Calibrating Calculation on the Anti External Pressure of the Dehydrating Tower of Furfural-clay Unit

Based on standard of GB150-1998 "Steel Pressure Vessel", the calibrating calculation on the anti external pressure of the dehydrating tower of furfural-clay unit of Liaohe Petrochemical Company had been carried out, and the critical negative pressure value of the tower and some suggestions were put forward in this paper, too.