... Stainless Steel Tubes & Pipes 2205/UNS S31803 1) Grade: TP304/TP304L/TP316L/TP321/201/202 ,SS904L,S32750,2205,Duplex ,Titanium,Titanium alloy and ... DNV, LR,GL,ABS, NK, KR, CCS. Stainless steel tube: Features:STANDARDS: AISI,ASTM,DIN,JIS,GB ... (BY TRAIN)------------------------------------------------------------------------------------- Super Duplex Seamless Stainless Steel Tubes & Pipes 2205/UNS S31803