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The BS476-6 Fire Propagation test provides information on the influence that a simple material, a composite of materials or an assembly of materials, would make to the rate of fire growth within a compartment.
Although often termed a “heat release” test, the result represents a much more complicated product of several factors including ignition, heat release and thermal properties. Comparisons are made between the effluent gas temperature/time relationships within the chimney of the apparatus for a reference material and for the product under evaluation. The reference material is also used as a calibration sheet to ensure correct setting and operation of the apparatus and consistency between tests.
Specification and Features:
Apparatus Features:
•Stainless steel legs and chamber support chassis
•12mm thick calcium silicate combustion chamber
•12mm thick calcium silicate specimen holder
•3 off Calcium silicate spacer boards for various thickness samples
•3 off Non combustible ceramic gaskets
•Low reflective black finished mild steel Chimney and Cowl assembly complete with thermocouple mounting points
•Compliant stainless steel gas burner
•Two high power cartridge heaters connected with high temperature supply cable
•Two K type mineral insulated thermocouples complete with ceramic insulators
Control module features:
•Control gas instrumentation including electronic gas on/off valve, flow regulating valve, flow meter and manometer
•Temperature measurement with cold junction compensation
•Intelligent single phase power controller with feedback loop for accurate control of electric heating elements
•Digital Watt transducer allowing software control of power value of electric heaters
•Integrated timer with digital display on software interface
•Bench top control enclosure with 3 meter umbilical connecting cable assembly
•Remote handset to allow ignition of Gas burner if apparatus is located away from control module
Data Acquisition system and Software Package featuring;
•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
•Calibration routine
•Calculation of output rise and calibration value
Technical Data and Requirements:
Electrical: 230 volts – Nominal 10 Amps
Ambient Temperature: Operating 10°C to 35°C
Dimensions: Apparatus: 400mm (W) x 600mm x (H) x 300mm (D)
Control module: 400mm (W) x 500mm x (H) x 400mm (D)
Gas Supplies: The gas supply specified in the Standard is Standard test gas G112, as specified in BS 4947.
Flow: Gas flow for burner adjustable from 0 to 5 nl/min
Pressure: 1kPa
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