ERW Steel Pipe Crude oil pipelines, Natural gas pipelines, Water supply lines, Foundation piles, ... 21.3 to 610mm (1/2-24 inch)Standard: API 5L, API 5CT,BS1387-1985,ASTM A-53,GB/T3091-2001Grade: A ... with plastic cap.ERW Steel Pipe Application: Line pipe in oil and sewage transportation, in low pressure liquid and gas ... fields.Your kind inquiry will be answered promptly! BRDSNana oil Steel Pipe*