4 Periodical Controls of Foam Concentrates Stored on Board
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC/Circular.798 – Guidelines for Performance and Testing Criteria and Surveys of Medium-Expansion Concentrates for Fire-Extinguishing Systems – (Adopted on 9 June 1997) - Annex - Guidelines for Performance and Testing Criteria and Surveys of Medium-Expansion Foam Concentrates for Fire-Extinguishing Systems - 4 Periodical Controls of Foam Concentrates Stored on Board

4 Periodical Controls of Foam Concentrates Stored on Board

 The attention of the Administration is drawn to the fact that particular installation conditions (excessive ambient temperature, incomplete filling of the tank etc.) may lead to an abnormal ageing of the concentrates.

 For the periodical control of foam concentrate, the tests under 4.1 to 4.5 should be performed. They should be carried out at laboratories acceptable to the Administration.

 The deviations in the values obtained by these tests, in respect of those obtained during she type approval tests, should be within ranges acceptable to the Administration.

 Tests under 4.1, 4.3 and 4.4 should be carried out on samples maintained at 60°C for 24 h and subsequently cooled to the test temperature.

  4.1 Sedimentation

According to 3.3 above.

  4.2 pH value

According to 3.5 above.

  4.3 Expansion ratio

According to 3.6 above.

  4.4 Drainage time

According to 3.7 above.

  4.5 Volumic mass

According to 3.10 above.

Parent topic: Annex - Guidelines for Performance and Testing Criteria and Surveys of Medium-Expansion Foam Concentrates for Fire-Extinguishing Systems
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