This European Standard specifies requirements for chemical and physical properties, and minimum performance requirements of low expansion foams suitable for surface application to water-miscible liquids. Requirements are also given for marking.
IMPORTANT NOTE: In this part of the European Standard, the fire performance is tested using acetone as the fuel, which also forms the basis for the performance classification. However, there are a large number of water-miscible liquids, which have more or less different properties to acetone. It has been shown by tests using other fuel that the performance of various foams can differ considerably. Examples of such fuels are Isopropylalcohol (IPA) and Methyl Ethyl Ketone (MEK). It is therefore essential that the user checks for any unfavourable or unacceptable loss of efficiency when the foam is used against fires in any other water-miscible fuels than acetone. The fire test conditions and procedure given in J.2 can be used in order to achieve results comparative with acetone and related requirements. Other fuels can also require the use of other application rates, both higher and lower, to achieve relevant test data. Other fuel trays can then be used correcting the amount of fuel to achieve the same fuel depth as specified in I.2.
It is also essential for the user to note, that other fuel depths and methods of application than those specified in I.2, can cause considerable loss of efficiency and these matters should be carefully considered by the user when assessing the suitability for particular applications.
NOTE : Some concentrates complying with this Part of EN 1568 can also comply with other Parts and therefore can also be suitable for application as medium and/or high expansion foams.