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SY/T 6151-2022 English PDF (SYT6151-2009, SYT6151-1995)

SY/T 6151-2022_English: PDF (SY/T6151-2022)
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
SY/T 6151-2022English329 Add to Cart 3 days [Need to translate] (Evaluation method of metal loss defects in steel pipelines) Valid SY/T 6151-2022
SY/T 6151-2009English135 Add to Cart 0--9 seconds. Auto-delivery Assessment of corroded steel pipelines Obsolete SY/T 6151-2009
SY/T 6151-1995English399 Add to Cart 3 days [Need to translate] (Steel Pipe body corrosion damage assessment method) Obsolete SY/T 6151-1995


BASIC DATA
Standard ID SY/T 6151-2022 (SY/T6151-2022)
Description (Translated English) (Evaluation method of metal loss defects in steel pipelines)
Sector / Industry Oil & Gas Industry Standard (Recommended)
Word Count Estimation 14,132
Date of Issue 2022-11-04
Date of Implementation 2023-05-04

BASIC DATA
Standard ID SY/T 6151-2009 (SY/T6151-2009)
Description (Translated English) Assessment of corroded steel pipelines
Sector / Industry Oil & Gas Industry Standard (Recommended)
Classification of Chinese Standard E10
Classification of International Standard 75.010
Word Count Estimation 11,154
Date of Issue 2009-12-01
Date of Implementation 2010-05-01
Older Standard (superseded by this standard) SY/T 6151-1995
Quoted Standard GB/T 228; GB/T 21143; SY/T 6597
Drafting Organization China National Petroleum Corporation Pipeline Company (including the original Northeast oil Authority)
Administrative Organization Oil and Gas Storage and Transportation Standardization Technical Committee
Regulation (derived from) National Energy Board Notice 2009 No. 2; industry standard filing Notice 2010 No. 2 (No. 122 overall)
Summary This standard specifies the in-service pipelines containing corrosion damage evaluation method. This standard applies to blunt, low stress concentration corrosion damage of carbon and low alloy steel pipes evaluation. Blunt pipeline mechanical damage assessment could refer to this standard.

BASIC DATA
Standard ID SY/T 6151-1995 (SY/T6151-1995)
Description (Translated English) (Steel Pipe body corrosion damage assessment method)
Sector / Industry Oil & Gas Industry Standard (Recommended)
Classification of Chinese Standard E16
Classification of International Standard 75.010; 75.200
Word Count Estimation 10,195
Date of Issue 1995/12/25
Date of Implementation 1996/6/30
Regulation (derived from) State Energy Bureau Notice 2009 No. 2; Industry Standard Filing Notice 2010 No. 2 (Overall No. 122)


SY/T 6151-2009     Page 1 of 14 SY PETROLEUM AND NATURAL GAS INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 75-010 E 10 Registration number. 27482-2010 Replacing SY/T 6151-1995 Assessment of corroded steel pipelines ISSUED ON. DECEMBER 01, 2009 IMPLEMENTED ON. MAY 01, 2010 Issued by. National Energy Administration     Page 2 of 14 Table of contents Foreword ... 3  1 Scope ... 4  2 Normative references ... 4  3 Requirements for assessment personnel ... 4  4 Raw data preparation before assessment ... 5  5 Corrosion area measurement ... 5  5.1 Measurement method ... 5  5.2 Corrosion-pit depth measurement ... 5  5.3 Longitudinal length measurement ... 5  5.4 Circumferential length measurement ... 5  6 Pipe corrosion damage assessment category-classification ... 6  7 Pipe corrosion damage size assessment method ... 6  7.1 Assessment based on corrosion-pit’s relative depth ... 6  7.2 Assessment based on corrosion-pit’s longitudinal length ... 7  7.3 Effect of circumferential corrosion scale ... 7  8 Maximum safe operating pressure assessment method ... 8  8.1 Maximum safe operating pressure calculation ... 9  8.2 Assessment of corrosion damage category ... 9  8.3 Overall assessment process ... 10  Appendix A ... 11  Appendix B ... 14      Page 3 of 14 Foreword Pipeline corrosion damage causes the pipe body to form various shape and size defects. Serious defects can lead to pressure pipeline leak or rupture accident, which impacts the safe and smooth operation of pipeline. Therefore, as for the damaged pipeline, proposing a scientific assessment method has become a pressing need for the pipeline industry. This Standard replaces SY/T 6151-1995 “Assessment of corroded steel pipelines”. Compared with SY/T 6151-1995, the main changes are as follows. - MODIFY the corrosion damage assessment category content (Chapter 6 of this edition); - USE Rstreng’s yield strength calculation equation to replace the yield strength calculation equation under ASME B31G-1991 which is referenced in SY/T 6151-1995 (Clause 8.1 of this edition); - MODIFY the assessment threshold of corrosion damage category (Clause 8.2 of this edition). The Appendix A and B of this Standard are normative. This Standard was proposed by and shall be under the jurisdiction of Gas Storage and Transportation Standardization Technical Committee. The drafting organizations of this Standard. China National Petroleum Pipeline Company Limited (including the original Northeast Oil Transportation Authority), Chinese Academy of Sciences Institute of Metal Research. Main drafters of this Standard. Chen Jianfeng, Han Enhou, Zhang Huabing, Feng Qingshan, Yu Jingchun, Li Shaozhong, Zhang Bo, Ke Wei, Wang Xueli, Song Hancheng, Wang Fuxiang. This Standard replaces the previous standard as follows. - SY/T 6151-1995.     Page 4 of 14 Assessment of corroded steel pipelines 1 Scope This Standard specifies the method for assessment of corrosion damage of in service pipeline. This Standard applies to the assessment of blunt, low stress concentration corrosion damage carbon steel and low alloy steel pipeline. The assessment of pipeline’s blunt mechanical damage can be conducted in accordance with this Standard. This Standard does not apply to the assessment of the steel pipeline which is before installation or in installation process, or the assessment of the steel pipelines which have serious defects in weld and heat affected zone. This Standard applies only to the internal pressure bearing pipeline; when the pipeline is withstanding a big additional stress, it shall be considered separately. 2 Normative references The provisions in following documents become the provisions of this Standard through reference in this Standard. For dated references, the subsequent amendments (excluding corrigendum) or revisions do not apply to this Standard, however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies. GB/T 228 Metallic materials - Tensile testing at ambient temperature GB/T 21143 Metallic materials - Unified method of test for determination of quasi-static fracture toughness SY/T 6597 Technical standard of intelligent pigging on steel pipeline 3 Requirements for assessment personnel Assessment personnel shall have the following basic knowledge and abilities. a) Pipeline work principles and safe operation precautions.     Page 5 of 14 b) Basic knowledge on material corrosion and mechanical properties. c) Identification and measurement of field corrosion state. 4 Raw data preparation before assessment Raw data shall include the following. a) Pipeline diameter, wall thickness, material, mechanical properties AND manufacturers. b) Transmission medium, working pressure, temperature, AND the latest pressure test conditions. c) Corrosion environment and corrosion protection conditions. d) Pipeline operating history, such as pipe age, leak history, AND larger maintenance and repair works, etc. 5 Corrosion area measurement 5.1 Measurement method 5.1.1 As for corrosion defects, the intelligent internal detection can be used, which is detailed in SY/T 6597. 5.1.2 As for corrosion defects, it is also allowed to use the external detection method such as calipers, straight ruler, tape measure, ultrasonic thickness gauge AND other measuring instruments (such as pitting measuring gauge). 5.2 Corrosion-pit depth measurement Accurately MEASURE corrosion-pit depth; as for the corrosion-pits which are connected into a piece, MEASURE the depth of the deepest part. 5.3 Longitudinal length measurement 5.3.1 MEASURE each corrosion-pit’s longitudinal (in the direction of the pipe axis) maximum projected length. 5.3.2 MEASURE the total length of the same corrosion-pit which is determined in accordance with the detailed rules of Clause 7.2.3. 5.4 Circumferential length measurement 5.4.1 MEASURE each corrosion-pit’s maximum projected length along the ......

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