| Welding Inspector

EXCESSIVE REINFORCEMENT

DEFECT WELD

VISUAL

EXCESSIVE REINFORCEMENT

EXCESSIVE REINFORCEMENT

Because :
1. TEMP METAL LOW.
2. AMPER CAPPING LOW.
3. SPEED CAPPING LOW.
4. COLD ENVIROVMENT.

Result :
1. A rising suspicion that all the lanes of the welds ampère with low.
2. Perhaps conditions internal the welds good enough but needs to be investigated further.

Countermeasures :
1. NDT test using method RT or UT ( STRAIGHT ATAU ANGLE PROBE ). If the result is proving that suspicion , and all the problems in unloading and repair welding as WPS. Welder change to QUALIFIED.
2. If the result of the test ndt show the condition internal the welds good , so the prominent sufficient in burrs to uniform and in accordance standard.

Rejected Criteria
Rejected or accepted refrain to Conditional depends the test N.D.T. If all the lanes of welds with ampère low, the welds been rejected, and but if qualified the received on the condition protrusion on standard.

Noted :
The height REINFORCEMENT welding, MAXIMUM look HIGH LOW ( ANSI B 31.3 ) .

ROOT CRACKS

DEFECT WELD

NON VISUAL

ROOT CRACKS

ROOT CRACKS

Because :

1. NOTCH.
2. STRESS.
3. C equivalent < 0.41 %
4. STRESS RELIEF .
5. MARTENSIT DI H.A.Z.
6. CRYSTAL GROWTH.
7. FERRITE < 5% and > 12 % STAINLESS STEEL .
8. REHEAT CRACK .
9. STRESS CORROSION CRACKING ( S.C.C ) ,Cl2 , S, H2 , CAUSTIC.
10. SHRINKAGE.

Result

1. FATAL

Countermeasures :

1. Do it FAILURE ANALYSIS To determine the cause of crack accurately.
2. If crack are in the welds, GAOUGING . setting again and repair weld as WPS REPAIR.
3. If crack are out the welds , so all material(base metal) replace to a new.

Rejected Criteria

1. Cracked a star considered not dangerous unless if to exceed 5/32 “ length.
2. A kind of crack other all rejected.

CRACK

DEFECT WELD

VISUAL

CRACK

CRACK

Because :
1. NOTCH.
2. STRESS.
3. C equivalent < 0.41 %
4. STRESS RELIEF .
5. MARTENSIT DI H.A.Z.
6. CRYSTAL GROWTH.
7. FERRITE < 5% and > 12 % STAINLESS STEEL .
8. REHEAT CRACK .
9. STRESS CORROSION CRACKING ( S.C.C ) ,Cl2 , S, H2 , CAUSTIC.
10. SHRINKAGE.

Result
1. FATAL

Countermeasures :
1. Do it FAILURE ANALYSIS To determine the cause of crack accurately.
2. If crack are in the welds, GAOUGING . setting again and repair weld as WPS REPAIR.
3. If crack are out the welds , so all material(base metal) replace to a new.

Rejected Criteria
1. Cracked a star considered not dangerous unless if to exceed 5/32 “ length.
2. A kind of crack other all rejected.