... . Wall thickness can be max 100mm now.-,One new productionline for seamless Rectangular steel pipeCertificates: API ISO & KRMaterials: -,carbon ... 12Cr1MoV, 15CrMo, 37Mn5, 30CrMnSi, 27SiMn. -,for pipeline: API 5L GR.B, X42, X52, X60, X70. -,for construction: high thickness of ST44, ST52 ... business scope. We deeply hope there is a channce for us to establish business-relationship with you in future. ...