The following data should be confirmed to find the root cause.
1. Base Metal
- PMI
- Hardness
2. Welding
- WPS per API Technical Report 938-C, Appendix B
- Welding processes
- Heat input (minimum and maximum)
- What filler metal (including chemical composition) and nitrogen content
- Shielding gas composition including hydrogen and oxygen
- Backing gas composition (including hydrogen and oxygen) and applied method
- Root gap
- Preheat and interpass temperature
- Phase balance at welds per ASTM E562
- Impact test if required.
3. Corrosion (Ferric Chloride Pitting) Test
- the test procedure, solution, test temperature, and others
If you have some confidential information, you may be able to use my email (thomaseun at hanmail.net).
1. Base Metal
- PMI
- Hardness
2. Welding
- WPS per API Technical Report 938-C, Appendix B
- Welding processes
- Heat input (minimum and maximum)
- What filler metal (including chemical composition) and nitrogen content
- Shielding gas composition including hydrogen and oxygen
- Backing gas composition (including hydrogen and oxygen) and applied method
- Root gap
- Preheat and interpass temperature
- Phase balance at welds per ASTM E562
- Impact test if required.
3. Corrosion (Ferric Chloride Pitting) Test
- the test procedure, solution, test temperature, and others
If you have some confidential information, you may be able to use my email (thomaseun at hanmail.net).