Annex – Scientific Methods on Scaling of Test Volume for Fire Test on Water-Mist Fire-Extinguishing Systems
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Annex – Scientific Methods on Scaling of Test Volume for Fire Test on Water-Mist Fire-Extinguishing Systems

  1 Scaling from the maximum tested volume to larger volumes may be accepted based on the approval fire test scenarios in appendix B, paragraph 4.3.1, table 1 of the Revised Guidelines for the approval of equivalent water-based fire-extinguishing systems for machinery spaces and cargo pump-rooms (MSC/Circ.1165), provided that:

  • .1 none of the test fires 1 to 4 has an extinguishment time exceeding 10 min; and

  • .2 provisions of the table below are met.

    Average time to extinguishment for the three fires with the longest extinguishing times (tests 1 to 8) Scaling factor
    ≤10 min 2
    12.5 min 1.5
    15 min 1

  2 Linear interpolation may be used for average extinguishing times between the values above. The ceiling height should not be increased over that tested. All the volumes referred to should be the net volume.

Parent topic: MSC.1/Circular.1385 – Scientific Methods on Scaling of Test Volume for Fire Test on Water-Mist Fire-Extinguishing Systems – (10 December 2010)
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