_RP_1117-2008_2018.pdf

Recommended Practice for Movement in In-service PipelinesAPI RECOMMENDED PRACTICE 1117THIRD EDITION,JULY 2008ERRATA 1,DECEMBER 2008ERRATA 2,AUGUST 2009REAFFIRMED,MARCH 2018Recommended Practice for Movement in In-service PipelinesPipeline SegmentAPI RECOMMENDED PRACTICE 1117THIRD EDITION,JULY 2008ERRATA 1,DECEMBER 2008ERRATA 2,AUGUST 2009REAFFIRMED,MARCH 2018Special 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,subcontractors,consultants,committees,or other assignees make any warranty or representation,either express or implied,with respect to the accuracy,completeness,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 APIs employees,subcontractors,consultants,or other assignees represent that use of this publication would not infringe upon privately owned rights.Classified areas may vary depending on the location,conditions,equipment,and substances involved in any given situation.Users of this recommended practice should consult with the appropriate authorities having jurisdiction.Users of this recommended practice 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.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 resulting from its use or for the violation of any authorities having jurisdiction with which this publication may conflict.API publications are published to facilitate the broad availability of proven,sound engineering and operating practices.These publications are not intended to obviate the need for applying sound engineering 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 API standard is solely responsible for complying with all the applicable requirements of that standard.API does not represent,warrant,or guarantee that such products 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 permission from the publisher.Contact the Publisher,API Publishing Services,1220 L Street,N.W.,Washington,D.C.20005.Copyright 2008 American Petroleum InstituteForewordThe few pipeline failures that have followed movement operations demonstrate the need for an industry recommended practice on movement of pipelines.A movement operation increases the longitudinal stress in the segment of the pipeline being moved.In most cases this additional stress has caused no significant problems.In 1978,however,a propane pipeline failed after being moved while in service.Although the movement may not have contributed to the failure,the incident demonstrated the need for uniform guidelines to ensure that the movement of an in-service pipeline is done with reasonable safety.Consequently,the American Society of Mechanical Engineers,the American Petroleum Institute,and the Office of Pipeline Safety Regulation of the U.S.Department of Transportation jointly sponsored a study to establish guidelines for safely moving pipelines without taking them out of service.After the release of the“Guidelines for Lowering Pipelines While in Service”by authors at the Battelle Columbus Laboratories,the American Petroleum Institute solicited qualified engineers responsible for the design,construction,and operation of petroleum pipelines to review the Battelle work and other available work and to prepare an industry recommended practice on the safe lowering and/or raising of in-service pipelines.The purpose of this recommended practice is to address the criteria,methods,values,and recommendations that should be considered in the design and execution of practical and safe pipeline-movement operations.However,it is impossible to foresee all possible pipeline-movement situations or circumstances.This recommended practice is to be used as a guide for moving pipelines while they remain in service.It is not a rigid standard.This recommended practice is not intended to be an endorsement of moving pipelines as a method for addressing the safety of an existin