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  2. Boiler explosion - Wikipedia

    en.wikipedia.org/wiki/Boiler_explosion

    [9] [13] Even a well-maintained firebox will fail explosively if the water level in the boiler is allowed to fall far enough to leave the top plate of the firebox (crown sheet) uncovered. [14] This can occur when crossing the summit of the hill, as the water flows to the front part of the boiler and can expose the firebox crown sheet.

  3. Combustibility and flammability - Wikipedia

    en.wikipedia.org/wiki/Combustibility_and...

    A non-combustible material [17] is a substance that does not ignite, burn, support combustion, or release flammable vapors when subject to fire or heat, in the form in which it is used and under conditions anticipated. Any solid substance complying with either of two sets of passing criteria listed in Section 8 of ASTM E 136 when the substance ...

  4. Spontaneous combustion - Wikipedia

    en.wikipedia.org/wiki/Spontaneous_combustion

    A large compost pile can spontaneously combust if improperly managed. Spontaneous combustion or spontaneous ignition is a type of combustion which occurs by self-heating (increase in temperature due to exothermic internal reactions), followed by thermal runaway (self heating which rapidly accelerates to high temperatures) and finally, autoignition. [1]

  5. Petrofac Fails to Ignite the Market - AOL

    www.aol.com/2012/08/13/petrofac-fails-to-ignite...

    LONDON -- Petrofac (ISE: PFC.L) , the provider of oil and gas facilities solutions, saw its share price dip by 5.69% to 1,478 pence despite posting encouraging results for the first half of 2012.

  6. Forced-air gas - Wikipedia

    en.wikipedia.org/wiki/Forced-air_gas

    Each room has an outlet from the duct system, often mounted in the floor or low on the wall – some rooms will also have an opening into the cold air return duct. Depending on the age of the system, forced-air gas furnaces use either a pilot light or a solid-state ignition system (spark or hot surface ignition) to light the natural gas burner. [3]

  7. Pilot light - Wikipedia

    en.wikipedia.org/wiki/Pilot_light

    An alternative to the pilot light is a system to create a high voltage electrical arc or spark between two electrodes, in order to light the gas flowing to the burner. Fail-safe design for such a system requires the burner flame to be detected by passing an electric current through the flame, which is received by the flame rectification circuit ...

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