standard: ASTM API GB OD :21.3mm-1219.2mm WT:2mm- ... 5.8--18m5.Standard: API 5L/5CT, EN10217, EN10219, ASTM A53, ASTM A2526.Steel grade: GR.A/B, X42, X46, X52, X56, ... , shipbuilding.....13.Package: small sizes in bundled packed by steel strips , and big sizes in loose14.Brand: Huilitong15.Loading port: XINGANG ... .Others: as per costomer's requirement API hot rolled /cold drawn welded carbon steel pipe