Industrial facilities face complex fire and explosion risks. This guide covers DSEAR compliance, ATEX zone classification, sprinkler design, and emergency planning for manufacturing environments.. Industrial Fire and Explosion Risk UK manufacturing and industrial facilities present some of the most complex fire safety challenges. The presence of flammable liquids, combustible dusts, pressurised systems, and high energy processes creates risks that extend beyond conventional building fire safety into process safety engineering. Regulatory Framework DSEAR (Dangerous Substances and Explosive Atmospheres Regulations 2002) Applies to : any workplace where dangerous substances are present Risk assessment : identify all dangerous substances and assess explosion risk Zone classification : classify areas based on likelihood of explosive atmosphere Control measures : eliminate, substitute, or control ignition sources Emergency arrangements : procedures for dealing with incidents ATEX Directives ATEX 137 (Workplace) — implemented via DSEAR in the UK ATEX 114 (Equipment) — equipment and protective systems for use in explosive atmospheres Zone classification : Zone 0, 1, 2 (gas) and Zone 20, 21, 22 (dust) Equipment categories : Category 1 (highest protection) to Category 3 Zone Classification Zone Gas/Vapour Dust Frequency Equipment Category 0 / 20 Continuously present Continuously present Permanent Cat 1 1 / 21 Likely in normal operation Likely in normal operation Frequent Cat 2 2 / 22 Not likely, brief if occurs Not likely, brief Infrequent Cat 3 Common Industrial Fire Risks Combustible Dust Explosions Wood dust — furniture manufacturing, sawmills Metal dust — aluminium, magnesium machining Food dust — flour, sugar, grain handling Pharmaceutical — fine powder processing Pentagon criterion : fuel + oxygen + ignition + dispersion + confinement = explosion Fire Protection Systems Sprinkler Design for Industrial Occupancies Ordinary Hazard Group 3 — general manufacturing High Hazard Process — paint spraying, flammable liquid handling High Hazard Storage — rack storage of combustible goods Design density : 5mm/min (OH3) to 30mm/min+ (HHP) Water supply : dedicated tank and pump, minimum 90 minute duration Explosion Suppression Chemical suppression — rapid acting suppressant deployed in milliseconds Explosion venting — controlled release of pressure through vent panels Explosion isolation — preventing propagation through ductwork and pipelines Spark detection — infrared sensors in pneumatic conveying systems Emergency Planning COMAH (Control of Major Accident Hazards) For facilities storing dangerous substances above threshold quantities: Notification — to HSE/Environment Agency MAPP — Major Accident Prevention Policy Safety report — demonstrating control of major accident hazards Emergency plan — on site and off site emergency plans Land use planning — consultation distances for new development Site Emergency Plan 1. Alarm system — distinct alarms for fire, explosion, toxic release, evacuation 2. Assembly areas — upwind of prevailing weather, away from hazardous storage 3. Mutual aid — agreements with neighbouring industrial sites 4. Fire service pre planning — site visits, familiarisation, tactical plans 5. Environmental protection — containing contaminated firewater and runoff Insurance and Loss Prevention FM Global — Factory Mutual data sheets for industrial fire protection LPCB — Loss Prevention Certification Board approved systems Highly Protected Risk (HPR) — achieving premium status through comprehensive protection Hot work procedures — mandatory for all industrial insurance policies Business continuity — alternative manufacturing capacity planning Supply chain — single source component risks and fire protection of critical processes Magnus Opifex SEVEN LTD — UK's Leading Fire Safety & Fire Engineering Consultancy 🌐 magnus opifex.co.uk 📞 +44 7486 691724 ✉️ office@magnus opifex.co.uk Founders: Nicoleta Vasile, Baroness of Brattleby — CEO, Lawyer and Barrister, Legal & Administrative Director Alina — Technical Director & Expert Fire Engineer (BEng) Head Office: Ealing Cross, 85 Uxbridge Road, London W5 5BW Magnus Opifex SEVEN LTD delivers engineering led fire engineering, fire risk assessments, CFD modelling, and building safety consultancy across the United Kingdom and internationally. With over 20 years of combined experience and a UK portfolio spanning healthcare, residential and infrastructure, we bring truly engineered solutions with a personal touch. © 2026 Magnus Opifex SEVEN LTD. All rights reserved.