Bryan Haywood

Consider Human Error and Domino Effects (EPSC Learning Sheet July 2025)

At an Ethylene unit in the Czech Republic (2015), when swapping over cooling water supply lines during a flowmeter calibration, the operator made a simple mistake. While intending to open valve #3 on the spare supply line, he closed the identical valve #2 instead, shutting off all cooling water to the Light Ends columns. A

IDLH Value Profile: Hydrogen Bromide CAS® No. 10035-10-6

This technical report presents the scientific basis, toxicologic data, and risk assessment meth­odology used to derive a health-based immediately dangerous to life or health (IDLH) value for hydrogen bromide (CAS No. 10035-10-6). The IDLH values are based on the scientific rationale and logic outlined in Current Intelligence Bulletin (CIB) 66: Derivation of Immediately Dangerous to

OSHA renews NEP to address amputations in manufacturing

OSHA has renewed its National Emphasis Program on Amputations in Manufacturing Industries, focused on preventing amputations in manufacturing workplaces. Under the renewed program, which aims to identify and mitigate hazards that could lead to amputations and other injuries in the manufacturing sector, OSHA will conduct inspections of manufacturing facilities to ensure compliance with safety practices

PSV inlet pipe failure (6# NH3 release inside Machinery Room)

A piping fitting failed, resulting in the release of approximately 5 pounds of ammonia (NH3) in the machinery room. The nipple (fitting) between the oil separator and its relief valve cracked and failed to hold ammonia in the piping, resulting in the activation of the exhaust ventilation system. Fittings made of certain materials are incompatible

Another “Torque Matters” event (16-pound NH3 Release from Oil Separator)

In an ammonia refrigeration system, ammonia in a gas state is compressed from the compressor to high-pressure, high-temperature ammonia gas. The compressed gas heats as its pressurised. The hot gas enters an oil separator, where the ammonia gas and compressor oil is separated so that oil is not carried over with the ammonia gas to

Scroll to Top