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1.Product:seamless steel pipes 2.Nps:1/2"-16" 3.Od:21.3mm-406.4mm 4.W.T:std;xs;xxs;sch40;sch80 5.Standard:gb/t8162-1999; gb/t8163-1999 Din; astm; jis 6.Material: astm a106-b;astm a53-b Astm a210-c;astm 1045 Astm 1020;din ck45 In bundle by steel belt