Abbreviations of Flange and Valve

Slip on flange(SF)
Butt weld flange(BWF)
Female and male flange(MFM)
Welding neck flange(NF)
Flange cover(FC)
Blind flange(BF)
Full Face(FF)
Raised Face(RF)

Ring Joint Face(RJ)
Socket Raised Face Flange(SRFF) 
Galvanized threaded flange
Butterfly valve flange
Slotted flanges
Globe Valve(GV)
Ball Valve(BV)
Butterfly Valve(BV)
Check Valve(CV)

Connection:
Threaded Th
Weld Neck WN
Slip-On SO
Plate PL
Sock welded SW
Pipe Joint / Stub End PJ/SE
Pipe Joint / Plate Ring PJ/PR
Integrated Flange IF
Blind Flange BF

Seal Way:
Raised Face RF
Male and Female MFM
Tongue and Groove TG
Flat Face FF
Ring Joint RJ