... We have engineering team for pipeline system building A: Size Range: Round pipe diameter: 4mm-200mm, thickness: 0.5-10mmB ... , blank, bright and galvanized C: Length of each pipe: 500mm-16,000mm D: Steel grade: st35,st35. ... 8,st37,st37.4,st45,st52,SAE,grade A,B etc.E: Conforms to international standards, like ... started to select our products, which have won a good reputation both at home and abroad.We ...