DISSIMILAR PIPING JOINT AT HIGH TEMPERATURE, HIGH PRESSURE TRANSIENT AND UNDER CYCLIC LOADING

摘要

A dissimilar piping joint arrangement (28) is described, comprising a first pipe section (30) and a second pipe section (31) and a dissimilar piping joint between the first pipe section and the second pipe section, the first and second consecutive pipe sections (30, 31) being made of first and second metallic materials (M5, M6) respectively with different material behavior and properties. An improved lifetime and extended applicability is achieved in that said dissimilar piping joint (28) is a coupling joint (F1, F2), said first pipe section (30) made of said first metallic material (M5) is provided at one end with a first coupling (F1) made of said first metallic material (M5), said second pipe section (31) made of said second metallic material (M6) is provided at one end with a second coupling (F2) made of said second metallic material (M6), and the first coupling (F1) and the second coupling (F2) are bolted together, whereby a first seal is established by direct metallic contact between the front faces of the first coupling (F1) and the second coupling (F2).