Fire-rated modular duct assembly suitable for exhausting flammable or hazardous gases, vapours and other materials
DC CAFCFirst Claim
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1. An inner duct liner for a fire-rated exhaust module having an outer casing and first and second external flange connectors, said inner duct liner comprising:
- one or metallic sections formed into a tubular structure with a defined cross-sectional shape and comprising a first transversal end and a second transversal end;
each of said metallic sections having a longitudinal edge, and the longitudinal edges of adjacent metallic sections being joined together utilizing a connection mechanism to form an air tight and liquid seal between the longitudinal edges;
said first transversal end including a flange configured to be affixed to the first external flange connector; and
said second transversal end including a flange configured to be affixed to the second external flange connector.
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Abstract
A fire-rated exhaust duct system comprising a modular configuration or structure. The fire-rated exhaust duct system comprises a plurality of exhaust duct sections. Each of the exhaust duct sections is configured to be joined or connected with other exhaust duct sections in the field or at an installation site, e.g. in building housing a kitchen facility or a laboratory facility to form longer sections or runs for exhaust duct system.
80 Citations
13 Claims
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1. An inner duct liner for a fire-rated exhaust module having an outer casing and first and second external flange connectors, said inner duct liner comprising:
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one or metallic sections formed into a tubular structure with a defined cross-sectional shape and comprising a first transversal end and a second transversal end; each of said metallic sections having a longitudinal edge, and the longitudinal edges of adjacent metallic sections being joined together utilizing a connection mechanism to form an air tight and liquid seal between the longitudinal edges; said first transversal end including a flange configured to be affixed to the first external flange connector; and said second transversal end including a flange configured to be affixed to the second external flange connector. - View Dependent Claims (2, 3, 4, 9)
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- 5. The inner duct liner as claimed in 2, wherein said one or more metallic sections comprise two pieces of metal, each formed into a L-shaped section and joined together to form a generally rectangular or square cross-sectional shape.
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8. The inner duct liner as claimed in 2, wherein said one or more metallic sections comprise four pieces of flat metal, and joined together to form a generally rectangular or square cross-sectional shape.
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10. An inner duct liner for a fire-rated exhaust module having an outer casing and first and second external flange connectors, said inner duct liner comprising:
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a plurality of metallic sections formed into a structure having a generally rectangular cross-sectional shape and comprising a first transversal end and a second transversal end; each of said metallic sections having a longitudinal edge, and the longitudinal edges of adjacent metallic sections being joined together utilizing a continuous weld to form an air tight and liquid seal between the longitudinal edges; said first transversal end including a flange configured to be affixed to the first external flange connector; said second transversal end including a flange configured to be affixed to the second external flange connector; said metallic sections being formed from a metallic material the same as the first and second external flange connectors, so as to avoid galvanic action. - View Dependent Claims (11, 12, 13)
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Specification