Why Low Expansion Foam Used On Deck And High Expansion On Engine Room?

             High expansion foam, since its expansion ratio being high and its density being low, will be blown off by air if we use it on the deck .
             High expansion foam is used in engine room because the engine room being a closed compartment, the foam can completely fill the same

Note: In cargo holds, usage of high / low expansion foam depends purely on the type of cargo carried

          The mixing ratio of foam can be of three types
                   - Low expansion ( mixing ratio – 20:1)
                   - Medium expansion (20:1 to 200:1)
                   - High expansion (200:1 to 1000:1)


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