| Feature | AWS WI-I 2015 | AWS WI-I 2020 | |---------|---------------|----------------| | NDT methods | Conventional RT/UT | Phased array UT, Digital RT added | | Steel classification | Basic API/ASTM | Includes TMCP and Q&T steels | | Visual inspection tools | Traditional gauges | CAM and laser-assisted tools | | Code tables | AWS D1.1:2015 | AWS D1.1:2020 references | | Safety section | Minor updates | Full subchapter on fume extraction & PPE |
If you compare the 2015 PDF (still widely circulated) to the official 2020 edition, the differences are substantial:
The 2020 edition consists of 10 major chapters covering the essential technical knowledge required for welding quality control: