1 The Maritime Safety Committee, at its sixty-eighth
session (28 May to 6 June 1997), approved Guidelines for performance and testing
criteria and surveys of expansion foam concentrates for fixed fire-extinguishing
systems of chemical tankers, given in the annex.
2 Member Governments are recommended to ensure that
tests for type approval and periodical controls of the expansion foam
concentrates for fixed fire-extinguishing systems of chemical tankers are
performed in accordance with the annexed Guidelines.
1 These Guidelines apply to the
foam concentrates for fixed expansion foam fire-extinguishing systems for
Type of foam
2 The type of foam should be
chosen based on the IBC Code, the BCH Code and MSC/Circ.553.
3 The performance and testing
criteria of foam concentrates for chemical tankers could use the procedure
set out in the draft ISO/DIS 7203-1, titled "Low-Expansion Foam
Concentrates", and the MSC/Circ.582, which was based on the above-mentioned
ISO standard, as appropriate.
For type A foams (alcohol-resistant foams), the procedure provided in
MSC/Circ.582 should be modified as follows: .1 three foam-making
nozzles are to be simultaneously employed, located in the horizontal plane
specified in paragraph 3.9.6(a) of MSC/Circ.582; and
.2 tests are to be performed in accordance with the
provisions in paragraphs 3.9.6(b) and (c) of MSC/Circ.582. 5 For type
B foams (regular foams), MSC/Circ.582 can be entirely applied.