... TubeCarbon steels,low-alloy steels,stainless steels,brass,copper,coper-nickel alloys,aluminium bronze,nickel-alloys(Alloy ... 400,etc),bimetal,titanium and others.FinsAluminium/Copper/Steel/Galvanized SteelFIELDS OF APPLICATION*the petroleum,chemical ... :The manufacturing strip is folded to from an L shape and then wound around the base tube. ... atmospheric corrosin or thermal stress. FIN TUBE L TYPE