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GB/T 27512-2025Risk assessment methods for buried pipelines (English PDF)

埋地管道风险评估方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

December 31, 2025

Implementation date

December 31, 2025

Scope

GB/T 27512-2025 is the English-translated version of 埋地管道风险评估方法.

GB/T 27512-2025 is the Chinese standard "Risk assessment methods for buried pipelines". Its scope clause reads: This document specifies the general principles, assessment process, data collection, pipeline segmentation, risk assessment, and risk mitigation for risk assessment of buried pipelines.

Recommendations on control measures, risk assessment reports, and risk reassessments. This document applies to the design review, completion acceptance, and in-service management of three types of pipelines. buried gathering and transmission pipelines, long-distance transmission pipelines, and public gas pipelines.

Risk assessment is conducted in three phases. Risk assessments for buried industrial pipelines and buried utility heating pipelines should follow the same guidelines.

This document does not apply to risk assessments of non-buried pipelines within stations and factory areas. Its clauses include terms and definitions.

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Document preview — GB/T 27512-2025

National Standard of the People's Republic of China

ICS: 23.040.01
Classification: J 74
Replacing: GB/T 27512-2011

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

Preface
Introduction
1.Scope
2 Normative References
3.Terms and Definitions
4 General Rules
5.Evaluation Process
6.Data Collection
7.Pipeline Section Division
8.Risk Assessment
9.Recommendations for Risk Mitigation and Control Measures
10 Risk Assessment Report
11 Risk Reassessment
Appendix A (Normative) Failure Probability Assessment of Buried Pipelines During Design Review Phase
Appendix C (Normative) Assessment of the Failure Probability of Buried Pipelines During Service
Appendix D (Normative) Assessment of Failure Consequences of Buried Pipelines

1 Scope

This document specifies the general principles, assessment process, data collection, pipeline segmentation, risk assessment, and risk mitigation for risk assessment of buried pipelines.

Recommendations on control measures, risk assessment reports, and risk reassessments.

This document applies to the design review, completion acceptance, and in-service management of three types of pipelines. buried gathering and transmission pipelines, long-distance transmission pipelines, and public gas pipelines.

Risk assessment is conducted in three phases. Risk assessments for buried industrial pipelines and buried utility heating pipelines should follow the same guidelines.

This document does not apply to risk assessments of non-buried pipelines within stations and factory areas.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are listed below.

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 19285 Inspection of Corrosion Protection Engineering for Buried Steel Pipelines

GB/T 21448 Technical Specification for Cathodic Protection of Buried Steel Pipelines

GB 32167 Integrity Management Standard for Oil and Gas Pipelines

GB/T 34275 Pressure Pipeline Specification for Long-Distance Pipelines

GB/T 34346 Risk-based guidelines for classifying safety hazards in oil and gas pipelines

GB/T 40702 Technical Specification for Geological Hazard Prevention of Oil and Gas Pipelines

GB 50028 Code for Design of Urban Gas Supply

GB 50183 Code for Fire Protection Design of Petroleum and Natural Gas Engineering

GB 50251 Code for Design of Gas Pipeline Engineering

GB 50253 Code for Design of Oil Pipeline Engineering

GB 50349 Gas Field Gathering and Transportation Design Code

GB 50350 Oilfield Oil and Gas Gathering and Transportation Design Code

GB 50369 Code for Construction and Acceptance of Long-Distance Oil and Gas Pipeline Projects

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

GB 50424 Construction Specification for Oil and Gas Pipeline Crossing Projects

GB 51142 Design Code for Liquefied Petroleum Gas Supply Engineering

GB/T 51455 Standard for Construction and Acceptance of Urban Gas Transmission and Distribution Engineering

GB 55009 Specification for Gas Engineering Projects

SY/T 4204 Standard for Acceptance of Construction Quality of Oil and Gas Construction Projects - Oil and Gas Field Gathering and Transmission Pipeline Engineering

3 Terms and Definitions

The following terms and definitions apply to this document.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 54 pages — is available in the English PDF.

Referenced standards

Normative references

GB 50423

Cited by

GB 32167-2015Oil and gas pipeline integrity management specification

Editions of GB/T 27512

Edition	Title	Revision	Status
GB/T 27512-2025	Risk assessment methods for buried pipelines	current edition	Current
GB/T 27512-2011	Risk assessment methods for buried pipelines	previous edition	Superseded

This page sells the current edition, GB/T 27512-2025. Earlier editions are listed for reference only.

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