SURFACE COLD LAP

DEFECT WELD

(VISUAL)

SURFACE COLD LAP

SURFACE COLD LAP

Because
1. Temperature metal low.
2. Capping ampère low.
3. Swing not fixed.
4. The surface of the material dirty.

Result
1. Is incomplete fusion Potentially crack.
2. Arising suspicion that all lane welds been implemented ampère low so as to lead to fusion between elementary substance with the welds or inter lane imperfect.

Countermeasures :
1. If suspicion not proved , then cold laps sufficient in grindstone with the uniform.
2. If suspicion proven and all the troubled demolished ,repair welding as WPS repair .
3. If it is still troubled,Change welder.

Rejection criteria :
The existence of surface cold laps were rejected and must be repaired.

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