ASTM_E_1736_-_15.pdf

Designation:E173615Standard Practice forAcousto-Ultrasonic Assessment of Filament-WoundPressure Vessels1This standard is issued under the fixed designation E1736;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 covers a procedure for acousto-ultrasonic(AU)assessment of filament-wound pressure vessels.Guide-lines are given for the detection of defect states and flawpopulations that arise during materials processing or manufac-turing or upon exposure to aggressive service environments.Although this practice describes an automated scanning mode,similar results can be obtained with a manual scanning mode.1.2 This procedure recommends technical details and rulesfor the reliable and reproducible AU detection of defect statesand flaw populations.The AU procedure described herein canbe a basis for assessing the serviceability of filament-woundpressure vessels.1.3 The objective of the AU method is primarily theassessment of defect states and diffuse flaw populations thatinfluence the mechanical strength and ultimate reliability offilament-wound pressure vessels.The AU approach and probeconfiguration are designed specifically to determine compositeproperties in lateral rather than through-the-thickness direc-tions.21.4 The AU method is not for flaw detection in the conven-tional sense.The AU method is most useful for materialscharacterization,as explained in Guide E1495,which gives therationale and basic technology for the AU method.Flaws anddiscontinuities such as large voids,disbonds,or extended lackof contact of interfaces can be found by other nondestructiveexamination(NDE)methods such as immersion pulse-echoultrasonics.1.5 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are included in thispractice.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.2.Referenced Documents2.1 ASTM Standards:3E543 Specification for Agencies Performing NondestructiveTestingE1001 Practice for Detection and Evaluation of Discontinui-ties by the Immersed Pulse-Echo Ultrasonic MethodUsing Longitudinal WavesE1067 Practice forAcoustic Emission Examination of Fiber-glass Reinforced Plastic Resin(FRP)Tanks/VesselsE1316 Terminology for Nondestructive ExaminationsE1495 Guidefor Acousto-Ultrasonic AssessmentofComposites,Laminates,and Bonded Joints2.2 ASNT Standards:4ANSI/ASNT CP-189 Personnel Qualification and Certifica-tion in Nondestructive TestingASNT SNT-TC-1A Personnel Qualification and Certifica-tion in Nondestructive Testing2.3 AIA Standard:5NAS-410 Certification and Qualification of NondestructiveTest Personnel2.4 ISO Standard:6ISO 9712 Non-destructive TestingQualification and Cer-tification of NDT Personnel3.Terminology3.1 DefinitionsRelevant terminology and nomenclatureare defined in Terminology E1316 and Guide E1495.1This 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 1,2015.Published June 2015.Originallyapproved in 1995.Last previous edition approved in 2010 as E1736-10.DOI:10.1520/E1736-15.2Vary,A.,“Acousto-Ultrasonics,”Nondestructive Testing of Fibre-ReinforcedPlastics Composites,Vol 2,J.Summerscales,ed.,Elsevier Science Publishers Ltd.,Barking,Essex,England,1990,Chapter 1,pp.1-54.3For 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.4Available fromAmerican Society for Nondestructive Testing(ASNT),P.O.Box28518,1711 Arlingate Ln.,Columbus,OH 43228-0518,http:/www.asnt.org.5Available from Aerospace Industries Association of America,Inc.(AIA),1000Wilson Blvd.,Suite 1700,Arlington,VA22209-3928,http:/www.aia-aerospace.org.6Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,CP 56,CH-1211 Geneva 20,Switzerland,http:/www.iso.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 3.2 Definitions of Terms Specific to This Standard:3.2.1 composite shella multilayer filament-winding thatcomprises a second shell that reinforces the inner shell.Thecomposite shell consists of continuous fibers,impregnated witha matrix material,wound around the inner shell,and cured inplace.An example is the Kevlar-epoxy filament-wound spheri-