F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 5/02 (2006.01) A62C 2/06 (2006.01) F16L 5/04 (2006.01)
Patent
CA 2139192
The invention relates to a firestop assembly (100, 200, 300, 400) for a pipe, comprising first (102, 202, 302, 402) and second (110, 210, 310, 410) intumescent firestop rings. The first intumescent firestop ring overlies the pipe, and extends along the pipe for a first distance, and the second intumescent firestop ring overlies the first intumescent firestop ring and extends along the pipe for a second distance. The first distance is not equal to the second distance, and the firestop assembly so provided is particularly adapted for firestopping a plastic pipe.
Charland Paul J.
Schommer Anthony J.
Minnesota Mining And Manufacturing Company
Smart & Biggar
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