Fire-rated modular duct assembly suitable for exhausting flammable or hazardous gases, vapours and other materials

摘要

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.

主权项

1. A modular fire-rated exhaust duct assembly comprising:
two or more exhaust duct modules; each of said exhaust duct modules having an inner duct liner and an outer casing, and a void being formed between at least a portion of space between said inner duct liner and said outer casing, said void being configured for receiving an insulation material, and including one or more insulation encapsulation sections configured to connect to said inner duct liner and said outer casing to contain said insulation material in said void; a first exterior flange connector, and one end of each of said exhaust duct modules being configured for receiving said first exterior flange connector; a second exterior flange connector, and another end of each of said exhaust duct modules being configured for receiving said second exterior flange connector; said inner duct liner comprising a flange configured to be affixed to said first exterior flange connector and a flange configured to be affixed to said second exterior flange connector; said first and said second exterior flange connectors being configured to form a field assembly junction for coupling respective ends of said exhaust duct modules to form a single exhaust duct run; and a joint encasement section configured to be field connectable to each of said exhaust duct modules and encase said junction.