Tiered firestop assembly
AssigneeMinnesota Mining and Manufacturing Company
InventorsPaul J. Charland, Anthony J. Schommer
Life of this patent
Estimating the term…
Abstract
The invention relates to a firestop assembly for a pipe, comprising first and second 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.
Claims24
A firestop assembly for surrounding a pipe having a longitudinal axis, said firestop assembly comprising:
- a) a first intumescent firestop ring adapted to extend for a first distance along the longitudinal axis;
- b) a second intumescent firestop ring overlying said first intumescent firestop ring, said second firestop ring adapted to extend for a second distance along the longitudinal axis, wherein said second distance is not equal to said first distance;
- c) heat transfer means interposed between said first intumescent firestop ring and said second intumescent firestop ring;
- and
- d) means for securing said first and second intumescent firestop rings to a pipe.
A firestop assembly for surrounding a plastic pipe having a longitudinal axis, said firestop assembly comprising:
- a) a first intumescent firestop ring adapted to extend for a first distance along the longitudinal axis, said first intumescent firestop ring comprising at least one layer of an intumescent mat;
- b) a second intumescent firestop ring overlying said first intumescent firestop ring, said second intumescent firestop ring comprising at least one layer of an intumescent mat and adapted to extend for a second distance along the longitudinal axis, wherein said second distance is not equal to said first distance;
- c) heat transfer means interposed between said first intumescent firestop ring and said second intumescent firestop ring:
- and
- d) band clamp means for securing said first and second intumescent firestop rings to a pipe.
A method of applying a firestop assembly to a pipe having a longitudinal axis and an outer peripheral surface, comprising:
- a) wrapping the outer peripheral surface of the pipe with a first intumescent firestop ring extending for a first distance along the longitudinal axis of the pipe;
- b) wrapping a second intumescent firestop ring over the first intumescent firestop ring and around the pipe, the second firestop ring extending for a second distance along the longitudinal axis of the pipe, wherein the second distance is not equal to the first distance;
- c) providing heat transfer means interposed between the first intumescent firestop ring and the second intumescent firestop ring;
- and
- d) securing the first and second intumescent firestop rings to the pipe.
Dependencies are inferred from the claim text.