AWS D1.1 2020 - summary of changes

Changes to AWS D1.1-2020

Published on a five-year revision cycle, AWS D1.1:2020 revises AWS D1.1:2015. As the twenty-fourth edition of the code, this document underwent the following changes:

  • Normative references, which were previously found in sublause 1.9 and Annex S, were placed in new Clause 2.
  • Terms and definitions, which were previously found in subclause 1.3 and Annex J, were placed in their own Clause 4.
  • Clause 5, “Prequalification of WPSs,” underwent restructuring to follow the normal progression of writing a prequalifed WPS.
  • Table 5.2, “Essential Variables for Prequalifed WPSs,” was renamed reorganized to list WPS essential variables.
  • New table 5.7, “Prequalifed WPS Shielding Gas Options for GMAW electrodes conforming to AWS A5.18/A5.18M,” was added, and additional requirements were added to the AWS D1.1 document when using shielding gases.
  • New materials were added to table 5.3, “Approved Base Metals for Prequalifed WPSs,” and table 5.8, “Prequalifed Minimum Preheat and Interpass Temperature”
  • The requirements for the qualification of WPSs using waveform technology were revised.
  • All Charpy V-notch (CVN) testing requirements were contained to Table 6.7, “PQR Supplementary
  • Essential Variable Changes for CVN Testing Applications Requiring WPS Requali cation for SMAW, SAW, GMAW, FCAW, GTAW, and ESW/ EGW.”
  • WPS retest requirements were clarifed.
  • The partial joint penetration (PJP) groove weld clause was reorganized to clarify the qualification of PJP groove welds using the joint details in Figure 5.2, “Prequalified PJP Groove Welded Joint Details.”
  • Part D of clause 6, which covers “Requirements for CVN Toughness Testing,” was reorganized to better align testing procedures and quali cation of CVNs with the order in which they would be accomplished.
  • The weld restoration of base metal with mislocated holes was revised in clause 7, “Fabrication.”
  • Changes made to the qualification requirements for inspection personnel help to ensure that all welding inspectors are qualifed.
  • Clarifcations were added for the engineer’s responsibilities for inspection.
  • Digital radiography was added to radiographic testing.
  • The limitations for geometric unsharpness were added to the code, and the equation for this was revised to match the equation in ASME Boiler and Pressure Vessel Code, Section V, Article 2.
  • The methodology for determining the attenuation factor was updated to reflect that ultrasonic testing (UT) instruments are now capable of reporting a fractional value for dB.
  • The code now requires the manufacturer’s permanent idenfication on headed studs and deformed anchor bars.
  • The code now provides weld procedure requirements for llet welding of studs.
  • The calculations for static strength of welded tubular connections were removed in deference to American Institute of Steel Construction (AISC) design provisions.
  • New Normative Annex H Was added for phased array ultrasonic testing (PAUT), along with commentary for this annex.
  • Informative Annex R, “Ovalizing Parameter Alpha,” contains modifications to contain preliminary design of circular tube connections. Some of this information was previously contained in the tubular structures clause of the document.


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