Titanium Flange sealing face should be Z-optimized according to the different working conditions, media, pressure, specifications, temperature, etc., so there are different requirements for the flange.
1, FF-full flat sealing face (Flat Face Full Face), from the English better understand this type: sealing surface surface for the full flat. It is suitable for occasions where the pressure is not high and the medium is non-toxic.
2, RF - Raised Face sealing face (Raised Face), this type of sealing face is one of these types of use Z for a wide range of common, the height of the protruding part of the international and European system and the domestic standards are fixed height, but the American Standard flange should be noted that the height of the high pressure will increase the height of the sealing face, the use of gaskets are also a variety of types.
Applicable to the gasket of the flange of the protruding sealing surface are non-metallic flat gaskets; clad gaskets; metal clad gaskets; wrapped gaskets (including with outer ring or with inner and outer rings) and so on.
3、M/FM-Convex sealing face (Male Face and Female Face) These two types of sealing faces are matched and need to be used in matching as required, which is easy to center during installation and also prevents the gasket from being extruded. They are suitable for higher pressure applications.
Concave-convex face sealing surface applicable sealing gaskets are: non-metallic flat gaskets, wrapped gaskets; metal wrapped gaskets; basic or with an inner ring type winding gaskets, and so on.
4、T/G-Tongue and groove joint sealing face (Tongue Face and Groove Face) is almost the same as concave-convex face, which consists of a tongue and groove face matched with a groove face, and the sealing is narrower. Due to the position of the gasket in the annular groove does not produce direct contact with the medium in the pipe, to a certain extent, to reduce the fluid medium on its loss, so T / G - Tongue and groove connection sealing face can be used for high-pressure, flammable and explosive, toxic media, such as sealing the requirements of the more stringent occasions.
Tongue and groove surface sealing surface applicable gaskets are: metal and non-metallic flat gaskets, metal wrapped gaskets and basic winding gaskets.
5、RTJ(RJ)-Ring Joint Face also belongs to narrow flange, the sealing face is trapezoidal groove face, ring joint face flange is different from the last two kinds, do not need to pair use. Just use a different gasket, need octagonal metal ring gasket or oval metal ring gasket to seal.
As the metal ring gasket can be based on the inherent characteristics of various metals, thus this sealing surface has good sealing performance, which is more superior than the concave-convex surface flanges and is suitable for high temperature and high pressure working conditions.
