Dear Experts,
-- Query:
1. Can it be possible to use DC power source, using ENiCrMo-6 electrode for base metal containing 5% Ni (5% Ni Steel for LNG tank-cryogenic application) crack welding?
2. Can it be possible to attend repair having following details:
Crack Length=500 mm linear throughout base material
Thickness=13.5 mm
Base Metal=5% Ni Steel
Electrode=ENiCrMo-6, AC power source
Application=LNG carrier (MDMT is around -105°C)
or else have to do patch up (renewal of plate) welding? If yes then suggest to avoid patch up with recommended repair procedure/standard.
Note: As per IACS (Ship Repair Standard) maximum allowable crack length is 500mm & depth=0.5t or else preferred for renewal of plate.
Thanks & Regards,
Maulik H. Thakkar
Welding Engieer
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