ERW Steel Pipe Crude oil pipelines, Natural gas pipelines, Water supply lines, Foundation piles, Industrial pipeline networks, ERW Steel PipeOutside diameter: 21.3 to 610mm (1/2-24 inch)Standard: API 5L, API 5CT,BS1387-1985,ASTM A-53,GB/T3091-2001Grade: A, B, X42, X46, X52, X56, X60, X65 X70 PSL1 PSL2Thickness: SCH 20 to SCH 140mm (2-14 inch)Packing: Labeled and bundled together with steel ...