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I. Regulations for piping layout diagrams – Unified regulations of Luoyang Institute (published on 2007-8-5: http://bbs.hcbbs.com/viewthread.php?tid=71001&highlight=%C5%E4%B9%DC%D6%C6%CD%BC) II. Regulations for piping layout diagrams (published on 2007-9-15: http://bbs.hcbbs.com/viewthread.php?tid=87554&highlight=%C5%E4%B9%DC%D6%C6%CD%BC) III. Regulations for piping layout diagrams (published on 2008-4-17: http://bbs.hcbbs.com/viewthread.php?tid=189702&highlight=%C5%E4%B9%DC%D6%C6%CD%BC) The content is as follows: Regulations for drawing pipeline plan views and detailed drawings of petrochemical plants (units) – Pipeline engineering field 1. Scope These regulations specify the methods for drawing plan views and detailed drawings of pipelines in petrochemical plants (units). These regulations apply to the piping design of pipelines within petrochemical plants (units); other piping designs may refer to them as a guide. 2 Relevant standards: “Management of Seals Used in Engineering Design Documents and Unified Format” 05AQ322-2002; “Design Symbols for Piping Systems in Petrochemical Enterprises” SH3052-93; “Technical Drawing – Sheet Size and Format” GB/T14689-93; “Technical Drawing – Fonts” GB/T14691-93. 3 General provisions. 4 Content and representation methods shown in the diagrams. 5 Indication of dimensions and elevations. 6 Division and layout of piping diagrams. Purpose of posting this post: I hope everyone will avoid downloading it repeatedly; it’s sufficient to download just one copy, thereby preventing waste of currency used for purchasing such materials – after all, it’s not easy to earn money! ! ! This post was last edited by SCLP2008 on 2009-3-30 11:39.]