Devices for the fire stopping of plastics pipes

Details Devices for the fire stopping of plastics pipes Devices for the fire stopping of plastics pipes

1984-07-30

1985-12-24

Raduazo, Henry E.

Static structures (e.g., buildings)

Controlled by condition responsive means

52232, 52317, 138103, E04H 900

Patent

active

045597456

ABSTRACT:
A device for shutting-off a plastics pipe in the event of a fire comprises a sheath of a flexible refractory fabric around a portion of the pipe within or adjacent a fire-resisting partition such as a wall or floor. A spring is placed under tension around the fabric and acts to radially constrict the pipe and sheath, when the pipe softens in the event of a fire. Upon subsequent burning, the burnt plastics forms a foam-like carbon mass which plugs the constricted sheath.

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patent: 4221092 (1980-09-01), Johnson
patent: 4307546 (1981-12-01), Dolder
patent: 4424867 (1984-01-01), Mallow
patent: 4493173 (1985-01-01), Rohaut

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