CSB and Wacker determined that the fatal HCL release was due to improper TORQUING on nozzle assemble
PTFE-lined piping, such as the equipment installed in the HCl regeneration unit, requires a retorquing of flange bolts to minimize leakage from bolt relaxation. The retorquing involves bringing the processing unit to operating temperature, allowing it to cool to ambient temperatures, and retorquing to the set value. As the original equipment manufacturer (OEM) describes: A […]
