GOST R ISO 9329-4-2010
— yield point (with a total elongation of 1.0%) on
;
— the elongation after break on
.
1 area of use
This standard applies to seamless round cross-section pipes made of austenitic high-alloy steels.
Pipes are designed to work under pressure in conditions of exposure to corrosive media at room, low or elevated temperatures, for example in high-pressure installations, chemical plants, steam generators and pipeline systems.
Pipes manufactured in accordance with this standard can meet various requirements for properties at room temperature, toughness at low temperatures and yield strength at elevated temperatures, depending on the purpose and operating conditions.
Users of this standard must also take into account the requirements of ISO 1129, ISO 2037, ISO 6759, ISO 7598. Pipes for boilers and pressure vessels shall comply with the requirements of ISO / R 831 and ISO 5730.
Notes
1 The term «tube» is synonymous with «pipe»; In the national pipe industry, the term «pipe» is used in both cases.
2 This standard can be applied to pipes of another (non-circular) cross-section. In this case, the requirements for the chemical composition and mechanical properties of the pipes of this standard should be applied. The remaining requirements must be agreed between the manufacturer and the customer.
This standard does not apply to:
a) casing, tubing, drill pipes and pipes for oil and gas industry pipelines;
(b) pipes for the transport of gas, water and sewage.
ISO 3651−1: 1976 Stainless steels. Determination of resistance to intergranular corrosion. Part 1. Austenitic and ferritic-austenitic (duplex) stainless steels. Corrosion test in nitric acid by measuring the loss of mass (Hugh method) [ISO 3651−1: 1976, Determination of resistance to intergranular corrosion of stainless steels — Part 1: Austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in nitric acid medium by measurement of loss in mass (Huey test)] *
_______________
* ISO 3651−1: 1998 «Stainless steels — Determination of resistance to intergranular corrosion — Part 1: Austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in nitric acid by measuring the loss of mass (Hugh method)».
ISO 3651−2: 1976 Stainless steels. Determination of resistance to intergranular corrosion. Part 2. Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels. Corrosion test in a medium containing sulfuric acid (Strauss method) [ISO 3651−2: 1976, Determination of resistance to intergranular corrosion of stainless steels — Part 2: Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in media containing sulfuric acid (Strauss test)] *
_______________
* ISO 3651−2: 1998 «Stainless steels — Determination of resistance to intergranular corrosion — Part 2: Ferritic, austenitic and ferritic-austenitic (duplex) stainless steels — Corrosion test in a medium containing sulfuric acid (Strauss method)».
ISO 4200: 1991 Pipes steel with smooth ends, welded and seamless. General tables of sizes and masses per unit length (ISO 4200: 1991, Plain end steel tubes, welded and seamless — General tables of dimensions and masses per unit length)
ISO / TO 4949: 1989 Steel designations based on letter symbols (ISO / TR 4949: 1989, Steel names based on letter symbols) *
_______________
* ISO 4949: 2003 «Names of steel based on alphabetic characters».
ISO 5252: 1991 Steel pipes. Tolerance systems (ISO 5252: 1991, Steel tubes — Tolerance systems)
ISO 5730: 1992 Stationary boilers with smoke tubes of welded construction (other than water tube boilers) [ISO 5730: 1992, Stationary shell boilers of welded construction (other than water-tube boilers)] *
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* Canceled without replacement.
ISO 6759: 1980 Stainless steel seamless pipes for heat exchangers (ISO 6759: 1980, Seamless steel tubes for heat exchangers)
ISO 6761: 1981 Steel pipes. Cutting ends of pipes and fittings for welding (ISO 6761: 1981, Steel tubes — Preparation of ends of tubes and fitting for welding)
ISO 6892−1: 1984 Metallic materials. Tensile test at ambient temperature (ISO 6892−1: 1984, Metallic materials — Tensile testing) *
_______________
* ISO 6892−1: 2009 «Metallic materials — Tensile test — Part 1: Test at ambient temperature».
ISO 7438: 1985 Metallic materials. Bending test (ISO 7438: 1985, Metallic materials — Bend test) *
_______________
* ISO 7438: 2005 «Metallic Materials — Bending Tests».
3 Notations
3.1 Designations of pipe sizes — outside diameter;
wall thickness.
3.2 Designations for pipe size deviations
The designations for the limiting deviations in pipe dimensions correspond to the notations adopted in ISO 5252.
3.3. Designations used in the description of tests
3.3.1. The designations used to describe the tensile test are according to ISO 6892.
3.3.2. Designations used to describe the flattening test: — the distance between the flattening surfaces;
coefficient of deformation.
3.3.3. Designations used to describe the hydrostatic pressure test:
— allowable stress in the pipe wall during the test.
4 Information provided by the customer
4.1 Mandatory information
In order for tubes, the customer must specify:
— product name — pipe;
— designation of the standard for dimensions;
— Dimensions (outer diameter and wall thickness or, if agreed between the manufacturer and the customer, inner diameter and wall thickness) in millimeters (7.1);
— the length (7.2);
— limit deviations of length for pipes of dimensional length exceeding 12 m (7.3.2);
— designation of this standard;
— steel grade (table 1);
— the test category (9.2);
— type of acceptance inspection document (9.1 and section 12).
4.2 Additional Information
In the order for pipes supplied in accordance with the requirements of this standard, the customer can specify the following additional requirements, having previously agreed with the manufacturer:
— method of steel smelting (5.1);
— heat treatment during the hot deformation of pipes [5.3.1, enumeration b)];
— special limit deviations of the outer diameter and wall thickness (other than those specified in Tables 5 and 6);
— testing of mechanical properties on specimens thermally treated according to a special regime (6.2.1);
— chamfering at the ends of the pipes (8.2);
— special requirements for the straightness of the pipes (8.1.7);
— type of surface (8.1.1 and table 7);
— control of the chemical composition of the pipes (9.3);
— determination of yield point at elevated temperature, yield stress, sampling rate and test temperature (9.4.2);
— hydrostatic test of continuity (9.5);
— impact test at room temperature (9.9.5.1);
— impact bending test at reduced temperature (9.4.3 and
— special labeling requirements (10.3);
— Nondestructive testing to detect transverse defects (9.9.8.2, for test category II);
— Nondestructive testing of pipe ends to identify bundles (9.9.8.3);
— the test for resistance to intergranular corrosion (6.4);
— drawing of the bar code (10.1);
— application of a special protective coating (section 11).
4.3 Example of pipe designation in an order
An example of the designation of seamless pipes with dimensions corresponding to ISO 1127, an external diameter of 168.3 mm, a wall thickness of 4 mm, a measuring length of 6 m, of steel grade X 6 CrNiNb 18 11 and a HFS2 surface subjected to category I acceptance tests the attached document on acceptance inspection type 3.1.B according to ISO 10474:
Pipe ISO 1127 — 168.3x4 — 6 — GOST R ISO 9329−4 — X6 CrNiNb 18 11 — HFS2 — I — ISO 10474 3.1.B
5 Production technology
5.1 Method of steel smelting
Upon request, the customer should be provided with information on the method of steelmaking.
steel grade
Mass fraction of elements,%
FROM
Si, not more than
Mn, not more than
Р, not more than
S, not more than
Cr
Mo
Ni
Other
X 2 CrNi 18 10
Not more than 0,030
1.00
2.00
0.040
0.030
17.00−19.00
-
9.00−12.00
-
X 5 CrNi 18 9
Not more than 0,07
1.00
2.00
0.040
0.030
17.00−19.00
-
8.00−11.00
-
X 7 CrNi 18 9
0.04−0.10
1.00
2.00
0.040
0.030
17.00−19.00
-
8.00−11.00
-
X 6 CrNiNb 18 11
Not more than 0,08
1.00
2.00
0.040
0.030
