The raw materials of commonly used panels, aluminum profiles and other key finished products in the manufacture and installation of air ducts shall meet the requirements of the manufacturer's design plan for galvanized welded air valves and the requirements of the national implementation standards for relevant commodities, and shall be certified by the original galvanized ventilation duct manufacturer's testing. , When the raw materials enter the site, the project acceptance shall be carried out according to the relevant specifications of the current national standards. Ventilation ducts are classified according to materials: generally: welded air ducts (generally thick steel plates), galvanized steel (white iron) air ducts, fabric air duct board ventilation ducts, glass fiber reinforced plastic anti-corrosion ventilation ducts, plastic ventilation ducts, polymer material ventilation ducts, color Rigid sandwich chocolate thermal insulation board ventilation duct, double-sided aluminum platinum thermal insulation ventilation duct, single-sided color steel thermal insulation ventilation duct, tape-coated ventilation duct (such as mining hair dryer), mining plastic ventilation duct, etc.; According to the main purposes, the pipes are generally divided into: purification equipment to the air pipe, household central air conditioning ventilation pipe, industrial production air supply and exhaust system ventilation pipe, environmental protection system software suction and exhaust pipe, mining coal seam air pipe, mining coating tape The production and installation of air ducts for ventilation ducts such as hair dryers, commonly used panels, aluminum profiles and other key raw materials for finished products, should meet the requirements of the design plan and the national implementation standards for relevant commodities, and use the original factory inspection to prove that the raw materials are admitted. The project acceptance shall be carried out in accordance with the relevant specifications of the current national standards. Ventilation duct, air duct fabrication and installation of commonly used panels, aluminum profiles and other key finished product raw materials should meet the requirements of the design plan and the national implementation standards of the relevant products, and use the original factory inspection to prove that the raw materials should be used when entering the site. Project acceptance shall be carried out in accordance with the relevant specifications of the current national standards. Ventilation ducts are divided according to fabric duct manual air valve manufacturers: generally: thick steel plate air duct (generally thick steel plate), galvanized steel plate (white iron) air duct, fabric air duct air duct, glass fiber reinforced plastic anti-corrosion air duct, plastic air duct, high Molecular material ventilation pipe, color steel sandwich chocolate insulation board ventilation pipe, double-sided aluminum platinum insulation ventilation pipe, single-sided color steel insulation ventilation pipe, tape-coated ventilation pipe (such as mining hair dryer), mining Plastic ventilation pipes, etc. Ventilation pipes are generally classified according to their main purposes: purification equipment to air pipes, household central air conditioning ventilation pipes, industrial production air supply and exhaust system ventilation pipes, environmental protection system software suction and exhaust pipes, mining coal seam extraction Trachea, mining tape-coated hair dryer, etc.; Ventilation ducts are generally divided into: annular, rectangular frame, spiral, etc.;
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