Failure Analysis of a Service Tube
Zhongdong Xie, Weiguo Cai, Zhenxing Li, Y.Q. Wang W.H. Qian Z. Guan, Baocheng Zhang, XiaoTong Yang · IOP Conference Series Materials Science and Engineering · 2017
One tube was cracked used in the primary reformer furnace in a fertilizer plant for two and half years. In order to find out the causes of cracking, the methods for chemical composition analysis, macro- and microstructure analysis, penetrant testing, weld analysis, crack and surface damage analysis, mechanics property analysis, high temperature endurance performance analysis, stress and wall thickness calculation were adopted. The integrated assessment results showed that the carbon content of the tube was in the lower limit of the standard range; the tube effective wall thickness was too small; local overheating leads to tube cracking in use process.