Repair of Welding Joint Defects of HP40Nb and P11 Dissimilar Steel In-service
In this paper,the causes of weld defects in HP40Nb and transition section P11 of reformer furnace were analyzed.The welding process evaluation test was carried out before repair,and the bending test items in NB/T47014 were demonstrated.In addition,special process methods were adopted during welding repair to ensure that the weld was qualified once.Finally,it is suggested that the transition section P11 should be changed to TP321 in the design stage,which is more suitable for production use.
reformerfurnace tubeHP40NbP11crackingrepairwelding procedure qualification test
NETL
NSTL
万方数据
