Pipe floor/wall penetration bellows seal

A fire stop sealing system for creating a fire seal between a pipe, selected from commercial mechanical and plumbing pipes, and a wall, a floor or a ceiling of a building, and for maintaining the fire seal while accommodating axial movement or expansion of the pipe and later motion of the pipe, the fire stop sealing system comprising:

• flexible bellows extending between a first end and a second end, the first end including a base plate configured to attach to a substrate comprising the wall, the floor or the ceiling, the base plate having an inner ring having an inner surface with an inner diameter, and a shroud adjacent the baseplate and extending around the bellows;
• wherein the inner ring receives the pipe therethrough, the pipe having an outer surface with an outer diameter, which is smaller than the inner diameter of the inner ring, and wherein the inner ring forms a gap between the entirety of the inner surface of the inner ring and an adjacent portion of the outer surface of the pipe and to maintain a substantially equal space within the gap between the entirety of the inner surface of the inner ring and the adjacent portion of the outer surface of the pipe sufficient to guide the pipe axially during the axial movement or expansion of the pipe and to accommodate the lateral motion of the pipe while maintaining the fire seal;
• one or more connectors attaching the baseplate to a substrate;
• wherein the pipe extends through an aperture in the substrate;
• the bellows having a first length in a first position and a second length in a second position;
• and
• wherein the bellows is configured to move from the first position to the second position upon axial expansion of the pipe.