BS 476 part 6 specifies a method of test, the result being expressed as a fire propagation index, that provides a comparative measure of the contribution to the growth of fire made by an essentially flat material, composite or assembly. It is primarily intended for the assessment of the performance of internal wall and ceiling linings.
Stainless steel support frame andCalcium silicate board combustion chamber.
Three kinds of sample holders for different thickness of the specimens.
Low reflective black finished mild steel Chimney and Cowl assembly complete with thermocouple mounting points.
Compliant stainless steel gas burner.
Two K type mineral insulated thermocouples complete with ceramic insulators.
Two pencil type heaters with 1000w installed in combustion chamber.
Control gas instrumentation including electronic gas on/off valve, flow regulating valve, flow meter and manometer.
Intelligent single phase power controller with feedback loop for accurate control of electric heating elements
DAQ record automatically the mV output from the thermocouples of the flue gases throughout the duration of the test.
According to the test time, automatically adjust the output power.
Data Acquisition system:
Prompted software interface
Data recording and display of cowl temperature against time
Data recording and display of ambient temperature against time
Display of power value in kW
Calculation of output rise and calibration value
Parameters of BS476-6 Flame Propagation Properties Tester:
Apparatus: 400mm (W) x 600mm x (H) x 300mm (D)
Control module: 400mm (W) x 500mm x (H) x 400mm (D)
AC 220V, 50/60Hz, 5A
10 ~ 35 Centigrade
The gas supply specified in the Standard is Standard test gas G112, as specified in BS 4947.