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Foreword

According to the requirements specified in the Plan for Developing Professional Standards in 2004(Document Number:〔2004〕No.872)issued by the General Administration Office of National Development and Reform Commission,this specification is revised by its development team based on wide and intensive investigations and studies made,practices summarized,comments requested as well as references to international codes and advanced foreign standards.

This specification comprises 4 chapters.

The main technical contents of this Specification include series of seamless and welded carbon steel and alloy steel pipe size.

This specification is revised on a basis of Series of Steel Pipe Size in Petrochemical Industry(SH 3405-1996),and main revisions include:

—Enlarge the range of nominal diameters from DN 15-DN 2000 to DN 6-DN 3400;

—Add series DN 6,DN 8,DN 90,DN 1050,DN 1150;

—Outside diameters of steel pipes are consistent with ASME B36.10M and ASME B36.19M without rounding;

—Update the normative references,and cancel two reference standards:GB 5681 and SY/T 5297;

China Petrochemical Corporation(Sinopec Group)is in charge of the administration of this specification,Sinopec Technical Center for Piping Design and Engineering is responsible for its routine management,and Sinopec Luoyang Petrochemical Engineering Corporation is tasked for explanation of specific technical contents.If any comments and recommendations are proposed in implementation of this specification,please send your comments/recommendations to the routine maintenance organization and chief development organization.

Routine management organization:

       Sinopec Technical Center for Piping Design and Engineering

       Address:Bldg.21 Anyuan,Anhui Bei Li,Chaoyang District,Beijing

       Postcode:100101

       Tel:010-84877282

       Fax:010-64949514

Chief development organization:

       Sinopec Luoyang Petrochemical Engineering Corporation

       Address:No.27,West Zhongzhou Rd.,Luoyang,Henan Province

       Postcode:471003

Chief drafting staff:

       Wang Jinfu Yang Ruiping

Chief reviewing staff:

       Wang Jianyu Ge Chunyu Zhang Dejiang Zhang Fayou Li Yonghong

       Lei Yunzhou Yang Pinghui Yuan Can Li Xiuming Zhang Baojiang

       Chen Yongliang Xu Dan Jiang Guoxian Xu Mingcai

       Wang Changsheng Dong Xiufeng

This specification was initially issued in 1989,and first revised in 1996.This edition is the 2nd revision.

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