Appendix 2 – Component Manufacturing Standards for High-Expansion Foam System Generators
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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 2 – Component Manufacturing Standards for High-Expansion Foam System Generators

Appendix 2 – Component Manufacturing Standards for High-Expansion Foam System Generators

  1 All foam generator nozzles should be tested in accordance with the following items stipulated in the indicated paragraphs of the Guidelines developed by the Organizationfootnote:

  • .1 paragraph 3.1 – Dimensions;

  • .2 paragraph 3.11.1 – Stress corrosion;

  • .3 paragraph 3.11.2 – Sulphur dioxide corrosion: Visual inspection only may be carried out;

  • .4 paragraph 3.11.3 – Salt spray corrosion: The test may be carried out at NaCl concentration of 5%. Paragraph 3.14.2 in appendix A to MSC/Circ.1165, as amended by MSC.1/Circ.1269, need not apply;

  • .5 paragraph 3.15 – Resistance to heat: Where the components are made of steel, this test need not be applied;

  • .6 paragraph 3.17 – Impact test; and

  • .7 paragraph 3.22 – Clogging test: where the diameter of the opening of the nozzle exceeds 2.5 mm, this test need not be applied.

  2 Foam generators should also be tested in accordance with the following items stipulated in standard EN 13565-1; where applicable, a representative sample of components from the generator may be used:

  • .1 clause 4: general construction requirements (4.1 (connections), 4.5 (corrosion resistance of metal parts) and 4.8 (heat and fire resistance));

  • .2 clause 5: discharge coefficients;

  • .3 clause 6: quality of foam (6.2 (high-expansion components)); and

  • .4 clause 9: components for medium and high-expansion foam systems.

  • Foam generators should also be able to withstand the effects of vibration without deterioration of their performance characteristics when tested in accordance with paragraph 4.15 of appendix A of MSC/Circ.1165, as amended by MSC.1/Circ.1269, except that three foam generators should be subjected to the vibration test and the test duration should be 2 h. The mounting arrangement and orientation of the foam generators should be in accordance with the manufacturers' instruction. After the vibration test, the generators should show no visible deterioration. The generator should be connected to a suitable water supply and operated at the maximum operating pressure for 15 min to demonstrate that the generator did not suffer damages. Equivalent alternative testing standards may be used as determined by the Administration. The mounting arrangement and orientation of the foam generators should be in accordance with the manufacturers' instruction.

Parent topic: Annex – Guidelines for the Testing and Approval of Fized High-Expansion Foam Systems
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