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Piping Inspection Code: In-service Inspection, Rating, Repair, and Alteration of Piping Systems API570 FIFTH EDITION, FEBRUARY 2024 API American Petroleum Institute No reproduction or networking permited without license from Accuris Special Notes APl 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 APl publications is voluntary. In some cases, third parties or authorities having jurisdiction may choose to incorporate API standards by reference and may mandate compliance. 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 APl nor any of API's infringe upon privately owned rights. APl 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. APl publications are published to facilitate the broad availability of proven, sound engineering and operating regarding when and where these publications should be utilized. The formulation and publication of APl 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 APl standard is solely responsible for complying with all the applicable requirements of that standard. APl does Classified areas may vary depending on the location, conditions, equipment, and substances involved in any given situation. Users of this Standard should consult with the appropriate authorities having jurisdiction. Users of this standard should not rely exclusively on the information contained in this document. Sound business, scientific, engineering, and safety judgment should be used in employing the information contained herein. APl is not undertaking to meet the duties of employers, manufacturers, or suppliers to warn and properly train and equip their employees, and others exposed, concerning health and safety risks and precautions, nor undertaking their obligations to comply with authorities having jurisdiction. Information concerning safety and health risks and proper precautions with respect to materials and conditions should be obtained from the employer, the manufacturer or supplier of that material, or the material safety data sheet. All rights reserved. No part of this work may be reproduced, translated, stored in a retrieval system, or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission from the publisher. Contact the publisher, API Publishing Services, 20o Massachusetts Avenue, NW, Suite 1100, Washington, DC 20001. Copyright @ 2024 American Petroleum Institute ii Nreroductionrneworking permitedwithout licensefrom Acuris Foreword Nothing contained in any APl publication is to be construed as granting any right, by implication or Neither should anything contained in the publication be construed as insuring anyone against liability for infringement of letters patent. The verbal forms used to express the provisions in this document are as follows. Shall: As used in a standard, “shall" denotes a minimum requirement in order to conform to the standard. in order to conform to the standard. May: As used in a standard, "may" denotes a course of action permissible within the limits of a standard. This document was produced under APl standardization procedures that ensure appropriate notification under which this public

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