... 301 ,304,304L,316,316L,321 and so on. 3. Standard: JIS,BS,DIN.ANSI/ASTM ,NF,API ... 7. Sealing surface : FF ,RF, LJ, FM ,R.T.J ,R.J ,MALE ,FEMALE and so on . 8. Used ... --forging--heat treatment--maching--inspection. 11. Mill ceitificate :3.1B 12. Certificate :TUV 13. ISO certificate : ... manufature license : manufacture license of special equipment of the P.R.C. 15. Marking :according to client's requirement ...