steel tube 1.Material from Jiuli; 2.ASTM standard; 3.Good quality remarks from customer; 4.Steel tube. steel tube,stainless steel tubes,stainless tubesAstm 304, Astm304L, Astm321, Astm316, Astm316L The manufacturing standards we use are:Astma269, Astma213, Astma 312, Astma213,Astma511 etc Ranges: Outdiameter: 3--130mm, Wall thickness: 0.5--15mmStainless steel tubes. Stainless Steel Tube