UT Acceptance Criteria for Corrosion Resistant Weld Overlay
UT Acceptance Criteria for Corrosion Resistant Weld Overlay
(OP)
I would like to find acceptance criteria for a ASME VIII vessel that has been overlaid with corrosion resistant material. We are debating the acceptance criteria on disbonding, any ideas?





RE: UT Acceptance Criteria for Corrosion Resistant Weld Overlay
RE: UT Acceptance Criteria for Corrosion Resistant Weld Overlay
Such a qualified panel may then be used as reference.
http://www.welding-advisers.com/
RE: UT Acceptance Criteria for Corrosion Resistant Weld Overlay
Qualification of the corrosion resistant weld overlay (CRO) procedure is required in accordance with ASME Section IX, Table QW-453. The issue I believe is actual examination in production. In this case you have several important variables - CRO thickness, chemical composition to assure no effect from dilution and bond integrity. This should have been listed in the contract documents or engineering specification prior to fabrication.
Regarding acceptance criteria for bond integrity, you can develop a grid system and scan using an L-wave to determine % bond within a designed area. On first go around I would insist on greater than 98% bond integrity with isolated areas containing lack of bond limited to a certain size (not to exceed). Regions containing lack of bond that are spaced below a minimum distance are unacceptable.
RE: UT Acceptance Criteria for Corrosion Resistant Weld Overlay
Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/