Summarizing the ship fires in recent years, the areas where fires frequently occur on ships are mainly divided into four categories: machinery compartments, supply compartments, living compartments and deck storage compartments. Fires in these four areas have their own different characteristics. Diesel engine repair

(1) Mechanical cabin

The mechanical cabin mainly includes the engine room, gear box cabin, auxiliary engine room, repair cabin and other cabins with equipment. Fires in these cabins account for a large proportion of ship fires, mainly because the high-temperature heat source is close to the flammable liquid. The main heat sources are overheated equipment, equipment wires, and high-temperature cutting and welding used to repair equipment. Fuel mainly includes engine oil, lubricating oil, oil and gas, high-pressure fuel oil and clean solvent. Fires are mainly caused by equipment damage, storage container damage or sudden overflow, which causes the fuel to come into contact with high-temperature heat sources.

(2) Supply cabin

Supply cabins mainly include canteens, laundry rooms and kitchens and other areas with the same characteristics. These cabins have a large amount of solid fuel and a small part of liquid fuel. Except for the kitchen, the heat sources in other areas are mainly electrical equipment and smoke. Personal supplies, the kitchen is mainly the heat source used for cooking. The fuel is mainly furniture and clothing.

(3) Accommodation cabins

The combustibles that account for a large proportion in these areas are bedding, of course, but also some other combustible sundries such as clothing. The high-temperature heat sources are mainly traditional unextinguished cigarettes and overheated electrical equipment. Another important reason for fires in these areas is that some items were heated to emit some flammable gases or substances at the beginning of the fire, which led to the rapid expansion of the fire.

(4) Deck storage compartment

The fuel source in this area is mainly paint and detergent. When painting or cleaning, these flammable liquids will ignite when they come into contact with fumes or overheated electrical equipment. Another potential fire hazard is that when the aircraft is refueling, fuel spills and causes a fire.

The fires in the supply cabins and living cabins have basically the same characteristics as the conventional fires in land buildings. There are two main fire phenomena in the machinery cabins and deck storage cabins, oil pool fire and jet fire. These two fire phenomena are not only unique to ship fires, but are also dangerous and harmful in ship fires.

Jet fire mainly occurs when fuel is injected from a ruptured high-pressure pipeline and is ignited by a high-temperature heat source. Oil pool fire is mainly caused by fuel leaking from a pipeline or equipment and overflowing onto the deck. After reaching a certain area, it is ignited by a high-temperature heat source. Because there are many kinds of lubricating oil and fuel delivery pipelines with certain pressure in the mechanical compartment, when these pipelines are damaged and the fuel is sprayed, if it immediately touches the heat source, it will be ignited and form a jet fire. If it does not immediately touch the high temperature heat source, it will overflow. After flowing to a certain area on the deck, it is ignited by a high-temperature heat source to form an oil pool fire, and it is also possible that two types of fire, an oil pool fire and a jet fire, occur simultaneously. Since there is no high-pressure oil pipe in the deck storage compartment, the risk of oil pool fire is relatively high.