API Spec 6D-2022 阀门规范 Specification for Valves.pdf

Specification for Valves API SPECIFICATION 6D TWENTY-FIFTH EDITION NOVEMBER 2021 API MONOGRAM PROGRAM EFFECTIVE DATE:NOVEMBER 2022 ERRATA 1 DECEMBER 2021 ERRATA 2 APRIL 2022 AP American Petroleum Institute Special Notes API publications necessarily address problems of a general nature.With respect to particular circumstances local state and federal laws and regulations should be reviewed.The use of API publications is voluntary.In some cases third parties or authorities having jurisdiction may choose to incorporate API standards by reference and may mandate pliance. Neither API nor any of API's employees subcontractors consultants mittees or other assignees make any warranty or representation either express or implied with respect to the accuracy pleteness or usefulness of the information contained herein or assume any liability or responsibility for any use or the results of such use of any information or process disclosed in this publication.Neither API nor any of API's employees subcontractors consultants or other assignees represent that use of this publication would not infringe upon privately owned rights. API publications may be used by anyone desiring to do so.Every effort has been made by the 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 re...