DEFECT WELD
(VISUAL)
POROSITY
Defect Weld : Porosity
1. Environmental wet or moist.
2. The galvaniize not yet been grinding .
3. Elektoda moist.
4. A rising gas when welding prosses.
5. Ampere capping too high .
6. The wind getting into the area welds.
7. Welding-joint dirty.
2. The galvaniize not yet been grinding .
3. Elektoda moist.
4. A rising gas when welding prosses.
5. Ampere capping too high .
6. The wind getting into the area welds.
7. Welding-joint dirty.
Result
1. Bad Profile.
2. Weaken weld joint.
3. Started rust the surface.
Countermeasures :
Grinding or gouging to defect missing, Welds repeated according WPS repair
Rejection criteria :
1. Individually to exceed 1/8” or 25% nominal thickness.
2. For cluster porosity Diameter more than ½”.
3. The number of long clusters in 12” weld more than ½”.
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