GB/T 34350-2017External inspection methodology for internal corrosion of liquid petroleum pipelines (English PDF)
输油管道内腐蚀外检测方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
October 14, 2017
Implementation date
May 1, 2018
Scope
GB/T 34350-2017 is the English-translated version of 输油管道内腐蚀外检测方法.
GB/T 34350-2017 is the Chinese standard "External inspection methodology for internal corrosion of liquid petroleum pipelines".
Its scope clause reads: This standard specifies the contents, methods and procedures for testing corrosion outside the buried steel pipelines, including general principles, data collection, corrosion location Forecasting, excavation testing, testing cycle determination, recording and reporting, and appendices.
This standard applies to the full flow of liquid petroleum pipe. Ground laying oil pipeline corrosion testing can refer to this standard carried out. Its clauses include terms and definitions.
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Document preview — GB/T 34350-2017
National Standard of the People's Republic of China
- ICS
- 23.040.01
- Classification
- E 29
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Preface
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 General
- 5 Data Collection
- 6 Corrosion location prediction
- 7 excavation test
- 8 detection cycle to determine
- 9 Record and report
- Appendix A (Informative) Pipeline Prediction
- Appendix B (Informative) Determination of wettability
- Appendix C (Informative) Solid impurities accumulation prediction
- Appendix D (Informative) Pipeline corrosion testing corrosion location prediction application example
- References
1 Scope
This standard specifies the contents, methods and procedures for testing corrosion outside the buried steel pipelines, including general principles, data collection, corrosion location
Forecasting, excavation testing, testing cycle determination, recording and reporting, and appendices.
This standard applies to the full flow of liquid petroleum pipe. Ground laying oil pipeline corrosion testing can refer to this standard carried out.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all revisions) applies to this document.
GB/T 19285 buried steel pipeline corrosion protection engineering inspection
GB/T 19624 Safety assessment of pressure vessels with defects
Risk - based inspection and evaluation of the damage of buried steel pipelines
TSGD7003 pressure pipe regular inspection rules --- long-distance (oil and gas) pipe
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Pipeline corrosion testing
Methods of detecting corrosion on the inner wall of pipeline from the outside of the pipeline include data collection, prediction of corrosion location, excavation inspection and
Detection cycle to determine such steps.
3.2 Inspection section
Carrying out the detection of oil pipelines with internal corrosion, the fluid characteristics, corrosion inhibitor measures and other chemical treatment did not change significantly
Continued pipeline (including weld), the same section has similar physical characteristics and operating parameters.
3.3 Oil-water dispersed flow
A flow pattern of oil-water multi-phase flow, that is, the oil and water phases flow in a uniformly stable oil-water emulsion.
3.4 Oil-water stratified flow
A fluid state of multiphase flow of oil and gas, that is, a fluid that can be divided into layers by the flow of a light fluid (oil phase) floating on a heavier fluid (water phase).
3.5 True water speed
Vwi
Average velocity of bottom water in stratified flow of oil and water.
......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.
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