Chemical Process Safety (PSM/RMP)

FINAL REPORT on the Intercontinental Terminals Company (ITC) Tank Farm Fire

The Harris County Fire Marshal’s Office (Case Number 1903-00046) and The Bureau of Alcohol, Tobacco, Firearms and Explosives (Case Number 782035-19-0029) have issued their FINAL REPORT on the Intercontinental Terminals Company (ITC) Tank Farm Fire in La Porte on March 17, 2019.  It was observed what appeared to be studs laying in the pump housing. […]

Diaphragm failure is caused from overpressure due to trapped liquid ammonia

Incident overview In an industrial food processing facility, an ammonia leak occurred from the thermal expansion valve diaphragm, that required replacement. Site, system and components The thermal expansion valve and diaphragm control the rate of flow of liquid ammonia that feeds the spiral freezer. The freezing temperatures are obtained when liquid ammonia evaporates to vapor

Bonnet gasket leaking from chiller isolation valve to oil pot (10 pound release)

Incident overview The bonnet gasket on the isolation valve between the brine chiller and the oil pot leaked approximately 10 lbs ammonia into the mechanical room. Two (2) refrigeration technicians had completed draining oil from the oil pot and when the isolation valve was closed the bonnet gasket leaked ammonia into the brine chiller insulation.

Guidelines for Ammonia Refrigeration Plant Equipment Integrity Programs (TSBC Draft #2)

Following the release of the Fernie Incident Investigation Report Technical Safety BC developed new ammonia refrigeration industry maintenance guidelines to support facility owners and refrigeration professionals with implementing the report recommendations. The purpose of these guidelines is to provide ammonia refrigeration plant owners and operators with guidance and basic information about the development, documentation, and

Anhydrous Ammonia Tank Failure – South Africa 1973, Detailed report on a major disaster in a fertilizer plant

On July 13, 1973, at a fertilizer plant, one of four 50-ton (metric) pressure-storage tanks (horizontal bullet type) failed. The failure resulted from brittle fracture of a dished end. No specific source of cracking, or a “triggering incident” was identified. An estimated 30 ton of anhydrous ammonia was released, plus another 8 ton from a

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