ANSI-ISA-5.4-1991 Instrument Loop Diagrams
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537B89C9785E4EBC9F53D8666666ADE5 |
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文件大小(MB)： |
0.4 |
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页数： |
22 |
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文件格式： |
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日期： |
2009-5-22 |
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购买： |
文本摘录（文本识别可能有误，但文件阅览显示及打印正常，pdf文件可进行文字搜索定位）：
Instrument Loop Diagrams,Approved 9 September 1991,ANSI/ISA–5.4–1991,Formerly ANSI/ISA–S5.4–1991,AMERICAN NATIONAL STANDARD,ISA The Instrumentation,Systems, and,Automation Society,–,TM,Copyright ?1991 by the Instrument Society of America. All rights reserved. Printed in the United,States of America. No part of this publication may be reproduced, stored in a retrieval system, or,transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or,otherwise), without the prior written permission of the publisher.,ISA,67 Alexander Drive,P.O. Box 12277,Research Triangle Park, North Carolina 27709,ANSI/ISA-5.4-1991, Instrument Loop Diagrams,ISBN 1-55617-227-3,ANSI/ISA-S5.4-1991 3,Preface,The information contained in the Preface and Forward is for information only and is not a part of,the standard.,This standard is prepared as part of the service of ISA toward a goal of uniformity in the field,of instrumentation. To be of real value, this document should not be static, but must be,subject to periodic review. Toward this end, the Society welcomes all comments and,criticisms, and request that they be addressed to the Secretary, Standards and Practices,Board, ISA, 67 Alexander Drive, P. O. Box 12277, Research Triangle Park, NC 27709.,Telephone (919) 549-8411, e-mail: standards@isa.org.,The ISA Standards and Practices Department is aware of the growing need for attention to the,metric system of units in general and the International System of Units (SI) in particular, in the,preparation of instrumentation standards. The Department is further aware of the benefits to,U.S.A. users of ISA standards of incorporating suitable references to the SI (and the metric,system) in their business and professional dealings with other countries. Toward this end, this,Department will try to introduce SI-acceptable metric units in all new and revised standards to the,greatest extent possible. The Metric Practice Guide, published by the Institute of Electrical and,Electronics Engineers as ANSI/IEEE Std. 268-1982, and future revisions will be the reference,guide for definitions, symbols, abbreviations, and conversion factors.,It is the policy of ISA to encourage and welcome the participation of all concerned individuals and,interests in the development of ISA standards. Participation in the ISA standards-making,process by an individual in no way constitutes endorsement by the employers of the individual, of,the ISA, or of any of the standards that ISA develops.,At the time it approved this standard revision, the ISA-S5.4 Committee had the following,members:,NAME COMPANY,W. Richard Shaw Stearns Roger*,Gerald V. Barta Dow Corning Corporation,William H. Cleary Stone & Webster,Richard L. Emerson Bechtel Power Corporation,Edward E. Olinek Stearns Roger*,Raymond Robertson PPG,Robert P. Larkin Ford, Bacon & Davis,J. Slavin Delmar Controls,John Lorenz Leeds & Northrup,Richard E. Terhune Consultant,Mike Wiley Lummus Crest,Thomas C. McAvinew Metropolitan Denver Sewage Disposal District,*One vote,4 ANSI/ISA-S5.4-1991,This recommended practice was approved for publication by the ISA Standards and Practices,Board in 1989.,NAME COMPANY,D. Bishop, Vice-President Chevron U.S.A. Inc.,N. Conger Fisher Controls Int'l. Inc.,C. Gross Eagle Technology,H. Hopkins Utility Products of Arizona,R. Jones Dow Chemical Company,A. McCauley Chagrin Valley Controls, Inc.,E. Nesvig ERDCO Engineering Corp.,R. Prescott Moore Products Company,D. Rapley Rapley Engineering Service,R. Reimer Allen-Bradley Company,J. Rennie Factory Mutual Research Corporation,W. Weidman Gilbert/Commonwealth, Inc.,J. Whetstone National Inst. of Standards & Technology,M. Widmeyer The Power Supply System,P. Bliss* Consultant,W. Calder III* The Foxboro Company,B. Christensen* Consultant,L. Combs* Consultant,R. Galley* Consultant,T. Harrison* Florida State University,R. Jones* Philadelphia Electric Company,R. Keller* Consultant,O. Lovett* Consultant,E. Magison* Honeywell, Inc.,R. Marvin* Consultant,W. Miller* Moore Products Company,J. Mock* Bechtel Western Power Corporation,G. Platt* Consultant,J. Williams* Stearns Catalytic Corporation,*Director Emeritus,ANSI/ISA-S5.4-1991 5,Foreword,Instrument loop diagrams are suitable for general use throughout industry. It is important to,consider their value for design, construction, checkout, start-up, operation, maintenance,rearrangement, and reconstruction. Benefits can include reduction in engineering costs,improved loop integrity and purchasing accuracy, and easier maintenance troubleshooting.,An instrument loop diagram can be effective on any size project from one or two loops up to large,and com……
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