ASTM_E_1901_-_13.pdf

Designation:E190113Standard Guide forDetection and Evaluation of Discontinuities by ContactPulse-Echo Straight-Beam Ultrasonic Methods1This standard is issued under the fixed designation E1901;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 guide covers procedures for the contact ultrasonicexamination of bulk materials or parts by transmitting pulsedultrasonic waves into the material and observing the indica-tions of reflected waves.This guide covers only examinationsin which one search unit is used as both transmitter andreceiver(pulse-echo).This guide includes general require-ments and procedures that may be used for detectingdiscontinuities,locating depth and distance from a point ofreference and for making a relative or approximate evaluationof the size of discontinuities as compared to a referencestandard.1.2 This guide complements Practice E114 by providingmore detailed procedures for the selection and calibration ofthe inspection system and for evaluation of the indicationsobtained.1.3 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.1.4 This guide does not purport to address all of the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this guide to establish the appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E114 Practice for Ultrasonic Pulse-Echo Straight-BeamContact TestingE127 Practice for Fabricating and Checking Aluminum Al-loy Ultrasonic Standard Reference BlocksE317 Practice for Evaluating Performance Characteristics ofUltrasonic Pulse-Echo Testing Instruments and Systemswithout the Use of Electronic Measurement InstrumentsE428 Practice for Fabrication and Control of Metal,Otherthan Aluminum,Reference Blocks Used in UltrasonicTestingE543 Specification for Agencies Performing NondestructiveTestingE1158 Guide for Material Selection and Fabrication ofReference Blocks for the Pulsed Longitudinal Wave Ul-trasonic Testing of Metal and Metal Alloy ProductionMaterialE1316 Terminology for Nondestructive Examinations2.2 ASNT Standard:SNT-TC-1A Recommended Practice for Personnel Qualifi-cation and Certification in Nondestructive Testing Person-nel32.3 ANSI/ASNT Standard:ANSI/ASNT CP-189 ASNT Standard for Qualification andCertification of Nondestructive Testing Personnel32.4 Aerospace Industries Association Document:NAS-410 NAS Certification and Qualification of Nonde-structive Test Personnel42.5 ISO Standard5ISO 9712 Non-destructive testing Qualification and cer-tification of NDT personnel3.Terminology3.1 DefinitionsFor definitions of terms used in this guide,see Terminology E1316.4.Basis for Application4.1 Contractual AgreementThe using parties shall agreeon the applicable procedural requirements,as listed herein,prior to the examination of any material.1This guide is under the jurisdiction of ASTM Committee E07 on Nondestruc-tive Testing and is the direct responsibility of Subcommittee E07.06 on UltrasonicMethod.Current edition approved Dec.1,2013.Published February 2014.Originallyapproved in 1997.Last previous edition approved in 2008 as E1901-08.DOI:10.1520/E1901-13.2For 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 from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from Aerospace Industries Association of America,Inc.(AIA),1000Wilson Blvd.,Suite 1700,Arlington,VA22209-3928,http:/www.aia-aerospace.org.5Available 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 4.1.1 Materials,sizes,and shapes examined,4.1.2 Stage of manufacture when examined(time of test),4.1.3 Surface finish requirements,4.1.4 Minimum equipment requirements,as in Table 1herein,4.1.5 Search unit size,frequency and type,4.1.6 Couplant,4.1.7 Automated turning,fixturing or scanning,or both,asapplicable,4.1.8 Type of reference block standards including surfacecurvature,4.1.9 Standardization details,including attenuation compen-sation and DAC techniques,4.1.10 The surfaces to be examined and the scanning path,4.1.11 Acceptance standards,4.1.12 Personnel certification level,