1、Materials and Fabrication Requirements for 2-1/4Cr-1Mo&3Cr-1Mo Steel Heavy Wall Pressure Vessels for High Temperature,High Pressure Hydrogen ServiceAPI RECOMMENDED PRACTICE 934FIRST EDITION DECEMBER 2000Materials and Fabrication Requirements for 2 1/4Cr-1Mo&3Cr-1Mo Steel Heavy Wall Pressure Vessels
2、for High Temperature,High Pressure Hydrogen ServiceAPIDownstream SegmentRECOMMENDED PRACTICE 934FIRST EDITION DECEMBER 2000 SPECIAL NOTES API publications necessarily address problems of a general nature.With respect to partic-ular circumstances,local,state,and federal laws and regulations should be
3、 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,or fed-eral laws.Information concer
4、ning 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 to be construed as granting any rig
5、ht,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 insuring anyone against liability for infringement of letters patent.Generally,API standards are reviewed
6、and revised,reaffirmed,or withdrawn at least everyfive years.Sometimes a one-time extension of up to two years will be added to this reviewcycle.This publication will no longer be in effect five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 an extension has been granted,upon
7、republication.Statusof the publication can be ascertained from the Standardization Manager telephone(202)682-8000.A catalog of API publications and materials is published annually and updatedquarterly by API,1220 L Street,N.W.,Washington,D.C.20005.This document was produced under API standardization
8、 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 com-ments and questions concerning the procedures under which this standard was developedsho
9、uld be directed in writing to the Standardization Manager,American Petroleum Institute,1220 L Street,N.W.,Washington,D.C.20005.Requests for permission to reproduce ortranslate all or any part of the material published herein should also be addressed to the man-ager of API publications.API standards
10、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 regarding when and where these standards should beutilized.The formulation and publication of API stan
11、dards 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 solely responsible for complying with all the applicablerequirements of that standard.API does not repres
12、ent,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 by any means,electronic,mechanical,photocopying,recording,or otherwise,without prior written permissio
13、n from the publisher.Contact the Publisher,API Publishing Services,1220 L Street,N.W.,Washington,D.C.20005.Copyright 2001 American Petroleum Institute FOREWORD API publications may be used by anyone desiring to do so.Every effort has been made bythe Institute to assure the accuracy and reliability o
14、f the data contained in them;however,theInstitute makes no representation,warranty,or guarantee in connection 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
15、 with which thispublication may conflict.Suggested revisions are invited and should be submitted to the Standardization Manager,American Petroleum Institute,1220 L Street,N.W.,Washington,D.C.20005.iii CONTENTS Page 1INTRODUCTION.11.1Scope.12REFERENCES.13DEFINITIONS.23.1Definitions.23.2Acronyms.24DES
16、IGN.25BASE METAL REQUIREMENTS.35.1Material Specifications.35.2Steel Making Practice.35.3Chemical Composition Limits.35.4Heat Treatment.35.5Mechanical Properties.36WELDING CONSUMABLE REQUIREMENTS.46.1Material Requirements.46.2Mechanical Properties.47WELDING,HEAT TREATMENT AND PRODUCTION TESTING.57.1General Welding Requirements.57.2Base Metal Welding.57.3Weld Overlay.77.4Final PWHT.88NONDESTRUCTIVE EXAMINATION(NDE).88.2NDE Prior to Fabrication.88.3NDE During Fabrication.88.4NDE After Fabrication a
