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GB/T 39636-2020Specification of fusion-bonded epoxy external coatings for steel pipeline (English PDF)

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Issued by

State Administration for Market Regulation, China National Standardization Administration

Level / Type

National · Recommended

Issue date

December 14, 2020

Implementation date

July 1, 2021

Scope

GB/T 39636-2020 (Specification of fusion-bonded epoxy external coatings for steel pipeline) is available as an English-translated PDF.

GB/T 39636-2020 — This document specifies the technical requirements for fusion-bonded epoxy powder coatings for steel pipelines: This document is applicable to the design, production, construction and inspection of single-layer and double-layer structure fusion bonded epoxy powder outer coatings for steel pipelines, and is suitable for operation Fused epoxy powder outer coating for buried or underwater steel pipes with a temperature of -30 degrees C~80 degrees C:

Document preview — GB/T 39636-2020

National Standard of the People's Republic of China

ICS: 75.200
Classification: E 98

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

1 Scope1
2 Normative references1
3 Terms and definitions1
4 Fused epoxy powder outer coating structure2
5 Materials and inspection2
5:1 General requirements2
5:2 Performance of fusion bonded epoxy powder coating3
5:3 Performance of laboratory prepared coating3
5:4 Inspection of fusion bonded epoxy powder coating5
6 Coating construction and quality inspection5
6:1 Coating process specification5
6:2 Process qualification test6
6:3 Application7
6:4 Production quality inspection7
6:5 Sampling inspection of finished pipe8
7 Repair and recoat of coating9
7:1 Repair9
7:2 Recoating9
8 Marking, storage and shipment of finished pipes9
8:1 Sign9
8:2 Storage9
8:3 Shipment10
9 On-site repair and quality inspection10
9:1 General provisions10
9:2 Surface treatment10
9:3 Mending construction10
9:4 Quality inspection of repaired mouth10
10 Ditch backfilling of buried pipelines11
11 Delivery documents11
Appendix A (normative) Test method for curing time of epoxy powder12
Appendix B (Normative) Test method for thermal characteristics of epoxy powder and its coating14
Appendix C (Normative) Test method for moisture content of epoxy powder17
Appendix D (normative) Test method for gel time of epoxy powder19
Appendix E (Normative) Density test method of epoxy powder21
Appendix F (Normative) Coating Impact Test Method23
Appendix G (normative) Test method for porosity of coating25
Appendix H (Normative) Coating adhesion test method27
Appendix I (Normative) Test method for cathodic peel resistance of coating after bending29
Appendix J (Normative) Test method for contamination rate of interfacial impurities of coating31

Foreword

This document is in accordance with the provisions of GB/T 1:1-2020 Standardization Guidelines Part 1: Structure and Drafting Rules of Standardization Documents

Drafting:

This document uses the redrafting method to refer to ISO 21809-2:2014 ``Buried underground for pipeline transportation systems in the oil and gas industry

The outer covering layer of the pipeline or submerged under water: Part 2: Single-layer fusion epoxy coating: Compilation, consistent with ISO 21809-2:2014

The degree is not equivalent:

This document was proposed and managed by the National Petroleum and Natural Gas Standardization Technical Committee (SAC/TC355):

Drafting organizations of this document: China Petroleum Pipeline Science Research Institute Co:, Ltd:, China Petroleum Pipeline Bureau Engineering Co:, Ltd:, China

Petroleum and Natural Gas Co:, Ltd: Pipeline Branch, Sinopec Petroleum Machinery Co:, Ltd:, CNOOC Energy Development Co:, Ltd:

1 Scope

This document specifies the technical requirements for fusion-bonded epoxy powder coatings for steel pipelines:

This document is applicable to the design, production, construction and inspection of single-layer and double-layer structure fusion bonded epoxy powder outer coatings for steel pipelines, and is suitable for operation

Fused epoxy powder outer coating for buried or underwater steel pipes with a temperature of -30 degrees C~80 degrees C:

2 Normative references

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

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

This document:

GB/T 1408:1 Insulating material electric strength test method Part 1: Test under power frequency

GB/T 1768 Paints and varnishes-Determination of abrasion resistance-Rotating rubber grinding wheel 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 13288:5 Steel surface treatment before coating: Surface roughness characteristics of steel after blast cleaning: Part 5: Surface

Method for measuring roughness copy tape method

GB/T 18570:3 Evaluation test of surface cleanliness of steel surface treatment before coating: Part 3: Steel before coating

Surface dust evaluation (pressure sensitive adhesive tape method)

GB/T 18570:9 Evaluation test of surface cleanliness of steel surface treatment before coating: Part 9: Site of water-soluble salt

Conductivity measurement

GB/T 21782:1 Powder coatings Part 1: Determination of particle size distribution by sieving method

GB/T 31838:2 Dielectric and electrical characteristics of solid insulating materials Part 2: Resistance characteristics (DC method) Volume resistance and volume

Product resistivity

GB 50369 Code for construction and acceptance of long-distance oil and gas pipeline engineering

GB/T 51241 Technical Specification for Pipeline External Anticorrosion Patching

JB/T 6570 Ordinary abrasive magnetic content determination method

SY/T 0063 Leak detection test method for pipeline coating

SY/T 4113:1 Pipeline anti-corrosion coating performance test method Part 1: Scratch resistance test

SY/T 4113:3 Pipeline anticorrosive coating performance test method Part 3: Cathodic stripping test

SY/T 4113:5 Pipeline anticorrosive coating performance test method Part 5: Bend resistance test

SY/T 4113:7 Pipeline anticorrosive coating performance test method Part 7: Thickness test

SY/T 4113:9 Pipeline anticorrosion coating performance test method Part 9: Resistance to liquid medium immersion

3 Terms and definitions

The following terms and definitions apply to this document:

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

Referenced standards

Normative references

GB/T 1408 · GB/T 1768 · GB/T 8923 · GB/T 13288 · GB/T 18570 · GB/T 21782 · GB/T 31838 · GB 50369 · GB/T 51241 · JB/T 6570

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