Hi all,
General questions around repairs of caustic stress corrosion cracking in carbon steel storage tanks that have not been PWHT and see high-med strength cleaning caustic at approx 90 deg C.
For context, fairly substantial CSCC is already present along most HAZ zones (transverse cracking) and along welds of fillet welded internal attachments. All repairs are short term temporary solutions at this stage as it is no longer economical to PWHT any repairs.
Does anyone have experience for:
1. Any slightly greater success with repairs holding up using low strength GP electrodes as opposed to low hydrogen electrodes? Would any electrodes perform slightly better in areas where CSCC is already present?
2. Experience with using multi-pass small runs vs large single pass beads for grinded out weld repairs in HAZ areas affected by CSCC?
3. Experiences with using metal spraying or coatings in these high temp/strength caustic environments as temporary repairs?
Thanks
General questions around repairs of caustic stress corrosion cracking in carbon steel storage tanks that have not been PWHT and see high-med strength cleaning caustic at approx 90 deg C.
For context, fairly substantial CSCC is already present along most HAZ zones (transverse cracking) and along welds of fillet welded internal attachments. All repairs are short term temporary solutions at this stage as it is no longer economical to PWHT any repairs.
Does anyone have experience for:
1. Any slightly greater success with repairs holding up using low strength GP electrodes as opposed to low hydrogen electrodes? Would any electrodes perform slightly better in areas where CSCC is already present?
2. Experience with using multi-pass small runs vs large single pass beads for grinded out weld repairs in HAZ areas affected by CSCC?
3. Experiences with using metal spraying or coatings in these high temp/strength caustic environments as temporary repairs?
Thanks
