4 TEST PROCEDURE
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1387 – Revised Guidelines for the Approval of Fixed Water-Based Local Application Fire-Fighting Systems for Use in Category A Machinery Spaces (MSC/Circ.913) – (10 December 2010) - Annex – Revised Guidelines for the Approval of Fixed Water-Based Local Application Fire-Fighting Systems for Use in Category A Machinery Spaces - Appendix – Test Method for Fixed Water-Based Local Application Fire-Fighting Systems - 4 TEST PROCEDURE

4 TEST PROCEDURE

Parent topic: Appendix – Test Method for Fixed Water-Based Local Application Fire-Fighting Systems

4.1 Pre-burn time

 Each fuel oil spray should be ignited and allowed to burn from 10 s to 15 s prior to system operation.

4.2 Measurements

4.2.1 Fuel oil spray system

  4.2.1.1 The fuel oil flow rate and pressure in the fuel oil spray system should be verified prior to the test.

  4.2.1.2 The fuel oil spray system pressure should be measured during the test.

4.2.2 Oxygen concentration at the fire location

 Oxygen concentration should be measured at 100 mm below and 500 mm behind the fuel oil spray nozzle.

4.2.3 Water spray system pressure and flow rate

 The system water pressure and flow rate should be measured using suitable equipment.

4.3 Operation of the fire-fighting system

  4.3.1 The water spray system should be activated within the pre-burn time specified in section 4.1.

  4.3.2 The fires should be extinguished within 5 min of water application.

  4.3.3 The fuel oil spray should be operated for at least 15 s after fire extinguishment.

  4.3.4 The water spray system should be operated for a minimum of 1 min after fire extinguishment.

4.4 Observations during the fire test

 During the test, the following observations should be recorded:

  • .1 start of the ignition procedure;

  • .2 start of the test (ignition);

  • .3 time when the extinguishing system is activated;

  • .4 time when the extinguishing system is shut off;

  • .5 time of re-ignition;

  • .6 time when the fuel supply to the nozzle is stopped;

  • .7 time when the fire is extinguished; and

  • .8 time when the test is terminated.

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