... BS1387-1985,ASTM A-53,GB/T3091-2001Grade: A, B, X42, X46, X52, X56, X60, X65 X70 ... (2-14 inch)Packing: Labeled and bundled together with steel stripType of ERW Steel Pipe finish: Black ... Application: Line pipe in oil and sewage transportation, in low pressure liquid and gas transportation, good structure steel ... pipes, used in building and bridge fields.Your kind inquiry will be ...