Noncombustible 22
Noncombustible 22 :
A material that, in the form in which it is used and under the conditions anticipated will not aid combustion or add appreciable heat to an ambient fire. Materials, where tested in accordance with ASTM E136, Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 7500C, and conforming to the criteria contained in Section 7 of the referenced standard shall be considered as noncombustible
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