Bulletin BEACON – April 2020

Bulletin BEACON – April 2020

A plant was restarting after a shutdown. The pulley of a double-lobe blower on a mist separator vent line (Figure 1) suddenly broke while rotating, explosively expelling fragments. Fortunately, the pulley guard (Figure 2) captured the fragments. If the guard had been...
Proccess safety BEACON – July 2020

Proccess safety BEACON – July 2020

An explosion on October 13, 2002, propelled large fragments of debris offsite, some landed near crude oil storage tanks. Three people were injured, but fortunately, no fatalities occurred. Steam leaking through manual block valves heated crude Mononitrotoluene (MNT)...
Proccess safety BEACON – June 2020

Proccess safety BEACON – June 2020

Can a “fail open” valve fail closed?. Clearly the answer is YES or we would not have asked the question! On piping and instrumentation diagrams (P&IDs) or other process safety information (PSI), valves may be indicated as “fail open,” “fail closed,” or “fail in...
Proccess safety BEACON – May 2020

Proccess safety BEACON – May 2020

On November 9, 2010, in upstate New York, USA, a contractor was welding new support brackets on a tank for water-based polymer slurry. The area outside the tank had been monitored for flammables and approved for hot work, but the inside of the tank was not tested. An...