The New Design Approach to the Breech Lock Closure Type Heat Exchagers.

概要

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An explosion and subsequent fire took place at Fuji Oil Sodegaura Refinery on October 1992, resulting 10 deaths and 7 injured.The MITI's investigation report states that main cause of the accident is considered to be the thermal stresses generatd by the difference in thermal expansion between the internal parts (austenitic stainless steel) and the channel barrel (ferritic steel).In this paper, following three new design approaches are presented in order to reduce the thermal stress which might be generated by the thermal expansion difference between internal parts and channel barrel.(1) Application of the ferritic stainless steel to the internal parts which have a same amount of the coefficcient of thermal expansion to the channel barrel material.(2) Application of the spiral wound gasket that is capable to adsorb the thermal stress generated by the thermal expansion difference.(3) Application of the both ferritic stainless steel internal parts and spiral wound gasket under combination.
一般社団法人日本高圧力技術協会の論文