... , 316L, 321, S31803 Certification: BV, ABS, GL, PED, ISO9001 Kind :WN, SO, PL, SW, LJ, BL Slip On Flanges - ANSI B16 ... .5 Stainless Steel 304L,316L ect. Standard Chinese Flange Used in Pipeline,Transport ISO9001-2008. Stainless Steel Flanges SpecificationASTM ... , 900, 1200, 1500,2500.Size1/4" to 48" Stainless Steel WN Flange