Common types of titanium flange:
PL-----plate flat welded titanium flange;
SO ------titanium flange with neck flat welding;
WN------ titanium flange with neck butt welding;
IF -------integral titanium flange;
SW------ socket welded titanium flange;
TH----- thread titanium flange;
PJ/SE -----butt welding ring loose sleeve titanium flange;
PJ/RJ------ flat welding ring loose sleeve titanium flange;
BL -----titanium flange cover;
BL(S)------ lined titanium flanged cover;
Common types of sealing surface:
RF -----facet;
FM----- concave surface;
M -----convex surface;
MFM----- concave-convex surface;
T -----mortise surface;
G -----groove surface;
TG----- mortise surface
FF----- full plane;
RJ -----ring connection surface.
