Two cases of Interior Fire Tests within ISO 9705 for Railway Passenger Coach

초록

Two comparable cases of interior fire tests were conducted within an ISO 9705 room. Since the ISO 9705 test room is smaller than a real railway passenger coach, part of the coach was downsized for the test. The standard 170mm square sand burner using propane gas was located at the end corner of the coach against a seat. The output of the burner was increased in a stepwise manner wherein 75kW is maintained for 2 minutes, 150kW for 8 minutes thereafter, and increased by 50kW additional every 2 minutes. The burner output was in accordance with the standard output of CEN/TS 45545 Part 1 prior to 10 minutes. Unsaturated polyester based GRP wall linings, painted aluminium ceiling linings, PVC floor coverings and seat cushion with urethane foam were installed for an “Old Interior” test, and Phenol based GRP wall linings, aluminium honeycomb ceiling panels, fire retardant rubber floor coverings and neoprene foam seat cushion with anti-flame mesh were tested for a “New Interior” test. The “new interior” demonstrated significantly better fire performance requiring a higher burner output for flashover to occur than the “old interior”. The test fires were extinguished just after onset of flashover. Interior air temperature distributions, interior surface temperatures and heat fluxes were measured during the tests. HRR of the room was also recorded. A flaming area based HRR estimation method was reviewed and compared with the simple Duggan’s summation method applying data from ISO 5660-1 Cone-calorimeter tests. These tests can be used for material optimization and verification of the numerical analysis for train fire.