Handbook of Case Histories in Failure Analysis
High-Temperature Failure by Perforation of Incoloy 800H Pigtails in Reformer Furnaces
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Published:1992
Abstract
The curved parts of exit pigtails made of wrought Incoloy 800H tubing used in steam reforming furnaces failed by performance after a period of service shorter than that predicted by the designers. Examination of a set of tubes consisting of both curved (perforated) and straight parts revealed that the cracks initiated at the outer surface by a combined mechanism of creep and intergranular embrittlement. A smaller grain size resulting from cold bending fabrication procedures for the curved parts was responsible for accelerating the embrittlement. It was recommended that hot bending be used for fabrication of the curved parts. A...
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Member Sign InSergio N. Monteiro, High-Temperature Failure by Perforation of Incoloy 800H Pigtails in Reformer Furnaces, Handbook of Case Histories in Failure Analysis, Vol 1, Edited By Khlefa A. Esaklul, ASM International, 1992, p 354–357, https://doi.org/10.31399/asm.fach.v01.c9001108
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