... 2,etc.EndPlain end, beveled, cut square, grooved, threaded and coupling, etc.SurfaceBare, varnished, black lacquer, Bitumen Coating, zinc coating, ... ; can be packed as customers’ special requirementsApplication- line pipe for use in pipeline transportation systems in the petroleum and ... steel tubes- suitable for welding or for screwing to BS21 pipe threads, loose steel tubes, scaffolds- used for the ...