Chapter 2 – Control of Ignition Source
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1321 – Guidelines for Measures to Prevent Fires in Engine-Rooms and Cargo Pump-Rooms – (11 June 2009) - Annex – Guidelines for Measures to Prevent Fire in Engine-Rooms and cargo Pump-Rooms - Part IV – Cargo Pump-Rooms - Chapter 2 – Control of Ignition Source

Chapter 2 – Control of Ignition Source

Parent topic: Part IV – Cargo Pump-Rooms

1 General

  1.1 The steam and heating media temperature within the cargo area should not to exceed 220°C.

  1.2 Any potential ignition sources should be protected.

2 Lighting system and protection of electrical equipment

  2.1 Glazed port lights providing illumination to the pump-rooms should be effectively protected from mechanical damage by strong covers secured from the side of the safe space.

  2.2 Lighting other than emergency lighting should be interlocked with ventilation.

3 Protection of penetration to other spaces

  3.1 Any penetration of the engine-room boundary or safety area passing through a pump-room bulkhead should be provided with the following:

  • .1 gas tight sealing device with efficient lubricant (periodic greasing type is not permitted); and

  • .2 temperature measuring device.

4 Temperature monitoring system for pumps in cargo pump-rooms

4.1 Design requirements

  4.1.1 Except for pump-rooms intended solely for ballast transfer or fuel oil transfer, temperature monitoring systems for pumps should be provided.

  4.1.2 The following pumps installed in cargo pump-rooms, which may be driven by shafts passing through pump-room bulkheads, are included:

  • .1 cargo pumps including slop pumps;

  • .2 ballast pumps;

  • .3 stripping pumps; and

  • .4 tank cleaning pumps.

  4.1.3 The following pumps might be omitted:

  • .1 small pumps of 1 m3/h capacity or less; and

  • .2 bilge pumps.

4.2 System arrangements

  4.2.1 In case of parallel bearing support with common oil bath, only one bearing sensor might be installed.

  • .1 bulkhead shaft glands;

  • .2 bearings; and

  • .3 pump casings.

  4.2.2 In case of parallel bearing support with common oil bath, only one bearing sensor might be installed.

  4.2.3 The range of temperature for sensors is recommended to be from 0°C to 250°C and the setting point to about 60°C to 80°C in consideration to the kind of pumps, cargoes and environmental condition, which would automatically shut down the pump when the set point is reached.

  4.2.4 Sensors should be installed so that the end of sensor reaches the measuring points and is fixed permanently.

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