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GB/T 35067-2018Corrosion resistant alloy bimetal bends for petroleum and natural gas industries (English PDF)

石油天然气工业用耐腐蚀合金复合弯管

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

May 14, 2018

Implementation date

December 1, 2018

Scope

GB/T 35067-2018 is the English-translated version of 石油天然气工业用耐腐蚀合金复合弯管.

GB/T 35067-2018 sets the requirements for corrosion-resistant alloy bimetal bends used in oil and gas pipeline transportation systems, in nominal diameters from DN150 to DN800 and with a bending radius of at least 5D.

It covers design, dimensions and tolerances such as wall thickness, inner diameter, wall thinning, ovality, bend angle and end-face squareness, the base material, inner cladding and mother pipe, and manufacturing by welding, heat treatment and cold sizing, with a manufacturing procedure qualification in Annex A. Technical requirements and tests include chemical composition, tensile properties, Charpy impact toughness, guided bend, Vickers hardness, cladding shear bond strength, intergranular and base-metal corrosion, and hydrostatic testing, followed by non-destructive testing, surface defects, marking, transport and documentation. It was issued on 14 May 2018 and has applied since 1 December 2018.

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Document preview — GB/T 35067-2018

National Standard of the People's Republic of China

ICS: 75.200; 23.040.01
Classification: E 16;J15

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Terms and definitions, symbols, codes and abbreviations
3.1 Terms and Definitions
3.2 Symbols and Codes
3.3 Abbreviations
4 Information provided by the purchaser
4.1 Basic Information
4.2 Supplementary information
4.3 Mother tube information
5 Design
6 Dimensions & Tolerances
6.1 Wall thickness
6.2 Inner diameter
6.3 Wall thickness reduction rate
6.4 Ellipticity
6.5 Bending angle and bending radius
6.6 Bend flatness
6.7 End face verticality
6.8 End face flatness
6.9 Straight pipe length
7 Material
7.1 Grassroots
7.2 Inner coating
7.3 Composite board
7.4 Mother tube
8 Manufacturing
8.1 General provisions
8.2 Welding
8.3 Heat treatment
8.4 Cold calibration circle after bending
8.5 Pipe end
8.6 Surface treatment
8.7 Process Evaluation
9 Technical requirements and test methods
9.1 General provisions
9.2 Geometry
9.3 Chemical composition
9.4 Tensile properties
9.5 CVN impact toughness
9.6 Weld Guide Bending
9.7 Full-section Vickers hardness
9.8 Surface hardness
9.9 Macroscopic inspection of welds and metallographic examination
9.10 Inner coating shear bond strength
9.11 Intergranular corrosion test
9.12 Corrosion test of base material
9.13 Inner cladding material corrosion test
9.14 Hydrostatic test and design verification test
10 Nondestructive testing
11 Surface quality, defects and defects handling
11.1 Surface quality
11.2 Defects and Defects Processing
12 Signs
12.1 Sign method
12.2 Marking position
12.3 Mark content
13 Transportation and protection
14 File
Appendix A (Normative) Manufacturing Process Assessment
Appendix B (informative) Composite bend test and test sample sampling position
Reference

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This standard stipulates that the oil and gas industry pipeline transportation system uses the nominal diameter DN150~DN800 and the bending radius R>=5D to resist corrosion. Design, geometry, materials, manufacturing processes, technical requirements and inspection methods, NDT, surface quality and defect repair of etched alloy composite elbows, Basic requirements for signs, transportation and protection.

This standard applies to the transportation pipelines in the oil and gas industry and the process pipelines to transport oil and natural gas containing corrosive media. Corrosion-resistant alloy composite elbows for single-phase or multi-phase fluids such as water, and other fields can also be used.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 228.1 tensile testing of metallic materials - Part 1

GB/T 228.2 tensile testing of metallic materials - Part 2.

GB/T 229 metal material Charpy pendulum impact test method

GB/T 232 metal material bending test method

GB/T 4340.1 Vickers hardness test for metallic materials - Part 1. Test methods

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

GB/T 6396 composite steel plate mechanical and process performance test method

GB/T 8923.1-2011 Determination of surface cleanliness of steels before coatings -- Part 1: uncoated Corrosion grade and treatment grade of the steel surface and the surface of the steel after the original coating is completely removed

GB/T 10561 steel - Determination of non-metallic inclusions - Standards

GB/T 17394.1 Test methods for hardness of metallic materials - Part 1. Test methods

GB/T 17600.1 Elongation of steel - Part 1. Carbon steel and low alloy steel

GB/T 29168.1 Induction heating bends, fittings and flanges for pipelines in the oil and gas industry - Part 1 Heating elbow

GB 50251 gas pipeline engineering design specification

GB 50253 Oil Pipeline Engineering Design Specification

GB/T 35072-2018 Corrosion-resistant alloy composite pipe fittings for oil and gas industry

NB/T 47013.7 Non-destructive testing of pressure equipment - Part 7. Visual inspection

NB/T 47014 Pressure welding equipment welding process evaluation

NB/T 47015 Pressure Vessel Welding Procedure

SY/T 5257 steel induction heating elbow for oil and gas transmission

TSG Z6002 special equipment welding operator assessment rules

ISO 15156-1 - Petroleum and natural gas industries - Materials for use in H2S - Part 1 General principles of choice (Petroleum and naturalgasindustries-Materialsforusein H2S-containing environmentsinoilandgasproduction-Part 1: Generalprinciplesforselectionofcracking-resistant Materials)

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 25 pages — is available in the English PDF.

Referenced standards

Normative references

SY/T 5257 · TSG Z6002 · ISO 15156-1

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