ASTM_B_548_-_03_2017.pdf

Designation:B54803(Reapproved 2017)Standard Test Method forUltrasonic Inspection of Aluminum-Alloy Plate for PressureVessels1This standard is issued under the fixed designation B548;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.Scope1.1 This test method covers pulse-echo ultrasonic inspectionof aluminum-alloy plate of thickness equal to or greater than0.500 in.(12.7 mm)for use in the fabrication of pressurevessels.The ultrasonic test is employed to detect gross internaldiscontinuities oriented in a direction parallel to the rolledsurface such as cracks,ruptures,and laminations,and toprovide assurance that only plate that is free from rejectablediscontinuities is accepted for delivery.1.2 The inspection method and acceptance criteria includedin this standard shall be limited to plate of the followingaluminum alloys:1060,1100,3003,Alclad 3003,3004,Alclad3004,5050,5052,5083,5086,5154,5254,5454,5456,5652,6061,and Alclad 6061.1.3 This test method applies only to ultrasonic tests usingpulsed longitudinal waves which are transmitted and receivedby a search unit containing either a single crystal or acombination of electrically interconnected multiple crystals.Ultrasonic tests employing either the through-transmission orthe angle-beam techniques are not included.1.4 This test method shall be used when ultrasonic inspec-tion as prescribed herein is required by the contract,purchaseorder,or referenced plate specification.1.5 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand 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.1.7 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 The following documents of the issue in effect on dateof material purchase form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2E114 Practice for Ultrasonic Pulse-Echo Straight-BeamContact TestingE214 Practice for Immersed Ultrasonic Testing by the Re-flection Method Using Pulsed Longitudinal Waves(With-drawn 2007)3E317 Practice for Evaluating Performance Characteristics ofUltrasonic Pulse-Echo Testing Instruments and Systemswithout the Use of Electronic Measurement Instruments2.3 Other Standards:ASNT Recommended Practice for Nondestructive TestingPersonnel Qualification and CertificationUltrasonicTesting MethodSNT-TC-1A43.Summary of Method3.1 The plate is inspected ultrasonically by scanning onerolled surface with a beam of pulsed longitudinal waves whichis oriented in a direction perpendicular to the entry surface ofthe plate.The ultrasound is transmitted into the plate either bythe direct contact,immersion,or liquid-column couplingmethod.During the scan,an indication representing the firstback reflection is observed on the A-scan screen of the testinstrument.3.2 When the test system sensitivity level is appropriatelyadjusted,a discontinuity is detected during the scan by noting1This test method is under the jurisdiction of ASTM Committee B07 on LightMetals and Alloys and is the direct responsibility of Subcommittee B07.03 onAluminum Alloy Wrought Products.Current edition approved July 1,2017.Published July 2017.Originally approvedin 1971.Last previous edition approved in 2009 as B548 03(2009).DOI:10.1520/B0548-03R17.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.4Available fromAmerican Society for Nondestructive Testing(ASNT),P.O.Box28518,1711 Arlingate Ln.,Columbus,OH 43228-0518,http:/www.asnt.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 an isolated indi