Fire and liquid seals for pipes and conduits and method of forming same

• US 4,086,736 A
• Filed: 12/16/1976
• Issued: 05/02/1978
• Est. Priority Date: 12/16/1976
• Status: Expired due to Term

• Current Assignee: Daniel International Corp. (Fluor Corporation)
• Original Assignee: Daniel International Corp. (Fluor Corporation)
• Inventors: Landrigan, Larry P.
• Primary Examiner(s): Ridgill, Jr., James L.
• Application Number:
  US05/751,326
• Time in Patent Office: 502 Days
• Field of Search: 52/221, 52/302, 52/506, 428/388, 428/447, 128/156, 128/155, 264/46.4, 264/46.9, 264/46.6, 285/185, 285/192, 285/235, 285/236, 403/50, 248/56
• US Class Current: 52/220.8
• CPC Class Codes: F16L 5/04 to form a firebreak device

Abstract

A fire and/or liquid seal in a structural wall has a tube-like support extending through the wall with conduits positioned in the support and surrounded by insulation material in the form of silicone foam in one embodiment or packed ceramic fibers in another embodiment with protective shield means being clamped to the support and the conduits on the opposite sides of the wall; in another embodiment a layer of silicone elastomer is provided in a tube-like support extending through the wall adjacent a layer of silicone insulating foam surrounding conduits extending through the support in a penetration seal. A method of forming a seal in a horizontal building floor includes pouring of the foam in a tube-like support extending through the floor with the foam held in position by a cover across the lower edge of the opening, liquid elastomer poured on the upper surface of the foam eventually hardens to protect the foam layer but leaks through the foam before hardening to reveal any imperfections in the foam if such are present so that the plugging of such leaks followed by hardening of the liquid elastomer in the imperfection provides a seal that is free from leaks.

Claims

1. A fire seal for a structural wall penetration comprising a support pipe of circular cross-section embedded in and extending through a structural wall, a conduit of circular cross-section of smaller size than said support pipe oriented in and extending through said support pipe with the outer wall of said conduit being spaced from the inner wall of said support pipe, a packing of heat resistant thermal insulation material comprising a body of silicone foam occupying the space between the outer wall of said conduit and the inner wall surface of said support pipe, a first flexible boot means extending between one end of said support pipe and said conduit on one side of and externally of said structural wall, inelastic fastening means for clampingly and sealingly fastening said first flexible boot means to said support pipe and said conduit, a second flexible boot means positioned externally of said structural wall extending between a second end of said support pipe and a second end of said conduit on the opposite side of said structural wall from said first flexible boot, second inelastic fastening means clampingly and sealingly fastening said second flexible boot means to said second end of said support pipe and said second end of said conduit.

2. The invention of claim 1 wherein said first and second fastening means comprise stainless steel band-type clamps.

3. The invention of claim 1 wherein said flexible boot means is formed of aluminum coated silicone glass fiber.

4. The invention of claim 1 wherein said boot means are formed of silicone rubber.

5. A fire seal for a structural wall penetration comprising hollow support means embedded in and extending through a structural wall-like member and having an internal volumetric space extending through said structural wall and having an outer peripheral boundary defined by an inner wall of the support means, a conduit oriented in and extending through said volumetric space of said support means with the outer wall of said conduit being spaced from said support means, a packing of thermal insulation material comprising a body of silicone foam occupying the volumetric space between the outer wall of said conduit and the inner wall surface of said support means and shielding means immediately adjacent said packing of thermal insulation material comprising a layer of silicone elastomer extending across the space between said outer wall of the conduit and the inner wall of the support means for protecting said thermal insulation material from the direct impingement of flame or hot gases thereon in the event of a fire adjacent said structural wall-like member.

6. The invention of claim 5 wherein said support means comprises a tube-like means of quadrilateral cross-sectional configuration.

7. The invention of claim 5 wherein said structural wall-like member comprises a floor portion, said hollow support means comprises a metal tube-like means embedded in said floor portion, said body of silicone foam is positioned in the lower extent of said tube-like means of said layer of silicone elastomer overlies and is bonded to said body of silicone foam.

8. A gas and liquid type seal for a structural wall penetration opening through which a conduit of smaller size than the penetration opening extends, said seal comprising a packing of thermal insulation material occupying the space between said conduit and the surface of the penetration opening, a first flexible boot means connected on one end by wall attachment means to one side of said wall adjacent said penetration opening, a second flexible boot means connected to the opposite side of said wall by clamp members and inelastic clamping means for clamping the ends of said flexible boot members opposite their connection to the wall to said conduit at a location spaced outwardly from the plane of the wall surface to which the second flexible boot means is connected for providing a sealed connection of said second boot means to said conduit.

9. The invention of claim 8 wherein said flexible boot means each comprises a conically shaped rubber sleeve having separable edge portions extending along its length so as to permit said sleeve to be positioned about said conduit and a plurality of clamping connector means extending through said edge portions of said shield to clamp said edge portions together to provide a resultant sealed connection between said edge portions.

10. The invention of claim 9 wherein said wall attachment means comprises a plurality of arcuate clamps and a plurality of bolts mounted in said wall and passing through said clamps and to the edge of said conically shaped rubber sleeve for clamping said sleeve to said wall.

11. The invention of claim 8 wherein said first and second flexible boot means are each of conical shape and have two separable edge portions permitting said boots to be positioned over said conduit, one of said separable edge portions being of U-shaped configuration defining a slot in which the other edge portion is received and edge clamping means for clamping said edge portions together to provide a sealed juncture between said edge portions.

12. The invention of claim 11 wherein said wall attachment means comprises arcuate clamp members forcefully urging one end of said boot members against said wall.

13. The invention of claim 12 wherein said packing of thermal insulation material comprises a body of ceramic fibers.

14. A fire seal for a structural wall penetration comprising a support pipe of circular cross-section embedded in and extending through a structural wall, a conduit of circular cross-section of smaller size than said support pipe oriented in and extending through said support pipe with the outer wall of said conduit being spaced from the inner wall of said support pipe, a packing of thermal insulation material comprising a body of ceramic fibers occupying the space between the outer wall of said conduit and the inner wall surface of said support pipe, a first flexible boot means extending between one end of said support pipe and said conduit on one side of and externally of said structural wall, inelastic fastening means for clampingly and sealingly fastening said first flexible boot means positioned externally of said structural wall extending between a second end of said support pipe and a second end of said conduit on the opposite side of said structural wall from said first flexible boot, second inelastic fastening means clampingly and sealingly fastening said second flexible boot means to said second end of said support pipe and said second end of said conduit.

15. The invention of claim 14 wherein said first and second inelastic fastening means comprise stainless steel band-type clamps.

16. The invention of claim 15 wherein said first and second flexible boot means are each of conical shape and have two separable edge portions permitting said boots to be positioned over said support pipe and conduit, one of said separable edge portions being of U-shaped configuration defining a slot in which the other edge portion is received and edge clamping means for clamping said edge portions together to provide a sealed junction between said edge portions.

17. The invention to claim 16 wherein said edge clamping means comprises a plurality of nut and bolt assemblies.

18. The invention of claim 17 wherein said boot means are formed of silicone rubber.