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GB/T 29168.1-2021Petroleum and natural gas industries - Induction bends, fittings and flanges for pipeline transportation systems - Part 1: Induction bends (English PDF)

石油天然气工业管道输送系统用感应加热弯管、管件和法兰第1部分：感应加热弯管

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

August 20, 2021

Implementation date

March 1, 2022

Scope

GB/T 29168.1-2021 is the English-translated version of 石油天然气工业管道输送系统用感应加热弯管、管件和法兰第1部分：感应加热弯管.

GB/T 29168.1-2021 is the Chinese standard "Petroleum and natural gas industries - Induction bends, fittings and flanges for pipeline transportation systems - Part 1: Induction bends".

Its scope clause reads: This document specifies the design, materials, manufacturing process, mechanical properties, testing and Inspection, marking, transportation, storage and protection requirements.

The elbow made in accordance with the provisions of this document is suitable for natural gas, crude oil and Refined oil pipelines required by product standards.

This document is applicable to induction heating with carbon steel or low-alloy steel seamless steel pipes, high-frequency welded pipes and longitudinal submerged arc welded steel pipes as the parent pipe.

Hot elbow. Note. These materials are typical C-Mn steel or low-alloy steel, consistent with the strength level of GB/T 9711-2017 and ISO 3183.2019 line pipe. The two product specification levels (PSL) of induction heating bends specified in this document are consistent with GB/T 9711-2017 and ISO 3183.2019. correspond.

This document does not apply to elbows for pipelines produced by other processes.

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Document preview — GB/T 29168.1-2021

National Standard of the People's Republic of China

Classification: E 16

Issued by: State Administration for Market Regulation, China National Standardization Administration

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
4.1 Symbol
4.2 Abbreviations
5 Logo
6 Design
6.1 Load
6.2 Criteria
6.3 Wall thickness of elbow
6.4 Unequal strength connection design
7 Information provided by the purchaser
7.1 General information
7.2 Additional information
7.3 Mother tube information
8 Materials
9 Manufacturing
9.1 General
9.2 Manufacturing process confirmation
9.3 Elbow pipe for evaluation test
9.4 Heat treatment after bending
9.5 Forming and sizing after bending
9.6 Pipe end
10 Performance requirements for elbows
10.1 Tensile properties
10.2 Charpy impact toughness
10.3 Hardness
10.4 Guided bending performance of submerged arc welding elbow pipe
10.5 Flattening test
10.6 Metallographic structure and grain size inspection
10.7 HIC test
10.8 SSC test
10.9 Dimensions, geometry and allowable deviations
11 Test and inspection
11.1 General
11.2 Test and inspection scope
11.3 Chemical composition
11.4 Mechanical performance inspection
11.5 Non-destructive testing
11.6 Size
11.7 Measurement
11.8 Hydrostatic pressure test
12 Check the file
13 Sign
14 Packaging and transportation
Appendix A (informative) Structural changes of this document compared with ISO 15590-1.2018
Appendix B (informative) Technical differences between this document and ISO 15590-1.2018 and their reasons
Appendix C (normative) Non-acid elbow pipe material
Appendix D (Normative) Manufacturing Process Specification
Appendix E (normative) PSL2S elbow under acidic medium

1 Scope

This document specifies the design, materials, manufacturing process, mechanical properties, testing and

Inspection, marking, transportation, storage and protection requirements.

The elbow made in accordance with the provisions of this document is suitable for natural gas, crude oil and

Refined oil pipelines required by product standards.

Hot elbow.

Note. These materials are typical C-Mn steel or low-alloy steel, consistent with the strength level of GB/T 9711-2017 and ISO 3183.2019 line pipe.

The two product specification levels (PSL) of induction heating bends specified in this document are consistent with GB/T 9711-2017 and ISO 3183.2019.

correspond.

This document does not apply to elbows for pipelines produced by other processes.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations

Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to

This document.

GB/T 228.1 Tensile test of metallic materials Part 1.Room temperature test method (GB/T 228.1-2010, ISO 6892-1.

2009, MOD)

GB/T 228.2 Tensile test of metallic materials Part 2.High temperature test method (GB/T 228.2-2015, ISO 6892-2.

2011, MOD)

GB/T 229 Charpy Pendulum Impact Test Method for Metallic Materials (GB/T 229-2020, ISO 148-1.2016, MOD)

GB/T 230.1 Rockwell hardness test of metallic materials Part 1.Test method (GB/T 230.1-2018, ISO 6508-1.

2016, MOD)

GB/T 232 Bend test method for metallic materials (GB/T 232-2010, ISO 7438.2005, MOD)

GB/T 4157-2017 Laboratory test method for resistance to sulfide stress cracking and stress corrosion cracking of metals in hydrogen sulfide environment

GB/T 4335 Low-carbon steel cold-rolled sheet ferrite grain size determination method

GB/T 4340.1 Vickers hardness test of metallic materials Part 1.Test method (GB/T 4340.1-2009, ISO 6507-

1.2005, MOD)

GB/T 6394 Method for determination of average grain size of metals

GB/T 8650-2015 Pipeline steel and pressure vessel steel resistance to hydrogen-induced cracking assessment method

GB/T 8923.1 Visual assessment of surface cleanliness of steel surface treatment before coating-Part 1.Uncoated steel

The corrosion grade and treatment grade of the surface and the steel surface after the original coating has been completely removed (GB/T 8923.1-2011, ISO 8501-1.

2007, IDT)

SY/T 7774 | GB/T 9711 | SY/T 10025 | GB/T 29168.4 | GB/T 29168.2 | GB/T 29165.3 | […]

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 84 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 6892 · ISO 148 · ISO 6508 · ISO 7438.2005 · ISO 6507 · ISO 8501

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