Stainless Steel Flange ANSI Material: Stainless steel (304ss 316ss,321ss, etc.) Materials: 304, 304L, 306, 306L, 317, 317L, 321 and 904L stainless steel Types: ... WN, BL, PL, SW, SO and RF Relative Standards of Flanges: 1) DIN DIN 2573 PN6 Flange, DIN 2576 PN10 Flange ... BS 4504 600/3 Flange, BS 4504 1000/3 Flange, BS4504 1600/3 flange, BS4504 2500/3 Flange, BS4504 4000/3 Flange DN/NPS: 10A ...