Square Welded Tubes

Features:1) Types: purification vent-pipes2) Sub-types: screw vent-pipes, circular vent-pipes, stainless steel welded     tubes, square welded tubes3) Diameter: 80 - 1,000mmVent-pipes features:1) Main types: heating and cooling air condition vent-pipes and purification     vent-pipes2) Sub-types:     a) Heating and cooling vent-pipes:         i) Single thickness screw vent-pipes        ii) Double thickness screw vent-pipes        iii) Super screw vent-pipes and elliptical screw vent-pipes    b) Purification vent-pipes:         i) Screw vent-pipes        ii) Circular vent-pipes        iii) Stainless steel welded tubes        iv) Square welded tubes3) Diameters:     a) Heating and cooling vent-pipes: 100 - 2,500mm    b) Purification vent-pipes: 80 - 1,000mm4) Heating and cooling vent-pipes are used for buildings, gymnasiums and     aerodromes5) Purification vent-pipes are used for many industries like wood works,     foodstuff, tobacco chemical, paper making, metallurgy, foundry and cement