Sector·2 min read
LPG and LNG Filling and Storage Fire Safety
LPG and LNG filling/storage facilities hold the highest-consequence fire scenarios: large quantities of pressurised or refrigerated flammable gas. A gas leak can form a heavy (LPG) vapour cloud and ignite; an LPG tank exposed to fire can explode destructively as a BLEVE (boiling liquid expanding vapour explosion); LNG cryogenic cold creates additional hazard; cylinder filling and filling islands carry static and mechanical spark risk. This article covers the real fire risks in LPG/LNG facilities, the measures to take, and the recommended suppression systems (water spray/deluge cooling on tanks, gas detection + emergency shutdown, foam, monitors).
A-Pro Engineering
LPG and LNG filling/storage facilities hold the highest-consequence fire scenarios: large quantities of pressurised or refrigerated flammable gas. A gas leak forms a heavy vapour cloud, an LPG tank exposed to fire explodes destructively as a BLEVE, LNG cryogenic cold is an added hazard, and filling islands carry static/mechanical spark risk. This article covers the real risks, measures, and recommended suppression systems.
Risk: flammable gas + BLEVE
- LPG leak — heavier than air; pools near the ground as a vapour cloud, distant ignition,
- BLEVE — a fire-exposed tank ruptures; fireball + pressure wave,
- LNG cryogenic — cold damage + evaporating into a flammable cloud.
Risk: filling, services and spread
- Cylinder/tank filling islands — static and mechanical sparks,
- Pump/compressor/valve — leak and ignition points,
- Fire heats a neighbouring tank — cascading BLEVE risk.
Measure: leak prevention + early detection
- Flammable-gas detection + emergency shutdown (ESD) + flame detectors around the area,
- ATEX/Ex equipment + grounding — static/spark prevention,
- Tank spacing + fire walls + spill containment.
Measure: tank cooling + suppression
- Fixed water spray/deluge cooling (BLEVE prevention) on LPG spheres/tanks and LNG tanks,
- Yard-wide fire main + hydrants + fixed/mobile monitors,
- Foam for liquid/fuel fire; explosion prevention within process safety.
Recommended suppression and detection systems
| Area / equipment | Recommended system |
|---|---|
| LPG sphere/tank, LNG tank | Fixed water spray/deluge cooling (BLEVE prevention) |
| Around tank/filling yard | Flammable-gas detection + emergency shutdown (ESD) |
| Yard-wide | Fire main + hydrants + fixed/mobile monitors |
| Liquid/fuel fire, spill | Foam + containment |
| Filling island, pump | ATEX equipment + suitable suppression |
| Electrical, control room | Clean-agent gas |
We covered foam for fuel fires in our foam article and the tank-farm approach in our petroleum tank farm article.
Summary
LPG/LNG facility fire safety manages flammable gas and BLEVE risk: catching leaks with gas detection + emergency shutdown, cooling the tank with fixed water spray/deluge to prevent BLEVE, protecting the yard with fire main + monitors, and liquid fire with foam. All are based on NFPA 58/59A (+15/11/2001) + ATEX + BYKHY/LPG-LNG legislation. For a related risk see our petrochemical plant and chemical storage articles. At A-Pro Engineering we design water spray/deluge cooling, gas detection, foam, and monitor systems for LPG/LNG facilities in an integrated way; contact us for your project.
This content is for information purposes. Binding design must be done on a project basis based on gas type (LPG/LNG), tank volume, yard layout, and the actual conditions of the facility, together with NFPA 58/59A, NFPA 15/11/2001, ATEX legislation, LPG/LNG and TSE legislation, and the current edition of BYKHY. BLEVE and vapour-cloud explosion prevention must be addressed within specialist process safety.
© 2027 A-Pro Mühendislik. This is original technical content produced by A-Pro Engineering; all rights reserved. Copying, reproducing or republishing it in whole or in part without attribution and permission is prohibited.
Frequently asked questions
What is the biggest fire hazard in LPG/LNG facilities?+
The biggest hazard is the uncontrolled release and ignition of a large quantity of flammable gas. LPG is heavier than air; a leak forms a vapour cloud that pools near the ground and spreads, and can flash from a distant ignition source. The most destructive scenario is a BLEVE (boiling liquid expanding vapour explosion): the wall of an LPG tank exposed to fire heats up, internal pressure rises, and the tank suddenly ruptures, creating a giant fireball and pressure wave. LNG is stored at cryogenic (very low) temperature; a spill carries both cold-damage risk and the risk of evaporating into a flammable cloud. Protection therefore focuses on catching leaks early and preventing BLEVE by cooling the tank against fire.
How is BLEVE prevented and why is the tank cooled?+
The key to preventing BLEVE is keeping the wall of a fire-exposed tank cool. Therefore a fixed water spray/deluge cooling system is installed on LPG spheres and tanks; when a nearby fire is detected, a continuous water film is sprayed onto the tank surface to prevent the metal wall overheating and pressure rising. Pressure relief valves release internal pressure in a controlled way, but the primary protection is cooling the wall. Adequate spacing between tanks, fire walls, and locating tanks away from fire limit spread. In a leak, automatic emergency shutdown (ESD) and isolation cut the feed and stop the fire before it grows. Water-supply capacity is the backbone of this scenario.
Why are gas detection and emergency shutdown critical?+
In LPG/LNG facilities, the first line of defence is catching a leak before ignition. Flammable-gas detectors are placed around filling islands, pumps, compressors, and tanks; when the set threshold is exceeded, automatic alarm, ventilation, and emergency shutdown (ESD) activate, flow is cut, and ignition sources are isolated. Flame detectors quickly catch open-area fires. All electrical equipment is selected per explosive-atmosphere (ATEX/Ex) classification, and static discharge is prevented by grounding. Early gas detection provides the chance to respond before the vapour cloud reaches a dangerous size; that is why detection and automatic shutdown are the safety backbone of the facility.
What measures are taken in an LPG/LNG filling/storage facility?+
The basic measures are leak prevention, early detection, and tank cooling. Flammable-gas detection + emergency shutdown (ESD) is installed around tanks/spheres; fixed water spray/deluge cooling is provided on tanks. Tank spacing, fire walls, spill containment, and drainage are planned. Filling islands and pump stations are protected with ATEX-compliant equipment, grounding, and suitable suppression. A fire main, hydrants, and fixed/mobile monitors are installed yard-wide; foam is provided for liquid/fuel fires. For LNG, cryogenic safety and spill management are added. Explosion (BLEVE/vapour cloud) prevention is addressed separately under process safety. A trained response team and an emergency plan are critical.
Which suppression systems are recommended in an LPG/LNG facility?+
By area: fixed water spray/deluge cooling for LPG spheres/tanks and LNG tanks (BLEVE prevention); flammable-gas detection + emergency shutdown (ESD) around tanks and the filling yard; fire main + hydrants + fixed/mobile monitors yard-wide; foam + containment for liquid/fuel fire and spills; ATEX equipment + suitable suppression for filling islands/pumps; clean-agent gas for electrical and control rooms. In a gas fire, the basic principle is to cut the leak first and cool the tank; extinguishing an uncontrolled gas fire can create a new vapour-cloud risk. The right set is designed per gas type (LPG/LNG), tank volume, and yard layout together with process safety.
Which rules govern LPG/LNG facilities?+
NFPA 58 (Liquefied Petroleum Gas Code) for LPG and NFPA 59A (LNG production/storage/handling) for LNG are the key references; water spray/deluge cooling is designed to NFPA 15, foam to NFPA 11, and clean-agent gas to NFPA 2001. Flammable-gas detection, emergency shutdown, and explosive atmospheres are based on ATEX/Ex classification and relevant process-safety approaches. In Türkiye, design is based on BYKHY and LPG/LNG and TSE legislation together with these standards. BLEVE and vapour-cloud explosion prevention are within specialist process safety. For related topics see our petroleum tank farm and petrochemical articles.
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