BS476-6 Fire Propagation Apparatus

BS 476 PART 6

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.

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    Specification & 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 & 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

    Experts since 1998

    We have been involved in the design and manufacture of fire testing, thermal analysis, rheology and spectroscopy instruments since the mid-eighties.

    Concept Equipment design and manufacture fire testing instruments according to international test methods.

    Location —

    Units 57-59 The Vinery, Arundel Road, Poling, West Sussex, BN18 9PY, UK