Add a convex reinforcement ditches every 300mm to increase strength.

The flange is directly rolled and rolled in the tube body, which saves the cost.

The site combination is fast and the wage cost is reduced.

The duct is connected by Pittsburg or Shishi.

Saves manpower, the construction is convenient.

Mechanized production of computer, strict quality control, prompt delivery.

The use of the whole bundle coil steel coil automation production, saving materials.

Applicable to high and low pressure duct and general air-conditioning, ventilation and exhaust pipe.

Material：

Galvanized steel Plate (g)

Stainless steel plate (s)

Size：

Length：

TDF28 Type: 1450mm (select 5 ' Steel coil)

TDF35 Type: 1430mm (select 5 ' Steel coil)

Caliber: can be customized according to customer needs.

Thickness: 26# ~ $number