... , and electricity; 2)We have engineering team for pipeline system building A: Size Range: Round pipe diameter: 4mm-200mm, thickness: 0.5 ... : st35,st35.8,st37,st37.4,st45,st52,SAE,grade A,B etc.E: Conforms to international standards, like:Astm A106 ... countries have started to select our products, which have won a good reputation both at home and abroad.We are sure ...