ASTM_E_1930_-_E_1930M_-_12.pdf

Designation:E1930/E1930M12Standard Practice forExamination of Liquid-Filled Atmospheric and Low-PressureMetal Storage Tanks Using Acoustic Emission1This standard is issued under the fixed designation E1930/E1930M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This practice covers guidelines for acoustic emission(AE)examinations of new and in-service aboveground storagetanks of the type used for storage of liquids.1.2 This practice will detect acoustic emission in areas ofsensor coverage that are stressed during the course of theexamination.For flat-bottom tanks these areas will generallyinclude the sidewalls(and roof if pressure is applied above theliquid level).The examination may not detect flaws on thebottom of flat-bottom tanks unless sensors are located on thebottom.1.3 This practice may require that the tank experience a loadthat is greater than that encountered in normal use.The normalcontents of the tank can usually be used for applying this load.1.4 This practice is not valid for tanks that will be operatedat a pressure greater than the examination pressure.1.5 It is not necessary to drain or clean the tank beforeperforming this examination.1.6 This practice applies to tanks made of carbon steel,stainless steel,aluminum and other metals.1.7 This practice may also detect defects in tank linings(forexample,high-bulk,phenolics and other brittle materials).1.8 AE measurements are used to detect and localize emis-sion sources.Other NDT methods may be used to confirm thenature and significance of the AE indications(s).Proceduresfor other NDT techniques are beyond the scope of this practice.1.9 Examination liquid must be above its freezing tempera-ture and below its boiling temperature.1.10 Superimposed internal or external pressures must notexceed design pressure.1.11 Leaks may be found during the course of this exami-nation but their detection is not the intention of this practice.1.12 UnitsThe values stated in either SI units or inch-pound units are to be regarded as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standards.1.13 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Specific precau-tionary statements are given in Section 8.2.Referenced Documents2.1 ASTM Standards:2E543 Specification for Agencies Performing NondestructiveTestingE650 Guide for Mounting Piezoelectric Acoustic EmissionSensorsE976 Guide for Determining the Reproducibility ofAcousticEmission Sensor ResponseE1316 Terminology for Nondestructive ExaminationsE2374 Guide for Acoustic Emission System PerformanceVerification2.2 ANSI/ASNT Standard:Recommended PracticeASNT SNT-TC-1A for Qualificationand Certification of Nondestructive Testing Personnel3ANSI/ASNT CP-189 Standard for Qualification and Certifi-cation of NDT Personnel32.3 ASME Standard:Section V,Article 12,Boiler&Pressure Vessel Code41This practice is under the jurisdiction of ASTM Committee E07 on Nonde-structive Testing and is the direct responsibility of Subcommittee E07.04 onAcoustic Emission Method.Current edition approved June 15,2012.Published July 2012.Originallyapproved in 1997.Last previous edition approved in 2007 as E1930-07.DOI:10.1520/E1930_E1930M-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available fromAmerican Society for Nondestructive Testing(ASNT),P.O.Box28518,1711 Arlingate Ln.,Columbus,OH 43228-0518,http:/www.asnt.org.4Available from American Society of Mechanical Engineers(ASME),ASMEInternational Headquarters,Three Park Ave.,New York,NY 10016-5990,http:/www.asme.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.4 AIA Document:NAS-410 Certification and Qualification of NondestructiveTesting Personnel53.Terminology3.1 Definitions:3.1.1 This practice makes use of definitions provided inTerminology E1316.Definitions for terms that do not appear inTerminology E1316 are given below.3.2 Definitions of Terms Specific to This Standard:3.2.1 AE activitythe presence of acoustic emission duringan examination.It is normally measured by one or more AEparameters such as number of hits,events,signal strength orAE cou