Firewall seal

摘要

A firewall seal in accordance with the present invention comprises a one-piece sheet of flexible fireproof material folded to form at least a two-ply seal component. Aligned openings are provided in each ply. At least one opening in each ply of the sheet is provided for passing a pipe, and a slit extends from the opening to the edge of the respective ply of the sheet, to allow assembly of the folded sheet on the pipe. The slits are staggered from one play to the other. The seal is provided on one side of the firewall only, and the folded sheet-seal components are covered by a pair of metal plates with each plate having a staggered slot for assembly on the pipe, and fastening means are provided for mounting the plates and folded sheet to the firewall.