Designation: E1955 − 20 (Reapproved 2026)Standard Radiographic Examination forSoundness of Welds in Steel by Comparison to GradedASTM E390 Reference Radiographs 1This standard is issued under the f i xed designation E1955; 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 standard covers requirements for radiographicexamination for soundness of welds in fabricated steel bycomparison to selected severity levels of Reference Radio-graphs E390, Vol II. The base material varies from greater than0.25 in. to 3 in. (6.4 mm to 76 mm) inclusive in thickness.Volume II is applicable. This standard is not suitable forshipyard use.N OTE 1—This standard was adopted to replace Mil-Std. 1264-B,entitled “Radiographic Inspection For Soundness of Welds In Steel ByComparison To Graded ASTM E390 Reference Radiographs,” dated 18January, 1989. This standard is intended to be used for the sameapplications as the document which it replaced. Users should carefullyreview its requirements when considering the standard’s use for new ordifferent applications, or both.1.2 Units—The values stated in inch-pound units are to beregarded as standard. The values given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.1.3 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, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 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 ASTM Standards: 2E390 Reference Radiographs for Steel Fusion WeldsE1316 Terminology for Nondestructive Examinations2.2 Military Standards: 3NAS-410 Certif i cation and Qualif i cation of NondestructiveTest Personnel2.3 ASNT Standards: 4SNT-TC-1A Recommended Practice for Personnel Qualif i -cation and Certif i cation in Nondestructive TestingANSI/ASNT-CP-189 Standard for Qualif i cation and Certif i -cation of Nondestructive Testing Personnel2.4 AWS Standard: 5AWS D 1.1 Structural Welding Code Steel2.5 API Standard: 6API STD-1104 Standard for Welding Pipelines and RelatedFacilities2.6 AIA Document: 7NAS 410 Certif i cation & Qualif i cation of NondestructiveTest Personnel2.7 ANSI/ISO Standard: 8ISO 9712 NDT — Qualif i cation and Certif i cation of NDTPersonnel2.8 Adjuncts:Reference Radiographs for Steel Fusion Welds:Volume II, Thickness Over1 ⁄ 4 to 3 in. (6.4 to 76 mm), incl 93. Terminology3.1 Def i nitions—For def i nitions of terms used in thisdocument, see Terminology E1316.3.2 Def i nitions of Terms Specif i c to This Standard:1 This standard is under the jurisdiction of ASTM Committee E07 on Nonde-structive Testing and is the direct responsibility of Subcommittee E07.02 onReference Radiological Images.Current edition approved July 1, 2026. Published July 2026. Originally approvedin 1998. Last previous edition approved in 2020 as E1955 – 20. DOI: 10.1520/E1955-20R26.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at www.astm.org/contact. For Annual Book ofASTM Standards volume information, refer to the standard’s Document Summarypage on the ASTM website.3 Available from Aerospace Industries Association of America, Inc. (AIA), 1000Wilson Blvd., Suite 1700,Arlington, VA22209-3928, http://www.aia-aerospace.org.4 Available fromAmerican Society for Nondestructive Testing (ASNT), P.O. Box28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http://www.asnt.org.5 Available from American Welding Society (AWS), 550 NW LeJeune Rd.,Miami, FL 33126, http://www.aws.org.6 Available from American Petroleum Institute (API), 1220 L. St., NW,Washington, DC 20005-4070, http://www.api.org.7 Available from Aerospace Industries Association (AIA), 1000 Wilson Blvd.,Suite 1700, Arlington, VA 22209, http://www.aia-aerospace.org.8 Available from International Organization for Standardization (ISO), ISOCentral Secretariat, BIBC II, Chemin de Blandonnet 8, CP 401, 1214 Vernier,Geneva, Switzerland, http://www.iso.org.9 Available from ASTM International Headquarters. Order Adjunct No.RRE039002.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
