Full Description ADOPTED_FROM:EN 16602-70-21:2014 This Standard defines a multitest procedure for the determination of the flammability characteristics of nonmetallic materials under a set of closely controlled conditions. The test procedure covers both individual materials and materials used in configuration. This Standard describes a series of tests to provide data for aid in the evaluation of the suitability of materials for use in a space vehicle crew compartment. The data obtained are in respect to the ease of ignition and the flame propagation characteristics of materials. All nonmetallic materials are inherently flammable, the degree to which this is true is dependant on the chemical nature of the material itself and the environment to which the material is exposed. In the closed environment of a manned spacecraft this can lead to a potentially dangerous situation and close control is therefore required. This standard may be tailored for the specific characteristics and constrains of a space project in conformance with ECSS-S-ST-00.