Find the applicable weld acceptance requirement

Select the governing document

The AWS D1 catalogue lists D1.1/D1.1M:2025-AMD1. ISO 5817:2023 addresses quality levels B/C/D for its stated fusion-weld scope. A quality level is not a universal structural load approval, and these documents are not interchangeable.

Take the complete case to the relevant clause

Record material and thickness, joint type, weld symbol/dimensions, load category where applicable, quality level, inspection method and the exact imperfection being evaluated. Consult the matching clause/table in the required edition.

Leg and throat are not universal substitutes

For an ideal equal-leg 90° triangle, the geometric throat is leg / √2. Effective throat under a welding specification can depend on penetration, root and groove conditions; the simple triangle is not an acceptance calculation.

Continue your task

A boxed basic dimension gives a theoretical target →Prepare a traceable first article inspection record →Find the geometric control on your drawing →

All tolerance and surface references →

Sources and review scope

Reviewed 23 October 2026. Arithmetic examples are labelled separately from source-table facts and standard scope.

AWS D1 structural-welding committee

Published-document catalogue includes D1.1/D1.1M:2025-AMD1. Directory does not verify any numeric acceptance threshold.

Open the original source ↗

ISO 5817:2023

Public scope: fusion welds in steel, nickel, titanium and their alloys, excluding beam welding; quality levels B/C/D. Full defect tables not reproduced.