Process Safety

Keeping hazards inside the pipes. How chemical engineers prevent disasters: HAZOP studies, quantitative risk analysis and LOPA, fire hazards and flammability, explosions and blast effects, and the handling of toxic and hazardous materials — with the consequence models used in real safety studies.

• HAZOP — HAZOP (Hazard and Operability study) is a structured team review that finds what can go wrong in a process design. Learn nodes, parameters and guidewords, how to record causes, consequences and safeguards, risk ranking with a risk matrix, and how HAZOP fits in the safety lifecycle.
• Risk Analysis — Risk = frequency × consequence. Learn qualitative vs quantitative risk assessment, fault trees and event trees, Layer of Protection Analysis (LOPA), probability of failure on demand (PFD), Safety Integrity Levels (SIL), individual and societal risk, and ALARP.
• Fire Safety — Fires are the most common major process accident. Learn the fire triangle, flash point and autoignition, flammability limits (LFL/UFL) and Le Chatelier's rule, fire types (pool, jet, flash fire, fireball), radiation hazards and safe distances, and fire prevention and protection systems.
• Explosion Safety — Explosions release energy fast enough to create damaging pressure waves. Learn deflagration vs detonation, vapour cloud explosions (TNT equivalency, scaled distance, overpressure effects), dust explosions (K_st and the dust pentagon), inerting and limiting oxygen concentration, venting and suppression.
• Hazardous Materials — Handling toxic, corrosive and reactive chemicals safely. Learn GHS classification and SDS, exposure limits (TLV, IDLH, AEGL), toxicology basics, dilution ventilation, Gaussian plume dispersion of toxic releases, reactive chemical hazards, storage and transport.