ASTM_E_2863_-_12.pdf

Designation:E286312Standard Practice forAcoustic Emission Examination of Welded Steel SpherePressure Vessels Using Thermal Pressurization1This standard is issued under the fixed designation E2863;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This practice is commonly used for periodic inspectionand testing of welded steel gaseous spheres(bottles)is theacoustic emission(AE)method.AE is used in place ofhydrostatic volumetric expansion testing.The periodic inspec-tion and testing of bottles by AE testing is achieved withoutdepressurization or contamination as is required for hydrostaticvolumetric expansion testing.1.2 The required test pressurization is achieved by heatingthe bottle in an industrial oven designed for this purpose.Themaximum temperature needed to achieve the AE test pressureis 250F(121C).1.3 AE monitoring of the bottle is performed with multiplesensors during the thermal pressurization.1.4 This practice was developed for periodic inspection andtesting of pressure vessels containing Halon(UN 1044),whichis commonly used aboard commercial aircraft for fire suppres-sion.In commercial aircraft,these bottles are hermeticallysealed by welding in the fill port.Exit ports are opened byexplosively activated burst disks.The usage of these pressurevessels in transportation is regulated under US Department ofTransportation(DOT),Code of Federal Regulations CFR 49.ADOT special permit authorizes the use of AE testing forperiodic inspection and testing in place of volumetric expan-sion and visual inspection.These bottles are spherical withdiameters ranging from 5 to 16 in.(127 to 406 mm).1.5 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are mathemati-cal conversions to SI units that are provided for informationonly and are not considered standard.1.6 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 ExaminationsE2075 Practice for Verifying the Consistency of AE-SensorResponse Using an Acrylic RodE2374 Guide for Acoustic Emission System PerformanceVerification2.2 ASNT Standards:3SNT-TC-1A Recommended Practice for NondestructiveTesting Personnel Qualification and CertificationANSI/ASNT CP-189 Standard for Qualification and Certifi-cation of Nondestructive Testing Personnel2.3 Code of Federal Regulations:Section 49 Code of Federal Regulations,Hazardous Materi-als Regulations of the Department of Transportation,Paragraphs 173.34,173.301,178.36,178.37,and 178.4542.4 Compressed Gas Association Standard:Pamphlet C-5 Service Life,Seamless High Pressure Cylin-ders53.Terminology3.1 DefinitionsSee Terminology E1316 for general termi-nology applicable to this test method.1This 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 2011.Last previous edition approved in 2011 as E2863-11.DOI:10.1520/E2863-12.2For 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 U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.5Available from Compressed Gas Association(CGA),4221 Walney Rd.,5thFloor,Chantilly,VA 20151-2923,http:/.*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 3.2 Definitions of Terms Specific to This Standard:3.2.1 marked service pressurepressure for which a vesselis rated.Normally,this value is stamped on the vessel4.Summary of Practice4.1 Acoustic emission(AE)sensors are mounted on apressure vessel,and emission is monitored while the pressurevessel is heated to a pre-determined temperature for achievingthe desired AE test