Sector·2 min read
Shipyard and Ship Fire Safety
Shipyards and ships bring together hot work (welding, cutting, grinding) — the most frequent cause of fire — with dense fuel, oil, and paint in enclosed, limited-access volumes: a welding spark can jump to fuel, paint, or insulation in the adjacent compartment; enclosed volumes such as tanks and holds both accumulate explosive vapor and hamper evacuation and response; machinery spaces are the most critical zone due to high-pressure fuel/oil; and many crews working different jobs at once multiply the risk. This article covers shipyard/ship fire risks, the measures to take, and the recommended suppression systems (hot-work permit system, CO2/water mist in machinery spaces, foam for fuel, fixed fire main and monitors).
A-Pro Engineering
Shipyards and ships bring together hot work (welding, cutting, grinding) — the most frequent cause of fire — with dense fuel, oil, and paint in enclosed, limited-access volumes: a welding spark can jump to fuel/paint in the adjacent compartment, tanks and holds accumulate explosive vapor, machinery spaces are the most critical zone due to high-pressure fuel/oil, and simultaneous multi-trade work multiplies the risk. This article covers the real risks, measures, and recommended suppression systems.
Risk: hot work + simultaneous trades
- Welding/cutting/grinding — continuous sparks, slag, hot surfaces,
- Sparks jump to fuel/paint/insulation in the adjacent compartment,
- Many crews on different decks at once — risk multiplies.
Risk: confined space and machinery space
- Tank/hold — explosive vapor + single exit + filling smoke,
- Machinery space — high-pressure fuel/oil, hot surfaces (most critical),
- Cable route — hidden, fast spread path.
Measure: hot-work and confined-space management
- Hot-work permit system + fire watch + clearing the surroundings,
- Confined-space gas measurement (gas-free) + ventilation + entry procedure,
- Fuel/paint stores as separate, ventilated + containment.
Measure: fixed systems and compartmentation
- CO2 total flooding or water mist + foam in machinery spaces,
- Fixed fire main + hydrants + monitors on the ship,
- Linear heat detection + barriers on cable routes; fire doors/compartmentation.
Recommended suppression and detection systems
| Area / equipment | Recommended system |
|---|---|
| Machinery space | CO2 total flooding / water mist + foam |
| Fuel/oil store, pump station | Foam + containment |
| General ship/shipyard area | Fixed fire main + hydrants + monitors |
| Paint shop, solvent area | Foam / suitable suppression |
| Cable route | Linear heat detection + barriers |
| Electrical, control/bridge | Clean-agent gas |
We covered cable routes in our cable gallery article and foam in our foam article.
Summary
Shipyard/ship fire safety starts with hot-work management: a permit system + fire watch + confined-space gas measurement; protecting machinery spaces with CO2/water mist + foam, fuel/paint with foam + containment, cables with linear heat detection + barriers, and keeping a fixed fire main + monitors on the ship. All are based on SOLAS/IMO FSS Code + NFPA 12/750/11/307 + BYKHY (land facility). For a related risk see our petroleum tank farm and factory/industrial facility articles. At A-Pro Engineering we design water mist/CO2, foam, fire main, and clean-agent suppression for shipyard and ship projects 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 ship type, compartment layout, process flow, and the actual conditions of the facility, together with SOLAS/IMO FSS Code, classification-society rules, NFPA 12/750/11/307, and the current edition of BYKHY.
© 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 most frequent cause of fire in shipyards and ships?+
The most frequent cause is hot work: welding, cutting, grinding, and heating continuously produce sparks, slag, and hot surfaces. In a shipyard environment, these sparks can jump to fuel, oil, paint, solvent, or insulation in the adjacent compartment and start a fire; hot metal can ignite hidden combustible material behind a bulkhead or deck. In addition, because many crews work on different decks at once, hot work at one point can endanger preparation work at another. That is why a hot-work permit system, fire watch, and gas/cleanliness control of the surroundings are the backbone of shipyard safety.
Why are confined spaces (tanks, holds) so dangerous?+
Tanks, holds, and double-hull voids on ships are enclosed, narrow, single-exit volumes. Fuel or paint residue accumulates explosive vapor in these volumes; a spark can cause both fire and explosion. Smoke from a fire in an enclosed volume fills fast, makes vision and escape impossible, and poses a lethal risk to those inside. Protection requires gas measurement before work (gas-free certificate), forced ventilation, a confined-space entry procedure, a rescue plan, and portable suppression equipment. Cleaning and de-vaporizing the volume before hot work is essential.
How are machinery spaces and fuel systems protected?+
Machinery spaces are the ship's most critical fire zone due to high-pressure fuel and oil lines, hot engine surfaces, and turbines; if a fuel leak reaches a hot surface, a fast, severe fire results. These volumes are protected with a fixed suppression system: traditionally CO2 total flooding, and today water mist and foam systems are preferred; water mist both cools and suppresses vapor and is safer in occupied environments. Fuel lines have quick-closing valves, drip trays, and pump shutdown. In addition, general alarm, fire doors, and compartmentation limit spread.
What measures are taken in a shipyard/ship?+
The basic measure is hot-work management: a permit system, fire watch, removal of nearby combustibles, and having extinguishers ready. In confined spaces, gas measurement, ventilation, and an entry procedure are applied. Fuel/oil and paint stores are designed as separate, ventilated, with containment. Cable routes are divided with fire barriers and electrical equipment is selected in the right class. The ship has a fixed fire main, hydrants, and monitors, with fixed suppression in machinery spaces. During construction/repair, a temporary fire main, detection, and evacuation plan are kept up to date; a trained response team across the shipyard is critical.
Which suppression systems are recommended in a shipyard/ship?+
By area: CO2 total flooding or water mist + foam for fuel in machinery spaces; foam + containment for fuel/oil stores and pump stations; a fixed fire main, hydrants, and monitors (fixed/portable) for general ship and shipyard areas; foam/suitable suppression for paint shops and solvent areas; linear heat detection + barriers for cable routes; clean-agent gas for electrical and control/bridge areas. On ships under construction, a temporary fire main and portable equipment come to the fore. The right set is designed per ship type, compartment layout, and process flow together with classification-society requirements.
Which rules govern shipyards/ships?+
Ship fire safety is based primarily on SOLAS (International Convention for the Safety of Life at Sea) and the IMO FSS Code (Fire Safety Systems) together with classification-society rules; these set compartmentation, fixed suppression, detection, and evacuation requirements. In suppression system design, standards such as NFPA 12 for CO2, NFPA 750 for water mist, NFPA 11 for foam, and NFPA 307 (marine terminals) for the general approach are referenced. For shipyard land facilities, NFPA 13/EN 12845 and BYKHY apply. In Türkiye, design is based on these rules together with maritime legislation and BYKHY. For related topics see our petroleum tank farm and cable gallery articles.
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