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Ductmate Weld Pins are used to permanently secure insulation to the inside of sheet metal ductwork. Designed to work with all the standard resistance welding equipment.
Galvanized mild steel is the standard and most common material used in fabricating ductwork. For insulation purposes, metal ducts are typically lined with faced fiber glass blankets (duct liner) or wrapped externally with fiber glass blankets (duct wrap).When called for, a double walled duct is used.ucts are used in heating, ventilation, and air conditioning (HVAC) to deliver and remove air. The needed airflows include, for example, supply air, return air, and exhaust air. Ducts commonly also deliver ventilation air as part of the supply air.