... , shc20, std sch40, sch 80, sch160, schxxs Coating:black paint,hot galvanized,cold galvanized, rust-proof oil Packing ... anti-rust varnish,anti-rust oil,hot galvanized,3PE coating, epoxy coating.Radius of Curvature1D~6D WarrantyOne yearRemark Material: Stainless ... a fine solution regarding abrasion resistance against solid, powder and sludge mediums in such sectors including electricity generation ...