GB/T 9711-2011 in English

《GB/T 9711-2011石油天然气工业 管线输送系统用钢管》由TC355（全国石油天然气标准化技术委员会）归口，TC355SC9（全国石油天然气标准化技术委员会石油专用管材分会）执行，主管部门为国家标准化管理委员会。

1 Scope
This standard specifies requirements for the manufacture of two product specification levels (PSL 1 and PSL 2) of seamless and welded steel pipes for use in pipeline transportation systems in the petroleum and natural gas industries.
This standard is applicable to seamless and welded steel pipes for use in petroleum and natural gas transportation.
This standard is not applicable to cast pipe.

2 Conformity
2.1 Units of measurement
In this standard, data are expressed in both SI units and USC units. For a specific order item, unless otherwise stated, only one system of units shall be used, without combining data expressed in the other system.
2.2 Rounding
Unless otherwise stated in this standard, to determine conformance with the specified requirements, observed or calculated values shall be rounded to the nearest unit in the last right-hand place of figures used in expressing the limiting value, in accordance with ISO 31-0:1992, Annex B, Rule A.
NOTE For the purposes of this provision, the rounding method of ASTM E 29-04[1] is equivalent to ISO 31-0:1992, Annex B, Rule A.
2.3 Compliance to this standard
A quality system should be applied to assist compliance with the requirements of this standard.
NOTE ISO/TS 29001[2] gives sector-specific guidance on quality management systems.
A contract can specify that the manufacturer shall be responsible for complying with all of the applicable requirements of this International Standard. It shall be permissible for the purchaser to make any investigation necessary in order to be assured of compliance by the manufacturer and to reject any material that does not comply.

3 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 228 Metallic Materials – Tensile Testing at Ambient Temperature (GB/T 228-2002, eqv ISO 6892:1998)
GB/T 232 Metallic materials - Bend test (GB/T 232-1999, eqv ISO 7438:1985)
GB/T 244 Metallic materials - Tube (in full section) - Bend test(GB/T 244-2008, ISO 8491: 1998, IDT)
GB/T 246 Metallic materials - Tube - Flattening test(GB/T-2007, ISO 8492: 1998, IDT)
GB/T 2975 Steel and steel products - Location and preparation of samples and test pieces for mechanical testing (GB/T 2975-1998, eqv ISO 377:1997)
GB/T 4336 Standard test method for spark discharge atomic emission spectrometric analysis of carbon and low-Alloy steel (routine method)
GB/T 4340.1 Metallic materials-Vickers hardness test - Part 1:Test method (GB/T 4340.1-2009, ISO 6507-1:2005, MOD)
GB/T 4340.2 Metallic Vickers hardness test-Part 2:Verification of hardness testers (GB/T 4340.2-1999,idt ISO 6507-2:1997)
GB/T 4340.3 Metallic Vickers hardness test-Part 3:Calibration of hardness reference blocks (GB/T 4340.3-1999, idt ISO 6507-3:1997)
GB/T 8923-1988 Rust grades and preparation grades of steel surfaces before application of paints and related products ( eqv ISO 8501-1:1988)
GB/T 9253.2 Petroleum and natural gas industries-Threading，gauging，and thread inspection of casing，tubing and line pipe threads (GB/T 9253.2-1999, idt API Spec 5B: 19961))
GB/T 15574 Steel products - Definitions and classification (GB/T 15574-1995, eqv ISO 6929: 1987)
GB/T 15970.2 Corrosion of metals and alloys - Stress corrosion testing - Part 2: Preparation and use of bent- beam specimens (GB/T 15970.2-2000, ISO 7539.2: 1989, IDT)
GB/T 17505 Steel and steel products - General technical delivery requirements (GB/T 17505-1998, eqv ISO 404:1992)
GB/T 17600.1 Steel - Conversion of elongation values - Part 1: Carbon and low alloy steels (GB/T 17600.1-1998, ISO 2566-1:1984, EQV)
GB/T 18253-2000 Steel and steel products - Inspection documents (ISO 10474: 1991, EQV)
GB/T 19348.1-2003 Non-destructive testing - Industrial radiographic films - Part 1: Classification of film systems for industrial radiography (ISO 11699-1:1998, IDT)
GB/T 20066 Steel and iron - Sampling and preparation of samples for the determination of chemical composition (GB/T 20066-2006, ISO 14284: 1996, IDT)
GB/T 23901.1-2009 Non-destructive testing-Image quality of radiographs-Part 1:Image quality indicators (wire type)-Determination of image quality value (ISO 19232.1:2004, IDT)
SY/T 6423.1-1999 Submerged arc-welded steel tubes for pressure purposes - Radiographic testing of the weld seam for the detection of imperfections (ISO 12096:1996, EQV)
SY/T 6423.2-1999 Electric resistance and induction welded steel tubes for pressure purposes - Ultrasonic testing of the weld seam for the detection of longitudinal imperfections (ISO 9764:1989, EQV)
SY/T 6423.3-1999 Submerged arc-welded steel tubes for pressure purposes - Ultrasonic testing of the weld seam for the detection of longitudinal and/or transverse imperfections (ISO 9765:1990, EQV)
SY/T 6423.4-1999 Welded steel tubes for pressure purposes - Ultrasonic testing of the area adjacent to the weld seam for the detection of laminar imperfections (ISO 13663:1995, EQV)

1 Scope
2 Conformity
3 Normative References
4 Terms and Definitions
5 Symbols and Abbreviated Terms
6 Pipe grade, Steel Grade and Delivery Condition
7 Information to Be Supplied by the Purchaser
8 Manufacturing
9 Acceptance Criteria
10 Inspection
11 Marking
12 Coatings and Thread Protectors
13 Retention of Records
14 Pipe Loading
Annex A (Normative) Specification for Welded Jointers
Annex B (Normative) Manufacturing Procedure Qualification for PSL 2 Pipe
Annex C (Normative) Treatment of Surface Imperfections and Defects
Annex D (Normative) Repair Welding Procedure
Annex E (Normative) On-destructive Inspection for Other Than Sour Service or Offshore Service
Annex F (Normative) Equirements for Couplings (PSL 1 Only)
Annex G (Normative) SL 2 Pipe With Resistance to Ductile Fracture Propagation
Annex H (Normative) SL 2 Pipe Ordered for Sour Service
Annex I (Normative) Pipe Ordered As “Through the Flowline” (TFL) Pipe
Annex J (Normative) SL 2 Pipe Ordered for Offshore Service
Annex K (Normative) On-destructive Inspection for Pipe Ordered for Sour Service and/or Offshore Service
Annex L (Informative) Teel Designations
Annex M (Informative) Orrespondence of Terminology Between GB/T 9711(ISO 3183) and Its Source Documents