_API_RP_45-1998_2012.pdf

Recommended Practice forAnalysis of Oilfield WatersRECOMMENDED PRACTICE 45THIRD EDITION,AUGUST 1998REAFFIRMED,JANUARY 2012ener:1AMERICAN PETROLEUM INSTITUTESPECIAL NOTESAPI 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against liability for infringement of letters patent.Generally,API standards are reviewed and revised,reaffirmed,or withdrawn at least everyfive years.Sometimes a one-time extension of up to two years will be added to this reviewcycle.This publication will no longer be in effect five 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 Exploration and Production Departmenttelephone(202)682-80001.A catalog of API publications and materials is published annu-ally and updated quarterly by API,1220 L Street,N.W.,Washington,D.C.20005.This document was produced under API standardization procedures that ensure appropri-ate notification and participation in the developmental process and is designated as an APlstandard.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 director of the Exploration and Production Department,American Petroleum Institute,1220 L Street,N.W.,Washington,D.C.20005.Requests forpermission to reproduce or translate all or any part of the material published herein shouldalso be addressed to the director.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,ortransmitted 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 1998 American Petroleum InstituteFOREWORDThese recommended practices were prepared by the API Subcommittee on Analysis ofOilfield Waters.This publication is under the administration of the American PetroleumInstitute Exploration and Production Departments Executive Committee on Drilling andProduction Operations.The first edition of RP 45,published as Tentativein November 1965,was developed bythe API Mid-Continent District Study Committee on Analysis of Oilfield Waters.Subse-quent to its publication,the Study Committee status was changed to a Subcommittee of theExecutive Committee on Drilling and Production Practices and charged with the responsibil-ity of continuing work in certain areas of interest to develop additional procedures for analy-sis of oilfield water analysis.The Second Edition,published in 1968 and reissued July 1981.contained revisions of,and additions to,First Edition procedures as well as a new section onSpectroscopic Methods.With the 1968 edition,this publication was advanced from aTentativeto a StandardRecommended Practice.This Third Edition supersedes andreplaces the Second Edition.Every effort has been made by aPI to assure the accuracy and reliability of informationcontained in this publication.However,API makes no representation,warranty,or guaranteein connection with publication of these recommended practices and hereby expressly dis-claims any liability or responsibility for loss or damage from use or applications hereunder orfor any violation of local,state.federal,or other law(s)and regulation(s)with which the con-tents may conflict;or for the infringement of any patent resulting from use of this publication.Individuals and organizations using this publication are cautioned that requirements offederal,state,local,and other laws and regulations are dynamic and constantly evolving andshould be reviewed to determine whether the information in this publication is consistentwith requirements of current applicable laws and regulations.Users of this publication arecautioned that operations and tests must comply with requirements of federal,state,or locallaws or regulations.These requirements should be reviewed to determine whether violationsmay occur.It is intended that these recommended practices serve as a guide to promote standards foranalysis of oilfield waters.Users of this publication are reminded that constantly-developingtechnology,equipment,specific company requirements and policy,and specialized or lim-ited operations do not permit coverage of all possible analyses,practices,or alternatives.This publication is not so comprehensive as to present all of the practices for analysis of oil-field waters.Alternative procedures and/or equipment are available and routinely utilized tomeet or exceed practices or performance levels set forth herein.Procedures presented in thispublication are not intended to inhibit developing technology and equipment improvementsor improved operating procedures or analyses.This publication,or portion thereof,cannot besubstituted for qualified technical/operations analysis and judgement.API publications may be used by anyone desiring to do so.Every effort has been made bythe Institute to assure the accuracy and reliability of the data contained in them;however,theInstitute makes no representation,warranty,or guarantee in connection with this publicationand hereby expressly disclaims any liability or responsibility for loss or damage resultingfrom its use or for the violation of any federal,state,or municipal regulation with which thispublication may conflict.Suggested revisions are invited and should be submitted to the director of the Explorationand Production Department,American Petroleum Institute,1220 L Street,N.W.,Washing-ton,D.C.20005.