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Home › Engine Room › Fire Pumps and Fixed Systems in the Engine Room
Operational guide · Safety & equipment

Fire Pumps and Fixed Systems in the Engine Room

The emergency fire pump is designed to work precisely when the main engine room is inaccessible: its maintenance therefore requires a discipline independent from that of the main machinery.

fire pumpsfire pumpSOLAS Chapter II-2fixed systems

Operational Explanation

The main fire pumps and the emergency fire pump form the basic water system for onboard firefighting. The emergency pump is specifically designed to remain operative even when the main engine room is inaccessible (e.g. due to fire in the engine room itself), which requires an independent location and power supply, as well as dedicated maintenance.

Fixed extinguishing systems in the engine room (CO2, foam, water sprinkler) complete the protection, but require specific periodic checks, distinct from routine machinery maintenance.

Regulatory Reference

SOLAS II-2/10 sets pump number, capacity, pressure and independence by ship type and size; FSS Code chapter 12 addresses the emergency fire pump. SOLAS II-2/14 links maintenance, testing and inspection to IMO guidance; MSC.1/Circ.1432, as amended, includes monthly operational tests and annual flow tests. Always apply the edition, scope, maintenance plan and ship-specific flag/class requirements.

SOLAS II-2/4.2.2 addresses remote closing for specified oil-fuel tanks and protection of hot surfaces. These controls share the fire scenario but retain their own method and frequency: do not derive the quick-closing-valve frequency from the emergency fire-pump frequency.

MSC.1/Circ.1432 distinguishes monthly pump operation to verify adequate pressure from annual flow/capacity testing; the latter includes testing the emergency pump with isolation valves closed. Identify the valves on the approved arrangement and follow the test procedure: do not indiscriminately close valves or cause a blackout to demonstrate independence. IMO MSC.1/Circ.1432, 5.1 and 7.1.

For CO₂, before intervention take precautions against accidental discharge, inform personnel and apply the prescribed compensating measures while protection is unavailable. Afterwards verify correct restoration of controls, connections and interlocks under the procedure. IMO MSC.1/Circ.1318/Rev.1.

Scope of Application

Every ship subject to SOLAS Chapter II-2, with specific requirements on the minimum number of fire pumps depending on ship type and size.

Procedure / How to Complete It

  1. Periodically test the main fire pumps, verifying pressure and flow at the most unfavourable hydrants.
  2. Separately test the emergency fire pump, verifying independent start-up and the ability to operate with the main engine room hypothetically inaccessible.
  3. Periodically verify fixed extinguishing systems (CO2, foam, sprinkler) according to manufacturer instructions and Class requirements.
  4. Record every test and maintenance activity, with particular attention to anomalies found on the emergency pump.
  5. Coordinate fire pump tests with periodic fire drills, to verify actual availability in a realistic operational scenario.

Practical Example

Example test: emergency fire pump started monthly independently from the main power supply, with pressure verified at the furthest deck hydrant, result recorded in the engine log book.

What Typically Goes Wrong

In several PSC inspections, the emergency fire pump was found non-functional or with insufficient pressure at the moment of the test requested by the inspector, despite being regularly recorded as 'tested' in the logs — an indication that the recorded test was not genuinely verifying the emergency conditions the pump is designed for (independent power supply, main engine room hypothetically inaccessible).

Common Mistakes Mistake Library

MistakeConsequenceHow to avoid it
Emergency pump test conducted using the same power supply as the main engine roomThe test does not genuinely verify the emergency condition the pump is designed forTest the emergency pump in its actual independent power supply configuration
Hydrant pressure verified only at the point nearest the pumpPressure shortfall at the most unfavourable points not detectedAlso verify pressure at the furthest/most unfavourable hydrants of the system
Fixed extinguishing systems (CO2, foam) checked less frequently than water pumpsMalfunction of the fixed system discovered only in a real emergencyInclude fixed systems in an equally rigorous periodic verification programme

What the PSCO Checks

Port State Control Officers (PSCOs) frequently verify the practical operation of the emergency fire pump during inspection, paying particular attention to its genuine independence from the main power supply.

Operational Tips

Preparation checklist

Educational checklist. This summary supports learning and preparation only. It does not replace the vessel’s approved procedures, manuals, statutory documents, company SMS, or applicable official requirements. Completing it demonstrates neither compliance nor readiness for an inspection: it shows that a list has been read, not that the ship is in order. Always verify the current documents carried on board.

FAQ

Why must the emergency fire pump have an independent power supply?
Because it is designed to remain operative even in the event of fire or failure in the main engine room, a scenario in which the main fire pumps might not be available precisely when most needed.
How often should fixed extinguishing systems such as CO2 be tested?
For CO₂ apply MSC.1/Circ.1318/Rev.1, the ship’s plan and flag/maker requirements: it distinguishes visual checks at least every 30 days, annual inspections and further maintenance. Do not transfer pump intervals to CO₂; testing does not mean discharging into the protected space.
Is testing the emergency pump with the main engine room operational sufficient?
The engine room may remain operational if the prescribed method actually verifies independent power, suction and arrangement. Follow the approved configuration and test plan; indiscriminate machinery shutdown is not required. For the annual test also apply the isolation-valve arrangement specified by MSC.1/Circ.1432.

Related Topics

Fire Drill and Fire SafetyBlackout and Failure Management

Last substantive revision of this page: 15 September 2026 · page fingerprint 575074a18cfa