_RP_49-2001_2013.pdf

Recommended Practice for Drilling and Well Servicing Operations Involving Hydrogen SulfideAPI RECOMMENDED PRACTICE 49THIRD EDITION,MAY 2001REAFFIRMED,JANUARY 2013Recommended Practice for Drilling and Well Servicing Operations Involving Hydrogen SulfideUpstream SegmentAPI RECOMMENDED PRACTICE 49THIRD EDITION,MAY 2001REAFFIRMED,JANUARY 2013 SPECIAL NOTES API publications necessarily address problems of a general nature.With respect to partic-ular circumstances,local,state,and federal laws and regulations should be reviewed.API is not undertaking to meet the duties of employers,manufacturers,or suppliers towarn and properly train and equip their employees,and others exposed,concerning healthand safety risks and precautions,nor undertaking their obligations under local,state,or fed-eral laws.Information concerning safety and health risks and proper precautions with respect to par-ticular materials and conditions should be obtained from the employer,the manufacturer orsupplier of that material,or the material safety data sheet.Nothing contained in any API publication is to be construed as granting any right,byimplication or otherwise,for the manufacture,sale,or use of any method,apparatus,or prod-uct covered by letters patent.Neither should anything contained in the publication be con-strued as insuring anyone against liability for infringement of letters patent.Generally,API standards are reviewed and revised,reafrmed,or withdrawn at least everyve years.Sometimes a one-time extension of up to two years will be added to this reviewcycle.This publication will no longer be in effect ve years after its publication date as anoperative API standard or,where an extension has been granted,upon republication.Statusof the publication can be ascertained from the API Upstream Segment telephone(202)682-8000.A catalog of API publications and materials is published annually and updated quar-terly by API,1220 L Street,N.W.,Washington,D.C.20005.This document was produced under API standardization procedures that ensure appropri-ate notication and participation in the developmental process and is designated as an APIstandard.Questions concerning the interpretation of the content of this standard or com-ments and questions concerning the procedures under which this standard was developedshould be directed in writing to the standardization manager,American Petroleum Institute,1220 L Street,N.W.,Washington,D.C.20005.Requests for permission to reproduce ortranslate all or any part of the material published herein should also be addressed to the gen-eral manager.API standards are published to facilitate the broad availability of proven,sound engineer-ing and operating practices.These standards are not intended to obviate the need for apply-ing sound engineering judgment regarding when and where these standards should beutilized.The formulation and publication of API standards is not intended in any way toinhibit anyone from using any other practices.Any manufacturer marking equipment or materials in conformance with the markingrequirements of an API standard is solely responsible for complying with all the applicablerequirements 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 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 2001 American Petroleum Institute FOREWORD This recommended practice was prepared by the API Subcommittee on Oil and Gas WellDrilling and Servicing Involving Hydrogen Sulde.This standard is under the administra-tion of the American Petroleum Institute Upstream Departments Executive Committee onDrilling and Production Operations.It is intended that these voluntary recommended practices serve as a guide to promote andmaintain integrity of oil and gas well drilling and servicing facilities and operations in theinterest of public safety,personnel safety,and protection of the environment.Users of thispublication are reminded that constantly developing technology,specic company require-ments and policy,and specialized or limited operations do not permit coverage of all possi-ble operations,practices,or alternatives.This standard is not so comprehensive as to presentall of the recommended practices for oil and gas well drilling and servicing operationsinvolving hydrogen sulde.Alternative operating procedures and/or equipment are availableand routinely used to meet or exceed recommended practices or performance levels set forthherein.Recommendations presented in this publication are based on industry experience andexpertise involving a wide range of operating locations and conditions.Recommendationspresented in this publication are not intended to inhibit developing techno