Standard Test Method for Fire Testing of School Bus Seat Assemblies

Importancia y uso:

5.1 In this test method fire test response characteristics of a school bus seat assembly are assessed following ignition by a square gas burner.

5.2 This test method is similar in concept to a fire test currently used, and which has been in such use for many years, as the industry standard for flammability testing of school bus seats (see Appendix X1). However, in this test method the paper bag has been replaced by a gas burner as the ignition source.

5.3 The US federal government has issued a flammability test applicable to interior materials in road vehicles, FMVSS 302. FMVSS 302 remains the only regulatory test for assessing fire-test-response characteristics of school bus seats.

5.4 ASTM has issued Test Method D5132 in order to provide a more standardized way of conducting FMVSS 302.

5.5 The test method described in this document provides a significantly higher challenge to school bus seats than the FMVSS 302 federal regulatory test. Therefore, any seat assembly that performs acceptably in this test is likely to meet the requirements of FMVSS 302.

5.6 It is clear that those seat assemblies that exhibit little or no flame spread, short times to flame extinction and little mass loss in this test are likely to exhibit improved performance in an actual fire situation compared to seat assemblies that burn vigorously and have high mass loss.

5.7 This test is primarily useful to distinguish products that, when exposed to these fire conditions, will become fully involved in fire from other products that will not.

Subcomité:

E05.21

Referida por:

E0176-24A, E3020-22

Volúmen:

04.07

Número ICS:

13.220.40 (Ignitability and burning behaviour of materials and products), 43.040.60 (Bodies and body components), 43.080.20 (Buses)

Palabras clave:

bus; fire test; flame spread; gas burner; paper bag; school bus; transportation;