Hot-dip galvanized spiral duct is a ventilation duct designed for harsh environments, especially in highly corrosive environments.

Good fire resistance is also one of the reasons why galvanized air ducts are widely used in engineering.

In actual construction, full welding can be done, and it should not be a right-angle flange to ensure that it is not affected by the thermal expansion and contraction of the duct, while also strengthening the duct.

The common methods for welding stainless steel spiral ducts are manual welding, metal inert gas shielded welding and tungsten inert gas shielded welding.

Spiral duct is a thin-walled tube with spiral seams made of metal strips. It is round, welded, airtight and watertight.