... :such as 201, 301 ,304,304L,316,316L,321 and so on. 3. Standard: JIS,BS,DIN.ANSI/ASTM ,NF,API ... standard, 4. Size:1/2"-40" 5. Type:Slip on flanges,Plate flanges, Blind flanges, Spectacle flanges,Lap joint flanges ... 10 16 25 40 64 and 160,5K-40K and so on . 7. Sealing surface : FF ,RF, LJ, FM ,R. ... T.J ,R.J ,MALE ,FEMALE and so on . 8. Used for : petroleum,chemical,power,gas,water,linepipe, heat ...