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1 Production technology: Hot-rolled 2 Standards: GB/T8162/8163/3087/5310, ASME B36 10, ASTM A106/A53, API 5L/5CT, DIN2448/1629 3 Specification range: OD: 3''-24'' (73mm-610mm) WT: SCH10-SCHXXS 4 ...