Inspection Practices for Piping System Components APIRECOMMENDEDPRACTICE574 FIFTHEDITION,FEBRUARY2024 API American Petroleum Institute Special Notes API s necessarily address problems of a general nature. With respect to particular publications circumstances, local, state, and federal laws and regulations should be reviewed. The use of APl publications is voluntary. In some cases, third parties or authorities having jurisdiction may choose to results of such use, of any information or process disclosed in this publication. Neither API nor any of API's employees, subcontractors,consultants,orotherassignees representthat use ofthis publicationwould 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 ensure 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 violation of any authorities having jurisdiction with which this publication may conflict. All rights reserved. No part of this work may be reproduced, translated, stored in a retrieval system, or permission from the publisher.Contact the publisher, API Publishing Services, 200 Massachusetts Avenue, NW, Suite 1100, Washington, DC 20001. Copyright2024AmericanPetroleumInstitute ii Foreword Nothing contained in any APl publication is to be construed as granting any right, by implication or infringement of letters patent. Theverbalformsusedtoexpresstheprovisionsinthisdocumentareasfollows Shall: As used in a standard, "shal' denotes a minimum requirement in order to conform to the standard. Should: As used in a standard,"should" denotes a recommendation or that which is advised but not required in order to conform to the standard. May:Asusedinastandard,"may"denotesa course ofactionpermissiblewithinthe limits ofa standard Can: As used in a standard, "can" denotes a statement of possibility or capability. This document was produced under API standardization procedures that ensure appropriate notification and participation in the developmental process andis designatedas an APIstandard.Questions concerning underwhichthispublicationwasdevelopedshouldbedirectedinwritingtotheDirectorofStandards, AmericanPetroleum Institute,200MassachusettsAvenue,NW,Suite1100,Washington,DC20001 also be addressed to the director. Generally,APlstandards are reviewed and revised,reaffirmed,or withdrawnatleast everyfiveyears.A ascertained from the API Standards Department, telephone (202) 682-8000.A catalog of APl publications andmaterials is published annually by APl, 200 Massachusetts Avenue, NW, Suite 1100, Washington, DC 20001. Suggested revisions are invited and should be s submitted to the Standards Department,APl,200 MassachusettsAvenue,NW,Suite1100,Washington,Dc20001,[email protected] ii