Intumescent fire protective sheaths

Details Intumescent fire protective sheaths Intumescent fire protective sheaths

1983-06-07

1985-04-23

Grimley, A. T.

Electricity: conductors and insulators

Conduits, cables or conductors

Insulated

138103, 156 54, 428377, H01B 734, H01B 1306

Patent

active

045131732

ABSTRACT:
Intumescent fire protective sheaths useful for the protection of electric cables and conduits from open flame damage and methods for making such sheaths. The sheath comprises sheets of substantially inorganic intumescent material capable of arrangement around the cable or the conduit to form a protective layer. The layer is restrained to expand only in the general direction of the electrical cables or conduits upon exposure to open flames. In the unexpanded state, the sheaths dissipate cable-generated heat due to their higher value of thermal conductivity, their relative thinness and their fin-like shape.

REFERENCES:
patent: 3709706 (1973-01-01), Sowman
patent: 3795524 (1974-03-01), Sowman
patent: 3916057 (1974-10-01), Hatch et al.
patent: 4018983 (1977-04-01), Pedlow
patent: 4047965 (1977-09-01), Karst et al.
patent: 4265953 (1981-05-01), Close
patent: 4273879 (1981-06-01), Langer et al.
patent: 4297526 (1981-10-01), Leuchs et al.
patent: 4305992 (1981-12-01), Langer et al.
"Kaowool Blanket Wrap Fire Protection Systems" published by Babcock & Wilcox, a McDermott Company.
"Ceramic Fiber Blanket Wrap for Fire Protection of Cable Trays and Conduits" by Charles E. Chaille and Richard J. Reiman.

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