1、标准分享网一免费标准下载站Butterfly Valves:Double Flanged,Lug-andWafer-TypeAPI STANDARD 609SIXTH EDITION,MAY 2004AmericanPetroleumInstituteHelping YouGet The JobDone Right.SPECIAL NOTESAPI publications necessarily address problems of a general nature.With respect to partic-ular circumstances,local,state,and fede
2、ral laws and regulations should be reviewed.API is not undertaking to meet the duties of employers,manufacturers,or suppliers towarn and properly train and equip their employees,and others exposed,concerning healthand safety risks and precautions,nor undertaking their obligations under local,state,o
3、r fed-eral laws.Information concerning safety and health risks and proper precautions with respect to par-ticular materials and conditions should be obtained from the employer,the manufacturer orsupplier of that material,or the material safety data sheet.Nothing contained in any API publication is t
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5、erally,API standards are reviewed and revised,reaffirmed,or withdrawn at least everyfive years.Sometimes a one-time extension of up to two years will be added to this reviewcycle.This publication will no longer be in effect five years after its publication date as anoperative API standard or,where a
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7、ts,15 Inv-erness Way East,M/S C303B,Englewood,CO 80112-5776.This document was produced under API standardization procedures that ensure appropri-ate notification and participation in the developmental process and is designated as an APIstandard.Questions concerning the interpretation of the content
8、of this standard or com-ments and questions concerning the procedures under which this standard was developedshould be directed in writing to the Director of the Standards department,American Petro-leum Institute,1220 L Street,N.W.,Washington,D.C.20005.Requests for permission toreproduce or translat
9、e all or any part of the material published herein should be addressed tothe Director,Business Services.API standards are published to facilitate the broad availability of proven,sound engineer-ing and operating practices.These standards are not intended to obviate the need for apply-ing sound engin
10、eering judgment regarding when and where these standards should beutilized.The formulation and publication of API standards is not intended in any way toinhibit anyone from using any other practices.Any manufacturer marking equipment or materials in conformance with the markingrequirements of an API
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12、,ortransmitted by any means,electronic,mechanical,photocopying,recording,or otherwise,without prior written permission from the publisher.Contact the Publisher.API Publishing Services,1220 L Street,N.W.,Washington,D.C.20005.Copyright C 2004 American Petroleum InstituteFOREWORDThis standard is a purc
13、hase specification for butterfly valves designed for installationbetween flanges specified in ASME B16.1,B16.5,B16.24,and B16.42.Classes 125-600;MSS SP-44,Class 150;and ASME B16.47 Series A,Class 150(was MSS SP-44 except forcertain materials)or Series B(was API 605).Class 150 for the NPS sizes defin
14、ed herein.This standard requires the purchaser to specify certain details and features.Although it isrecognized that the purchaser may desire to modify,delete,or amplify sections of this stan-dard,it is strongly recommended that such modifications,deletions,and amplifications bemade by supplementing
15、 this standard,rather than by rewriting or incorporating sectionsthereof into another complete standard.API standards are published as an aid to procurement of standardized equipment andmaterials.These standards are not intended to inhibit purchasers or producers from purchas-ing or producing produc
16、ts made to specifications other than those of API.API publications may be used by anyone desiring to do so.Every effort has been made bythe Institute to assure the accuracy and reliability of the data contained in them;however,theInstitute makes no representation,warranty,or guarantee in connection
17、with this publicationand hereby expressly disclaims any liability or responsibility for loss or damage resultingfrom its use or for the violation of any federal,state,or municipal regulation with which thispublication may conflict.Suggested revisions are invited and should be submitted to API,Standards department,1220 L Street,NW,Washington,DC 20005.今
