ROOT POROSITY

DEFECT WELD NON VISUAL ROOT POROSITY Root Porosity Because : 1. The condition of the root damp or moist. 2. Electrode moist 3. Purging gas contaminated ( GTAW ) 4. No purging gas ( GTAW ) Result : 1. Weaken Connection weld. 2. Started erosion abrasion. 3. Started INTERNAL CORROSION. Countermeasures : 1. Gouging until roots...

READMORE

INCOMPLETE PENETRATION (IP)

DEFECT WELD NON VISUAL INCOMPLETE PENETRATION INCOMPLETE PENETRATION Because : 1. GAP too narrow 2. Ampere root low 3. Welding machine not Calibration 4. The electrodes up and down 5. GAP dirty Result : 1. Notch potential crack. 2. weaken weld joint. 3. Started erosion abrasion. Countermeasures : 1. Gouging until roots in...

READMORE

EXCESS WIRE

DEFECT WELD  NON VISUAL  EXCESS WIRE  EXCESS WIRE  Because : 1. WELDING WIRE COROTION 2. WIRE FEEDER NOT NORMAL . 3. Electricity supply disconnected breaking up Result : 1. NOTCH POTENTIAL CRACK. 2. DAMAGE CLEANING PIG Countermeasures : 1. Gouging until roots in the location of a defect in the welds...

READMORE