Welding Positions Diagram -

| ASME Position | ISO Position | Description | |---------------|--------------|-------------| | 1G | PA | Flat groove | | 2G | PC | Horizontal groove | | 3G | PF (upward) or PG (downward) | Vertical groove | | 4G | PE | Overhead groove | | 1F | PA / PB | Flat fillet | | 2F | PB / PC | Horizontal fillet | | 3F | PF / PG | Vertical fillet | | 4F | PE | Overhead fillet |

A welding positions diagram typically illustrates these positions and is used as a reference guide for welders to ensure proper technique and quality. welding positions diagram

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