banner.jpg 10.3850/978-981-08-7724-8_15-03 An Investigation of the UL-94V Plastics Flammability Test J.G. Quintiere1,a, B.P. Downey1,2 and R.E. Lyon3 Quintiere, J.G.; Downey, B.P.; Lyon, R.E. 1Department of Fire Protection Engineering, University of Maryland, College Park, MD 20742, USA. ajimq@umd.edu 2Currently with SAIC, Fairfax, VA, USA 3Airport and Aircraft Safety Division, William J. Hughes Technical Center, Federal Aviation Administration, Atlantic City, NJ, USA ABSTRACT

The UL-94 Vertical Burning Flammability Test (UL-94V) is studied in an attempt to predict its performance from conventional material fire properties. It is shown that the heat release parameter (HRP), its critical heat flux for piloted ignition (CHF), and the thermal response parameter (TRP) underlie most of the behaviour of the test. The burner ignition premixed flame and the laminar diffusion flame of a material have a nominal heat flux of about 60 kW/m2, and the flame height is found proportional to the heat release rate per unit area (HRR) to the first power. Also critical values of HRR required for ignition, sustained burning, and flame spread in the test were theoretically estimated at 80, about 250, and 300 kW/m2, respectively. HRR was found to be a significant factor in correlating UL-94V ratings.

Keywords: UL-94V, Prediction, HRR, Heat flux.

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