重催装置内取热器换热管破裂分析

Rupture Analysis of Interchange Tube of Interior Heat Collector for Heavy Oil Catalysis Cracking Plant

论述了内取热器Cr5Mo换热管破裂性质、原因及防止措施 ,指出采用高镍焊材异质接头 ,管内局部区域存在较厚覆盖物。

Character,cause and provision of the interchange tube rupture for interior heat collector were introduced. The analysis showed that making high nickel dissimilar filler metal joint , more heavy deposition as well as NaOH condensation on local zone in the tube, more high stress level were main cause for above Intergranular rupture.