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GB/T 19285-2026Inspection of corrosion protection for buried steel pipelines (English PDF)

埋地钢质管道腐蚀防护工程检验

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

January 28, 2026

Implementation date

May 1, 2026

Scope

GB/T 19285-2026 is the English-translated version of 埋地钢质管道腐蚀防护工程检验.

GB/T 19285-2026 is the Chinese standard "Inspection of corrosion protection for buried steel pipelines". Its scope clause reads: This document specifies the basic requirements for the quality and corrosion protection effectiveness inspection of onshore buried steel pipeline external corrosion protection projects.

This document applies to the construction period inspection, operation inspection and periodic inspection of onshore buried steel pipeline external corrosion protection projects. Its clauses include terms, definitions and abbreviations.

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Document preview — GB/T 19285-2026

National Standard of the People's Republic of China

ICS: 23.040
Classification: J 15
Replacing: GB/T 19285-2014

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

Preface
1.Scope
2 Normative References
3.Terms, Definitions, and Abbreviations
4.Basic Regulations
5.Construction period inspection
6.Runtime Check
7.Periodic inspections
Appendix A (Normative) Methods for Testing Soil Corrosivity
Appendix B (Normative) Corrosion Rate Test Method
Appendix C (Normative) Stray Current Interference Test Method
Appendix D (Normative) Test Methods for Physical Properties of External Anti-corrosion Coatings
Appendix E (Normative) Method for non-excavation inspection of damage points in anti-corrosion coating
Appendix F (Normative) Inspection Method for Overall Condition of External Anti-corrosion Coating
Appendix G (Normative) Test Method for Insulation Performance of Insulating Flanges (Joints)
Appendix H (Normative) Grounding Resistance Test Method
Appendix I (Normative) Test Methods for Cathodic Protection Effectiveness
Appendix J (Normative) Sacrificial Anode Parameter Test Method
Appendix K (Normative) Evaluation Method for Quality Grade of Corrosion Protection System for Buried Steel Pipelines
Appendix L (Informative) Example 71.Quality Grade Evaluation of Corrosion Protection Systems for Buried Steel Pipelines

1 Scope

This document specifies the basic requirements for the quality and corrosion protection effectiveness inspection of onshore buried steel pipeline external corrosion protection projects.

This document applies to the construction period inspection, operation inspection and periodic inspection of onshore buried steel pipeline external corrosion protection projects.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 11032 AC gapless metal oxide surge arresters

GB/T 21447 Standard for External Corrosion Control of Steel Pipelines

GB/T 30582 Risk-based inspection and evaluation of external damage to buried steel pipelines

GB 50423 Code for Design of Oil and Gas Pipeline Crossing Projects

GB/T 50538 Technical Standard for Anti-corrosion and Thermal Insulation Layers of Buried Steel Pipelines

GB/T 51241 Technical Specification for External Corrosion Protection and Repair of Pipelines

SY/T 0029 Technical Specification for Application of Buried Steel Inspection Plates

3 Terms, Definitions and Abbreviations

3.1 Terms and Definitions

The following terms and definitions apply to this document.

3.1.1 Reference electrode

An electrode with a stable and reproducible potential in moist soil is used as a reference when testing the potential values of other electrodes.

3.1.2

Systems analysis and decision-making methods decompose complex problems into multiple levels and factors, determine the relative importance of each factor, and construct...

A hierarchical model is constructed to provide a scientific basis for decision-making, and it is applicable to complex decision-making problems with multiple objectives and multiple criteria.

3.1.3 Offpotential

To test the ground potential without an IR dropper, the potential of the pipeline to the electrolyte (soil) is measured instantaneously after a short delay following a interruption of the loop current.

3.1.4 Corrosion activity in the corrosion active region

Locations on pipelines where external corrosion is prone to occur, frequently occurs, and continues to happen.

3.1.5

The potential difference between the pipeline and its adjacent electrolyte (soil).

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

Referenced standards

Normative references

GB 50423

Cited by

Editions of GB/T 19285

Edition	Title	Revision	Status
GB/T 19285-2026	Inspection of corrosion protection for buried steel pipelines	current edition	Current
GB/T 19285-2014	Inspection of corrosion protection for buried steel pipelines	previous edition	Superseded

This page sells the current edition, GB/T 19285-2026. Earlier editions are listed for reference only.

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