High quality carbon steel forged flange 1. Types:SO,WN,PL,BL,SW 2. Standard :ANSI,ASME,ASTM 3. Size:3/8"-96" High quality carbon ... steel forged flange Manufacturer 1. Types:SO,WN,PL,BL,SW 2 ... .25Mpa-PN2.5Mpa 5. Standard:a) ISO9000-2008b) Customers' drawings for special use 6. Types we can supply: WN, SO, BL ...