1、Specification for Steel Plates,Quenched-and-Tempered,for Offshore StructuresAPI SPECIFICATION 2YFIFTH EDITION,DECEMBER 2006EFFECTIVE DATE:JUNE 1,2007 REAFFIRMED,SEPTEMBER 2020Specification for Steel Plates,Quenched-and-Tempered,for Offshore StructuresUpstream SegmentAPI SPECIFICATION 2YFIFTH EDITION
2、,DECEMBER 2006EFFECTIVE DATE:JUNE 1,2007REAFFIRMED,SEPTEMBER 2020SPECIAL NOTESAPI publications necessarily address problems of a general nature.With respect to particular circumstances,local,state,and federal laws and regulations should be reviewed.Neither API nor any of APIs employees,subcontractor
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5、e Institute to assure the accuracy and reliability of the data contained in them;however,the Institute makes no representation,warranty,or guarantee in connection with this publication and hereby expressly disclaims any liability or responsibility for loss or damage resulting from its use or for the
6、 violation of any authorities having jurisdiction with which this publi-cation may conflict.API publications are published to facilitate the broad availability of proven,sound engineer-ing and operating practices.These publications are not intended to obviate the need for applying sound engineering
7、judgment regarding when and where these publications should be utilized.The formulation and publication of API publications is not intended in any way to inhibit anyone from using any other practices.Any manufacturer marking equipment or materials in conformance with the marking requirements of an A
8、PI standard is solely responsible for complying with all the applicable requirements 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 sys
9、tem,or transmitted by any means,electronic,mechanical,photocopying,recording,or otherwise,without prior written permission from the publisher.Contact the Publisher,API Publishing Services,200 Massachusetts Avenue,NW,Suite 1100,Washington,DC 20001.Copyright 2006 American Petroleum InstituteFOREWORDTh
10、is specification is under the jurisdiction of the API Subcommittee on Standardization of Offshore Structures.The purpose of this specification is to provide standards for the purchase of quenched-and-tempered steel plate suitable for use in welded offshore structures.Nothing in this specification sh
11、ould be interpreted as indicating a preference by the commit-tee for any material or process.In the selection of materials and processes,the purchaser must be guided by his experience and by the service for which the plate is intended.Changes from the previous edition are noted by bars in the margin
12、s.Shall:As used in a standard,“shall”denotes a minimum requirement in order to conform to the specification.Should:As used in a standard,“should”denotes a recommendation or that which is advised but not required in order to conform to the specification.Suggested revisions are invited and should be s
13、ubmitted to the Standards and Publications Department,API,200 Massachusetts Avenue,NW,Suite 1100,Washington,DC 20001,standardsapi.org.iii v CONTENTS 1 SCOPE.1 1.1 Coverage.1 1.2 Post Manufacturing Heating.1 1.3 Preproduction Qualification.2 2 REFERENCED DOCUMENTS.2 3 GENERAL REQUIREMENTS FOR DELIVER
14、Y.2 4 MANUFACTURING.3 4.1 Melting.3 4.2 Heat Treatment.3 5 CHEMICAL REQUIREMENTS.3 6 MECHANICAL REQUIREMENTS.5 7 NOTCH TOUGHNESS REQUIREMENTS.5 8 MARKING.6 APPENDIX A SUPPLEMENTARY REQUIREMENTS.7 APPENDIX B SUGGESTIONS FOR ORDERING API 2Y SPEC STEEL PLATE.11 APPENDIX C API MONOGRAM.13 Tables 1 Chemi
15、cal Requirements.4 2 Carbon Equivalent Maximums.4 3 Tensile Requirements.5 4 Notch Toughness Requirements Charpy V-Notch Testing.5 S2-1 Notch Toughness Requirements at Lower Temperatures Drop-Weight Testing S2-1 No-Break at 67F(55C)or Charpy Impact Testing.8 1 Specification for Steel Plates,Quenched
16、-and-Tempered,for Offshore Structures 1 Scope 1.1 COVERAGE This specification covers two grades of high strength steel plate for use in welded construction of offshore structures,in selected critical portions which must resist impact,plastic fatigue loading,and lamellar tearing.Grade 50 is covered in thicknesses up to 6 in.(150 mm)inclusive,and Grade 60 is covered in thicknesses up to 4 in.(100 mm)inclusive.1.1.1 It is intended that steel produced to Grade 50 of the basic API Spec 2Y,without Sup
