1. seamless steel pipe 2.Certificate:ISO9001:2008, API ,KR Approved 3.OD:30-457MM WT:2-80MM Size: ... can be max 100mm now.-,One new productionline for seamless Rectangular steel pipeCertificates:API ISO & KRMaterials:-,carbon steel pipe for liquid: ASTM ... ,12Cr1MoV, 15CrMo, 37Mn5, 30CrMnSi, 27SiMn.-,for pipeline: API 5L GR.B, X42, X52, X60, X70.-,for construction: high thickness of ST44, ST52.-,for ...