1、Specification for Independent Wellhead EquipmentAPI SPECIFICATION 11IWFIRST EDITION,JUNE 2000REAFFIRMED APRIL 2008 Specification for IndependentWellhead Equipment Upstream Segment API SPECIFICATION 11IWFIRST EDITION,JUNE 2000 SPECIAL NOTES API publications necessarily address problems of a general n
2、ature.With respect to partic-ular circumstances,local,state,and federal 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 a
3、nd precautions,nor undertaking their obligations under local,state,or 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 mate
4、rial safety data sheet.Nothing contained in any API publication is to be construed as granting any right,byimplication or otherwise,for the manufacture,sale,or use of any method,apparatus,or prod-uct covered by letters patent.Neither should anything contained in the publication be con-strued as insu
5、ring anyone against liability for infringement of letters patent.Generally,API standards are reviewed and revised,reaffirmed,or withdrawn at least every5 years.Sometimes a one-time extension of up to 2 years will be added to this review cycle.This publication will no longer be in effect 5 years afte
6、r its publication date as an operativeAPI standard or,where an extension has been granted,upon republication.Status of the pub-lication can be ascertained from the API Upstream Segment telephone(202)682-8000.Acatalog of API publications and materials is published annually and updated quarterly byAPI
7、,1220 L Street,N.W.,Washington,D.C.20005.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 of this standard or
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9、ny part of the material published herein should also beaddressed to the general manager.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 engineering judgment
10、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 standard is sol
11、ely responsible for complying with all the applicablerequirements of that standard.API does not represent,warrant,or guarantee that such prod-ucts do in fact conform to the applicable API standard.All rights reserved.No part of this work may be reproduced,stored in a retrieval system,or transmitted
12、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 2000 American Petroleum Institute FOREWORD This specification for independent wel
13、lhead equipment was formulated by the API Explo-ration and Production Department Subcommittee on Standardization of Field OperatingEquipment.This specification provides for a family of independent wellhead equipment foruse at the wellhead in the production of oil and gas.This standard shall become e
14、ffective on the date printed on the cover but may be used vol-untarily from the date of distribution.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
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16、s are invited and should be submitted to the general manager of theUpstream Segment,American Petroleum Institute,1220 L Street,N.W.,Washington,D.C.20005.iii CONTENTS Page 1SCOPE.11.1Purpose.11.2Applications.12REFERENCED PUBLICATIONS.12.1General.12.2Requirements.12.3Equivalent Standards.12.4Appendices.12.5Documents.12.6Abbreviations.63DEFINITIONS.64DESIGN AND PERFORMANCEGENERAL REQUIREMENTS.74.1Performance Requirements.74.2Service Conditions.74.3Design Methods.84.4Miscellaneous Design Information