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qualitypro
Mechanical
- Sep 30, 2003
- 91
We encountered a weld failure between an ellipsoidal head and the tubesheet material in the field even before the equipment had been started up. The head in the new HX equipment was over 3 inch thick and had gone through all necessary preheat, NDE, PWHT, hydros etc in an overseas shop with no anomalies. What could be the potential causes for this failure? Appreciate if anybody can share any past experiences with HX weld failures.