Repair plan for propylene oxidation reactor or relevant experience from construction units (heat transfer medium: molten salt)

Thread Content

Hello, everyone! Our company has an acrylic oxidation reactor, with molten salt as the heat exchange medium. Initial inspections showed that leaks in over 20 tube bundles had been repaired, and the hydrostatic test passed. However, during the hot salt leak test, traces of salt leakage were found at 11 locations on the lower tube sheet. Due to the high permeability of the molten salt, each leak site involves dozens or even hundreds of tube bundles. After cleaning the surface of the lower tube sheet and performing penetrant testing, no defects were detected; therefore, it is impossible to pinpoint the exact location of the leak, and repairs cannot be carried out. I’m asking the experts here for solutions! ! ! ! ! ! Also, if any construction companies have experience in repairing micro-leaks in molten salt, please feel free to introduce them. Thank you! ! ! ! !