Scavenge Fire

Fire in the scavenge air space of a two-stroke crosshead engine, ignited by leaking fuel + carbon deposits + scavenge air.

In practice

Detected by the oil-mist detector and rising scavenge-receiver temperature. The OOW reduces engine load to dead slow, isolates affected cylinder, and starts cylinder-oil flush. Late detection causes piston-rod corrosion and crankcase contamination.

Regulatory detail & full definition

Symptoms: rising scavenge-air temperature on one cylinder, surging exhaust temperature, possibly reduced engine speed. Procedure: slow down, stop fuel to the affected cylinder, open scavenge fire-extinguishing connection (steam smothering), monitor temperature. Major fires can warp the cylinder liner. Prevented by good piston-ring seating and routine scavenge-space inspection.

Main Engine
Two-Stroke Engine

Source: Industry usage; MAN B&W Operating Manual safety guidance

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Scavenge Fire

In practice

Related

Scavenge Fire

In practice

Related