... 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, ... X52, X60, X70.-,for construction: high thickness of ST44, ST52.-,for mechanical ...