1.we produce seamless steel pipe 2.size:48-219*4.5-45mm 3.ISO 9000 approved 4.Market:south/east Asia,Mid-east,South Americ 1.we produce seamless steel pipe 2.size:48-219*4.5-45mm 3.ISO 9000 approved 4.Market:south/east Asia,Mid-east,South Americaseamless steel pipeMaterial J55 K55 N80 L80 P110.etcStandard ASTM JISUsage conveying oil gas ,oil pipe line,pipe material collar,oil nature gas,Packing ...