... 5-50mm 3)Length:2-12m 4)Certificate:ISO round stainless welded steel pipe 1.Material: 201,202,321,301,302,304,321H ... 409L,etc.2) Applied field:Stainless steel welded pipes for food industry,supply and drainage water pipe,mast and fence,sewerage,architecture, ... machinery as well as liquid and gas transport,vehicle vent-pipe,construction decoration,traffic equipments,etc3)Specifications:(or according to ...