1、PFI Standard ES-44 |Denotes Revision (Revised December 2013) DRAFTING PRACTICES STANDARD Prepared by Pipe Fabrication Institute Engineering Committee All PFI Standards are advisory only. There is no agreement to adhere to any PFI Standard and their use by anyone is entirely voluntary. Copyright by P
2、IPE FABRICATION INSTITUTE Dedicated to Technical Advancements and Standardization in the Pipe Fabrication Industry Since 1913 USA 511 Avenue of Americas, # 601 New York, NY 10011 CANADA 655, 32ndAvenue, # 201 Lachine, QC H8T 3G6 WEB SITE http:/www.pfi-institute.orgPFI Standard ES-44 |Denotes Revisio
3、n (Revised December 2013) DRAFTING PRACTICES STANDARD 1. Scope 1.1 This standard describes the basic recommended drafting practices for the pipe fabrication shop. 2. Context 2.1 The bulk of shop work is made up of prefabricated spools, which are pre-arranged piping components joined between designat
4、ed field connections. Before fabrication can commence in the workshop the spool has to be detailed on paper. The prime purpose of shop engineering is to: (A) Standardize the display of information to the shop floor to promote efficiency, (B) Minimize possible misunderstanding and error by shop perso
5、nnel during fabrication, (C) Aid in the resolution of conflicts within contract documents. It is recommended that the draftsperson use his own judgment and experience on whether to rotate the configuration so that clearer definition may be provided to shop personnel. 3. Standards 3.1 Spool Drawings
6、- The spool drawings should be detailed on an easy to handle form or paper size (i.e.; 8 1/2“ x 11“, 8 1/2“x 14“ or 11“ x 17“). The configurations are drawn in arrangement drawing (single or double line) or in single line/non-scale or isometric projection. Reasonably proportionate dimensioning betwe
7、en components should be used. Table 1 illustrates: Figure 1: Arrangement drawing (double line) Figure 2: Arrangement drawing (single line) Figure 3: Non-scale isometric drawing Figure 4: Conventional practice to show non-flanged joints 3.2 Spool drawing layout - The spool drawing layout must contain
8、 as a minimum, the following information: Customer name DIMENSION TOWARDTHE WELD CAP NOT FROM ITDIMENSION TOOF TEEPFI Standard ES-44 |Denotes Revision (Revised December 2013) Table 9: Bend SpoolWHEN BENDING IS COMPLETE IT IS THENREGARDED AS A FITTING AND INCORPORATEDINTO THE SPOOL AS SHOWN. THE PREC
9、ISEDEVELOPED LENGTH IS LISTED IN THEMATERIAL CALLOUT ALONG WITH THEANGLE OF BEND AND, IN TURN, CROSSREFERENCED TO THE BENDDETAILTO DIFFERENTIATE WITH ELBOW AND TOBE READILY RECOGNIZABLE, BEND MUSTBE SPOOLED USING A CURVED LINE.CARE MUST BE TAKEN TO SHOWTANGENT POINTS AND RADIUS INTHE CORRECT PLANETA
10、NGENT POINTS AND RADIUS SERVEAS A REFERENCE TO THE FABRICATIONSHOP IN THE EVENT TRIMMING ISREQUIREDBECURRENT INDEX OF 2014-2015 PFI STANDARDS A complete list of PFI members and available membership CHARTER MEMBERS CONTRACTOR MEMBERS ASSOCIATE MEMBERS AFFILIATE MEMBERS HONORARY MEMBERS Associate and
11、Affiliate member contributors Walter Sperko Sperko Engineering Services, Inc. Greensboro, NC Thomas Warrelmann Victaulic Company of America Easton, PA Sheryl Michalak Welding Outlets, Inc. Houston, TX PFI Standards and Technical Bulletins are published to serve proven needs of the pipe fabricating i
12、ndustry at the design level and in actual shop operations. Hence, such needs are continually considered and reviewed by the Engineering Committee of the Pipe Fabrication Institute to provide recommended procedures, which have been demonstrated by collective experiences to fulfill requirements in a manner for Code compliance. However, as the PFI Standards are for minimum requirements the designer or fabricator always has the option of specifying supplementary conditions in the form of requirements beyond the scope of the PFI publications.
