ASTM E 648：使用辐射热能源的地板包覆材料临界辐射通量测试方法
ASTM E 648：Standard Test Method for Critical Radiant Flux of Floor-Covering Systems Using a Radiant Heat Energy Source
Abstract 摘要
This fire test response standard is designed to provide a basis for estimating one aspect of the fire exposure behavior of a floor-covering system installed in a building corridor. The test environment is intended to simulate conditions that have been observed and defined in full scale corridor experiments.
The test is intended to be suitable for regulatory statutes, specification acceptance, design purposes, or development and research.
The fundamental assumption inherent in the test is that critical radiant flux is one measure of the sensitivity to flame spread of floor-covering systems in a building corridor.
The test is applicable to floor-covering system specimens that follow or simulate accepted installation practice. Tests on the individual elements of a floor system are of limited value and not valid for evaluation of the flooring system.
Note 1—In this procedure, the specimens are subjected to one or more specific sets of laboratory fire test exposure conditions. If different test conditions are substituted or the anticipated end-use conditions are changed, it may not be possible by or from this test to predict changes in the performance characteristics measured. Therefore, the results are strictly valid only for the fire test exposure conditions described in this procedure.
If the test results obtained by this method are to be considered in the total assessment of fire risk, then all pertinent established criteria for fire risk assessment developed by Committee E05 must be included in the consideration.
