Plastics plants of all types should re-check their safety procedures this weekend, following fatal accidents at three companies in the past week.

The accidents included a fire that killed three firefighters at a Rexam plc plant in Shanghai, a crane collapse that killed four at a LyondellBasell plant in Houston, and an accident at Global P.E.T. Inc. in Perris, Calif., that killed one worker.

The incidents obviously are not related, but managers responsible for safety should take a close look at the incidents and check their own workplaces for potential dangers.