7 Application of Test Results
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1384 – Guidelines for the Testing and Approval of Fixed High-Expansion Foam Systems – (10 December 2010) - Annex – Guidelines for the Testing and Approval of Fized High-Expansion Foam Systems - Appendix 1 – Fire Test Method for Fixed High-Expansion Foam Systems - 7 Application of Test Results

7 Application of Test Results

  7.1 Systems that have been successfully tested to the provisions of section 3 may be installed in different size spaces according to the following:

  • .1 the extinguishing system configuration and filling rate used for the test compartment 1 tests may be applied to systems for the protection of shipboard spaces of equal or less volume than 500 m3;

  • .2 the extinguishing system configuration and filling rate used for the test compartment 2 tests may be applied to systems for the protection of shipboard spaces of equal or greater volumes than that of test compartment 2; and

  • .3 for the protection of shipboard spaces with volumes between test compartments 1 and 2, linear interpolation of the filling rates obtained for test compartments 1 and 2, respectively, should be applied. Despite the above, the filling rate used for the test compartment 2 tests may be applied to systems for the protection of small spaces within protected machinery spaces having volumes less than test compartment 2, such as workshops and similar spaces not containing combustion engines, boilers, purifiers and similar equipment.

  7.2 If freshwater is used in the fire tests, any differences in expansion ratios between freshwater and simulated seawater (nominal expansion ratio measured according to standard EN13565-1, annex G, and expansion ratio measured according to "small scale test method") should be reflected in the manufacturer's installation guide. If the foam expansion ratios differ between freshwater and simulated seawater, the nominal application rate used in the fire tests should be adjusted to the level that corresponds to the nominal filling rate based on the lower expansion ratio.

  Example: The fire tests were performed using freshwater with nominal filling rate of 2 m/min, corresponding to a nominal application rate of 4 ⋉/min/m2 and nominal expansion ratio with freshwater of 500. Tests according to "small scale test method" and standard EN 13565-1, annex G, showed that the lowest expansion ratio is 425 with seawater. The design application rate should in this case be at least: 4.0*(500/425) = 4.7 ⋉/min/m2.

Figure 1

Parent topic: Appendix 1 – Fire Test Method for Fixed High-Expansion Foam Systems
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