4 Method of Test
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 4 – Optional Small Scale Test Method for High–Expansion Foam Concentrates to be Used With Inside Air - 4 Method of Test

4 Method of Test

Parent topic: Appendix 4 – Optional Small Scale Test Method for High–Expansion Foam Concentrates to be Used With Inside Air

4.1 Principle

  4.1.1 The foam properties of the foam concentrate should be determined using the following two evaluation parameters:

  • .1 the expansion ratio as a function of gas temperature; and

  • .2 the drainage time measured at ambient temperature.

  • Note: Pre-normative testing has verified that drainage time is usually very difficult to record at elevated temperatures.

  4.1.2 Normally the foam properties should be measured both with freshwater and with simulated seawater specified in standards ISO 7203-2, annex F, and EN 1568-2, annex G.

4.2 Test equipment

 The following test equipment is necessary for the tests:

  • .1 fire test compartment, as described within this document;

  • .2 propane gas burner, as described in standard ISO 9705;

  • .3 high-expansion foam generator, as described within this document;

  • .4 foam collector vessel for expansion and drainage measurements, as described in standards ISO 7203-2, annex F, and EN 1568-2, annex G;

  • .5 premix pressure vessel;

  • .6 air compressor;

  • .7 load cell; and

  • .8 stopwatch.

4.3 Tolerances

 Unless otherwise stated, the following tolerances should apply:

.1 length: ± 2% of value;
.2 volume: ± 5% of value;
.3 time: ± 5 s; and
.4 temperature: ± 2% of value.

 The tolerances are not applicable to the evaluation parameters.

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