Performance Defects and Improvement of Threaded Locking Ring Heat Exchanger

The imported H-H threaded locking ring heat exchangers used in the hydrotreating plants were found to have design defects during equipment overhaul.The outer main bolts,interior flange bolts and locking thread were damaged to some extents resulting in difficult removal and leakage.Improved bolt feature and removal program had adopted in solving the problems and favourably operation achieved.