High quality carbon steel forged flange 1. Types:SO,WN,PL,BL, ... 2. Standard :ANSI,ASME,ASTM 3. Size:3/8"-96" High quality carbon steel forged flange Manufacturer 1. Types:SO,WN,PL ... 6. Types we can supply: WN, SO, BL, plate, thread, socket and other special shapes 7. Painting: Black,oil,zinic 8 ...