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GB/T 34349-2017 English PDF

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GB/T 34349-2017: External inspection methodology for internal corrosion of natural gas pipelines
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PDF similar to GB/T 34349-2017


Standard similar to GB/T 34349-2017

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Basic data

Standard ID GB/T 34349-2017 (GB/T34349-2017)
Description (Translated English) External inspection methodology for internal corrosion of natural gas pipelines
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard E29
Classification of International Standard 23.040.01
Word Count Estimation 18,132
Date of Issue 2017-10-14
Date of Implementation 2018-05-01
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 34349-2017: External inspection methodology for internal corrosion of natural gas pipelines

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External inspection methodology for internal corrosion of natural gas pipelines ICS 23.040.01 E29 National Standards of People's Republic of China Gas pipeline corrosion testing methods 2017-10-14 Published 2018-05-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released Directory Preface Ⅰ 1 Scope 1 2 Normative references 1 3 Terms, definitions and symbols 1 4 General 2 5 Data Collection 3 6 Corrosion location prediction 4 7 excavation test 6 8 detection cycle to determine 8 Record and report 8 Appendix A (Informative) Dry gas pipeline corrosion testing applications 10 Appendix B (informative) detection section definition example 14 References 15

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is proposed and managed by the National Boiler and Pressure Vessel Standardization Technical Committee (SAC/TC262). This standard drafting unit. China Special Equipment Inspection and Research Institute, Beijing Jiaotong University, Beijing University of Science and Technology, Daqing Oilfield special equipment inspection Center, Guangdong Dapeng LNG Co., Ltd., Shenzhen Gas Group Co., Ltd., China National Petroleum Corporation Tower Li Mu Oilfield Branch, PetroChina Changqing Oilfield Branch of the first gas plant, Daqing Oilfield Co., Ltd. days Gas Branch, China Petroleum & Chemical Corporation Zhongyuan Oilfield Puguang Branch, China Petroleum Pipeline Institute of Science and Technology, Chongqing City Special Equipment Testing Institute, Shanghai Quality and Technical Supervision. The main drafters of this standard. Yang Yong, He Yan Yang, Ma Honglian, Lan Huiqing, Li Xiaogang, Wu Yabin, single Hongxiang, Wang Liangjun, Chen autumn Xiong, Wang Xiaomei, Zhou Weijun, Dang Xiaofeng, Tian Yihua, Guo Qiang, Xu Changxue, Wang Li, Wang Shan. Gas pipeline corrosion testing methods

1 Scope

This standard specifies the contents, methods and procedures for testing corrosion outside the buried steel gas pipeline, including general principles, data collection, corrosion location Forecasting, excavation testing, testing cycle determination, recording and reporting, and appendices. This standard applies to short-term anomalies exist in a small amount of liquid water (or other electrolytes) dry gas pipeline. Ground laying gas steel Pipeline corrosion testing may refer to the implementation of this standard.

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 17747 (all parts) calculation of natural gas compression factor 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, definitions and symbols 3.1 Terms and definitions The following terms and definitions apply to this document. 3.1.1 Dry gas Gas above dew point temperature and free of condensate. 3.1.2 Pipeline corrosion testing internalcorrosionexternalinspectionforpipeline Methods of detecting corrosion of pipe lining from outside the pipe, including data collection, prediction of corrosion location, excavation inspection and inspection Cycle to determine other steps. 3.1.3 Critical inclination angle criticalinclinationangle Flow model calculated under the condition of laminar flow gas does not occur carrying the minimum dip angle. 3.1.4 Actual inclination inclinationangle Pipeline elevation between the two points of change. 3.1.5 Inspection section inspectionregion Pipelines carrying out internal corrosion testing have similar physical characteristics and operating parameters, a continuous tube with no significant changes in fluid properties Road (including the weld).

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