AISI 309S Stainless Steel Welded Pipe 1>WT:Sch5S-SchXXS 2>OD:1/2"- ... other 4>Surface:Pickling,Polishing AISI 309S Stainless Steel Welded Pipe CommodityStainless Steel Pipe/TubeDescriptionStainless Steel Seamless Pipe/Tube,Stainless Steel Welded Pipe/TubeStandard ASTM A213,ASTM A312,ASTM A269 ... Series:301,304,304L,TP304,TP304L,309S,310S,316,316L,TP316,317L,321,347 TP321,TP347,321H,347HOut Diameter1/2 ...