IACS Unified Requirement W4 - Post-weld heat treatment. Covered by all member class societies.
Formula
$$ \text{IACS UR W4} \Rightarrow \text{Welding} $$Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $W4$ | Post-weld heat treatment | - | IACS website |
Sources
- IACS UR W4.