http://www.tsscaffold.com/stee....l-pipes/structural-s Steel Pipe There are seamless and welded steel structural pipe,which are widely used as roof frames, purlins, trusses, rigid frames, wall frames, keels, roof panels, wall panels, floor slabs, doors and windows, containers, pipelines, cofferdam, steel piles, breakwaters . Topstar Scaffolding company supplies galvanized steel structural pipes include square pipe,rectangular pipe and round pipe.There are cold formed and hot finished type for welded structural pipes. 聽聽 Product Specification Property of Galvanized Steel Structural Pipe OD10*10mm-1200*1200mm Thickness