... 309 polished,annealing. stainless steel pipe 309 1.Sizes:Diameter:6-610mm Wall Thickness:0.5-60mmO.D:3/8",1 ... /2",3/4",1",1 1/4",1 1/2",2",2 1/2",3 ... ",3 1/2",4",5",6",8",10",12",14",16",18"W.T:Schedule ... mechanical polish;3. Technical: cold rolled,cold drawn,hot rolled.4. Chemical and Physical characteristic: durable, corrosion resistant and high-temperature ...