Duplex Seamless SS Steel Tube/Pipe UNS 31803/1.4539 1.OD 6-630mm 2.WT 0.89-24mm 3.Dup Duplex Seamless SS Steel Tube/Pipe UNS 31803/1.4539 1) Grade: TP304/TP304L/TP316L/TP321/201/202 ,SS904L,S32750,2205,Duplex ,Titanium,Titanium alloy and others . 2) Standards: ASTM A312/A269/A213/SAE 789/ SAE 7903) O.D.: 6-630(NPS: 1/8"-24")4) Thickness: 0.89-40mm (SCH 5S-160S according to ANSI B36.10;36.19)5) ...