1、Pulsation and Vibration Control in Positive Displacement Machinery Systems for Petroleum,Petrochemical,and Natural Gas Industry ServicesAPI RECOMMENDED PRACTICE 688 FIRST EDITION,APRIL 2012REAFFIRMED,JULY 2021Special NotesAPI publications necessarily address problems of a general nature.With respect
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9、s,equipment,and substances involved in any given situation.Users of this Recommended Practice should consult with the appropriate authorities having jurisdiction.Users of this Recommended Practice should not rely exclusively on the information contained in this document.Sound business,scientific,eng
10、ineering,and safety judgment should be used in employing the information contained herein.All rights reserved.No part of this work may be reproduced,translated,stored in a retrieval system,or transmitted by any means,electronic,mechanical,photocopying,recording,or otherwise,without prior written per
11、mission from the publisher.Contact the Publisher,API Publishing Services,200 Massachusetts Avenue,NW,Suite 1100,Washington,DC 20001.Copyright 2012 American Petroleum InstituteForewordThis document is intended to describe,discuss and clarify the design of pulsation and vibration control for positive
12、displacement machinery systems used for services in the petroleum,petrochemical and natural gas industries.The original focus of this document was to provide insight on the many changes to the pulsation and vibration material in the Clause 7.9 of the 5th Edition of API 618 for reciprocating compress
13、ors only.Due to industry interest,the scope of this document has been expanded to include other types of positive displacement equipment(such as pumps and screw compressors).However,due to publication schedules,these other types of positive displacement equipment will be addressed in future editions
14、.This document is not intended to be an all-inclusive source of information for this complex subject.Rather,it is offered as an introduction to the major aspects of pulsation and vibration control for positive displacement machinery addressed during a typical system design.A significant amount of th
15、e material has been extracted from documents previously published by the contributors.The different design philosophies of the various contributors are consolidated in this document to help users understand the choices available and make informed decisions about what is appropriate for their applica
16、tion.While the theory is generally applicable to all types of positive displacement machinery,the text in this edition will frequently refer specifically to reciprocating compressors.Nothing contained in any API publication is to be construed as granting any right,by implication or otherwise,for the manufacture,sale,or use of any method,apparatus,or product covered by letters patent.Neither should anything contained in the publication be construed as insuring anyone against liability for infring
