1,FDP Series Flange is Cover Flange, which can be matched with CPRF series flange & UDR series flanges.
2,FDM Series Flange is Groove Flange, which can be matched with CPRG series flange & PDR series flanges.
3,FBP Series Flange is Cover Flange, which can be matched with UBR series flange.
4,FBM Series Flange is Groove Flange, which can be matched with PBR series flange.
5,FBE Series Flange is Choke Flange, which can be matched with CBR series flange.
6,The customized flange is welcome. Welcome to ask.