The objective of this research is the assessment of high-low misalignment in light wall girth welds, providing a basis for uniformly acceptable high-low misalignment acceptance criteria. This project is in line with the goal of enabling better decision-making regarding repairing, replacing, or leaving such welds in place. The industry currently does not have the capability of assessing the integrity of light wall girth welds with high-low misalignment in a reliable and consistent manner. This project will provide such a consistent assessment practice.
Phases 1 and 2 of this research have been recently been completed with the report of results currently under review by the PRCI Project Team. In these phases, welds of medium to slightly-heavy wall thickness have been tested and analyzed. Preliminary recommendations on misalignment limits/requirements have being developed based on the Phase 1 and Phase 2 tests and analysis. However, the impact of weld high-low misalignment may be different for light wall welds. Therefore in Phase 3, being considered for the coming year, light wall welds will be tested and analyzed to determine if the preliminary recommendations from Phase 1 and Phase 2 would still be applicable under these conditions.