... ,KR Approved 3.OD:30-457MM WT:2-80MM seamless steel pipe we have got three completer production line as: -,Cold drawn ... now.-,One new productionline for seamless Rectangular steel pipeCertificates: API ISO & KRMaterials: -,carbon steel pipe for liquid: ASTM A106/A53 GR.B ... , ST37, ST44. -,alloy pipe: P110, A335-P12, A335-P11,12Cr1MoV, 15CrMo, 37Mn5, 30CrMnSi, 27SiMn. -,for pipeline: API 5L GR.B, X42 ...