	Control of the chemical composition of tubes of the delivery groups A and D	1	-
Control of carbon equivalent	1	-
Tensile test tubes delivery group E	2	1
Hardness control pipe delivery groups A, B, C and E	Two	1
Impact test the pipe bend of the delivery groups A, b and E	2	3
Test bend, the hand or the turn-up cuffs tubes CX delivery group In	2	1 sample for each test
Test bend, the distribution, turn-up cuffs or collapsed pipes BKH delivery group In	2	1 sample for each test
Control of geometrical parameters of the chamfer		-
Control of surface roughness		-
Testing by nondestructive methods, replacing hydrostatic testing	100%	-
Testing for detection of longitudinal defects by nondestructive methods	100%	-
Allowed acceptance of the chemical composition according to steel manufacturer. According to the technical documentation of the manufacturer. For pipes of BH allowed guarantee, for tubes CX — replacement non-destructive testing of at least 10% of the pipes of the party.

Upon receipt of unsatisfactory results, re-testing is permitted testing of all pipes of the party with the exception of the pipes, not stand the test.

Allowed to expose the batch of pipes processing and to present it for acceptance as a new party.

8.1.6 adopted On the shipment of pipes issue a certificate of acceptance inspection «3.1» according to GOST 31458.

At the request of the customer issue other documents on acceptance inspection according to GOST 31458.

8.2 Methods of inspection and testing

8.2.1 the Chemical composition of steel determined by chemical analysis according to GOST 12344 -12365 GOST, GOST 22536.0 to GOST 22536.12. Samples are taken according to GOST 7565.

Allowed to apply other methods of analysis, providing the necessary accuracy corresponding to the specified standards.

The differences in the evaluation of the chemical composition of the used methods of chemical analysis.

8.2.2 tensile Test is carried out according to GOST 10006 longitudinal samples.

It is allowed to conduct testing by NDT methods according to the normative documents. The differences in the evaluation of test results carried out according to GOST 10006.

8.2.3 Control of hardness is carried out according to GOST 9012. Allowed to control the hardness of the specimens intended for the tensile test.

Allowed to control hardness non-destructive methods according to the normative documents. The differences in the evaluation of the results of the monitoring carried out in the churchyard 9012.

8.2.4 Test for impact strength is carried out according to GOST 9454.

Impact toughness is defined as the arithmetic mean value of the results of tests of three samples. On one sample may reduce the toughness of not more than 30% of the value agreed upon between manufacturer and customer.

8.2.5 Test flattening is carried out according to GOST 8695 to obtain sludinajumi surfaces between the distance N, mm, calculated according to the following formula

, (3)

where With — coefficient taking into account the ratio of yield strength to ultimate strength equal to:

— 0,09 — welded cold-deformed tubes from steel grades 08, ST2 and 08JU;

— 0,08 — for the rest of the pipes.

If the weld is visually undetectable, the position of the sample during the test is chosen randomly.

Allowed prior removal of the surface layer of the sample (inner and outer) to a depth of not more than 0.2 mm.

8.2.6 Test bend is carried out according to GOST 3728.

8.2.7 Test distribution is carried out according to GOST 8694.

The test is carried out:

— on the mandrel taper 1:10 — for seamless cold-deformed tubes;

— on the mandrel, taper 30° — welded cold-deformed pipes.

The distribution is carried out to increase the outer diameter of the pipes given in table 9.


Table 9 — Increase in the outer diameter in the distribution pipes

Steel grade	The increase in external diameter of a pipe, %, wall thickness, mm
to 5.0 incl.	St. 5,0
Seamless cold-deformed pipes
10	10	6
20, 15KHM, 09G2S, 10G2	8	5
Tubes welded cold
08, 08JU	12	8
10, 15, ST2	10	6
20, Ft3, FT4	8	5
09G2S, 10G2	7	4

8.2.8 Test turn-up cuffs is carried out according to GOST 8693.

The amount of flanging shall not be less than 24%, the width of the bent side, measured from the inner surface of the pipe shall not be less than 1.5S.

The angle of the flanging shall be:

— 60° — for seamless cold-deformed pipes made of steel grades 20, 15KHM, 10G2, 09G2S;

— 90° — for seamless cold-deformed pipes of steel grade 10 and welded cold-deformed pipes.

8.2.9 the Outer diameter of the tubes control the smooth micrometer according to GOST 6507, sheet clamps according to GOST and GOST 18360 18365.

8.2.10 Inner diameter to a caliber control tube according to GOST 14810 or caliber according to GOST 2015.

8.2.11 the wall Thickness of the pipe is measured with a micrometer according to GOST 6507 or indicator stenkomer according to GOST 11358.

Wall thickness welded cold-deformed tubes is measured at a distance of not less than 2S from the weld.

8.2.12 the thickness variation is determined according to GOST 26877.

8.2.13 the inner Burr is defined as the difference between the wall thickness at the location of the weld and the wall thickness in the HAZ.

8.2.14 Ovality of pipes is determined according to GOST 26877.

8.2.15 the Deviation from straightness of a pipe segment with a length of 1 m is measured with a straight edge according to GOST 8026 and a set of probes according to the normative document.

The deviation from straightness over the entire length of the pipe is determined according to GOST 26877.

8.2.16 Control the length of the pipes is carried out measuring tape according to GOST 7502.

8.2.17 control the geometric parameters of the chamfer is carried out according to the method of the manufacturer.

8.2.18 allowed to control the size and shape of the pipe by other methods and means of measurement, metrological characteristics which provide the required measurement accuracy.

The differences in the evaluation of the measurement results is carried out in accordance with 8.2.9−8.2.17.

8.2.19 the surface quality of the pipes is controlled visually without the use of magnifying devices.

The depth of the defects is determined by normative documents of the manufacturer.

The surface roughness of the pipe is determined in accordance with GOST 2789 according to the normative documents of the manufacturer.

8.2.20 Hydrostatic testing of pipes is carried out according to GOST 3845 with time under pressure of not less than 10 s.

8.2.21 non-destructive testing, replacement of the hydrostatic testing carried out according to GOST ISO 10332 for pipes with a diameter of 168.3 mm or more with the ratio D/S is not less than 5 or [2].

By agreement between manufacturer and customer testing, which replaces hydrostatic tests for pipe diameters 168.3 mm or less with the ratio D/Sof less than 5 carried out according to GOST ISO 10332.

8.2.22 non-destructive testing for detection of longitudinal defects in pipes is carried out according to the choice of the manufacturer one or more of the following methods:

— eddy in [3] with the level of acceptance E4;

scattering of the magnetic flux according to the standard [4] with the acceptance level F4;

— ultrasonic GOST 17410 configuration standard sample with artificial reflectors in the form of a longitudinal rectangular risks with depth of 12.5% of the wall thickness or [5] with the acceptance level U4 for seamless cold-deformed tubes;

— ultrasonic GOST ISO 10332 for welding cold-deformed pipes with a diameter of 168.3 mm or more with the ratio D/S is not less than 5.

By agreement between manufacturer and customer testing for detection of longitudinal defects according to GOST ISO 10332 can be used for pipes with a diameter of 168.3 mm or less with the ratio D/S is less than 5.

By agreement between manufacturer and customer testing for detection of longitudinal defects in pipes is carried out with a level of acceptance not stipulated in this standard.

9 Transportation and storage

9.1 Transportation and storage of pipes is carried out in accordance with trebovaniyami 10692.

9.2 According to customer’s requirement transportation of pipes is carried out by a covered transport.

10 manufacturer’s Warranty

The manufacturer guarantees the conformity of the pipes with the requirements of this standard, subject to the rules and regulations transportation and storage of pipes and compliance with operating conditions the purpose of the pipes.