... engineering team for pipeline system building A: Size Range: Round pipe diameter: 4mm-200mm, thickness: 0.5-10mmB: Surface finish: ... , blank, bright and galvanized C: Length of each pipe: 500mm-16,000mm D: Steel grade: st35,st35.8,st37,st37.4,st45 ... information, top quality products, best price, and efficient services.For all details, please never hesitate to contact us. high precision pipe and tube