The sealing surface of titanium flange should be selected according to different conditions, such as working condition, medium, pressure, specification and temperature, so the requirements of the flange are also different.

1, FF- Flat Face Full Face, from English better understand this type: the surface of the sealing surface is completely Flat. It is suitable for low pressure, non-toxic medium occasions.

2, the RF - tu Face sealing surface (Raised Face), a type of seal Face is that several types of Z is widely used, a kind of common, the height of the prominent part in the international system with Europe and the domestic standards are based on a fixed height, but the height of the high pressure should be paid attention to in the American standard flange can increase the height of the sealing surface, there are different types of gasket used also.

Gaskets suitable for surface sealing flange have non-metallic flat gaskets; Coated gasket; Metal gasket; Winding gasket (including outer ring or outer ring), etc.

3. The two types of M/ FM-male Face and Female Face are matched and need to be used as required. It is easy to align during installation and can prevent gaskets from being squeezed out. Suitable for high pressure situations.

Concave-convex surface sealing surface suitable for sealing gaskets are: non-metallic flat pad, covering pad; Metal gasket; Basic type or winding gasket with inner ring, etc.

4, T/ G-tongue Face and Groove Face are similar to concave and convex surface, consisting of a mortise surface and a Groove surface, and the seal is narrower. Because the gasket position in the annular groove does not directly contact with the medium in the tube, reducing the loss of the fluid medium to a certain extent, so T/G- tenon groove connection sealing surface can be used for high pressure, flammable and explosive, toxic media and other occasions of strict sealing requirements.

Suitable gaskets for tenon groove surface sealing surface are: metal and non-metal flat gasket, metal wrap gasket and basic type winding gasket.

5. RTJ(RJ) -ring Joint Face also belongs to narrow Face flange. The sealing Face is trapezoidal groove surface. Only the gaskets used are different, requiring octagonal metal ring gaskets or oval metal ring gaskets to seal.

Because the metal ring gasket can be based on the inherent characteristics of various metals, so the sealing surface of the sealing performance is better than the concave and convex flange, suitable for high temperature and high pressure conditions.