THE FALURE ANALYSIS OF INLET GAS TUBE IN X10CrNiTi189 STEEL HPS DESUPERHEATING DRUM
X10CrNiTi189钢高压蒸汽降温罐进气管断裂分析

The failure of the inlet gas tube was investigated by using optical microscope. SEM and Cl - detection test. The results show that the failure of the tube is due to stress corrosion crack propagation. In the environment of high temperature high preesure and the liquid medium condensed by high pure water steam in this work, the failure of the tube is mainly related to the stress, the solved oxygen content in the condensed liquid and sensitivity degree of the tube material. According to the experiment results, means to prevent the tube failure have been suggested.