ASME code classification of pipe stresses: A simplified elastic procedure

Abstract

Liquid Metal Fast Breeder Reactor (LMFBR) plants utilize thin-walled components to minimize thermal stresses due to coolant temperature transients. A non-integral, insulated pipe clamp is generally used to support high temperature pipes and minimize thermal interaction between the piping and the support system. The resultant clamp-induced pipe stresses require consistent classification into primary and secondary stress categories as defined by the ASME Code. A simplified stress classification procedure is proposed in this paper to split the clamp-induced pipe stresses into primary and secondary categories.