Chemical Process Safety (PSM/RMP)

OSHA’s General Duty Clause and RV’s “discharging to a safe location”

Anyone who has worked with ASME/API pressure vessel codes knows the basic language used to describe Relief Valve (RV) discharge locations… “discharge to a safe location”.  This requirement applies to ALL relief devices on all types of equipment and although OSHA does not have a specific standard on relief devices and their design, they will use […]

Ammonia release leads to flashfire and destruction of electrical inside conduit

I read a lot of OSHA case files and sometimes I find the narrative very interesting.  This one, I found to be darn near impossible to have occurred as written… At approximately 2:30 p.m. Employee #1’s coworker, a refrigeration technician, was troubleshooting a compressor shutdown and opened a valve which vented anhydrous ammonia into Engine Room #3.

Process/Line Opening gone bad

At 7:15 a.m. on May 10, 2017, vapor phase anhydrous ammonia was released in an uncontrolled manner from a high-pressure line. The release took place when an employee drilled a 5/32-inch diameter pilot hole into a 3-inch schedule 40 seamless steel pipe containing anhydrous ammonia. The pilot hole was drilled as a starter hole for

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