1, clean air conditioning system with air duct: galvanized sheet, stainless steel; (may occur in the use of dust pollution of glass fiber reinforced plastic, composite materials disabled)
2, the central air-conditioning system with duct: galvanized sheet, color steel insulation board; (
vanitation pipe
vanitation pipe
Can use FRP, composite materials)
3, environmental control system with duct: galvanized sheet, stainless steel; (can use plastic, glass steel, composite materials)
4, industrial ventilation system with duct: steel plate, galvanized sheet; (Libre ventilation pipe. Can use plastic, glass steel, composite materials)
Note: FRP duct can be divided into organic, inorganic two, according to the design specifications have fire requirements of the ban on organic materials;
5, special occasions with the use of ducts: mine coated air duct, mining plastic ventilation pipe; (require flame retardant anti-static mine safety features)