The air duct system can be used to deal with the elimination of flammable and nonflammable corrosive gases without the need for additional sprinkler fire-extinguishing devices.

The crd-form is made of highly corrosion-resistant ETFE/ECTFE coating materials and sturdy stainless steel. It has a high impact resistance, corrosion resistance, chemical resistance and can be applied to temperature -150°f ~ 300°f ( -66°c~+149°c) between.

The Crd-form duct has been certified by the U.S. Factory Mutual 4922 and complies with ASTM E84 requirements for smoke and flame. Therefore, the Crd-form department by the dust-free room to provide users with the most reassuring and most economical duct.