What is the maximum pressure of the flanges RF and RTJ?
General toxic medium, are not recommended to use an ordinary plane flange and flange flange should choose picture, concave and convex surfaces or the sealing performance is better than the. ??For toxic media, as long as it is not extremely dangerous, the pressure grade <=1.6MPa, you can generally use the convex surface RF flange, 2.5MPa start, generally need to use concave convex flange. For extremely hazardous media, recessed flanges shall be used.
The use of with concave convex surface with tongue and groove face flange is basically the same. Ring groove sealing surface (RTJ) is mainly used in high temperature and high pressure or both high working conditions. In American Standard flange, commonly used in Class 600Lb (part) and 900Lb, 1500Lb, 2500Lb grade pressure. In the German standard and national standard, often used in PNl0.0, PN16.0, PN25.0, PN32.0, PN42.0MPa flanges.
RF is generally maximum 15.0MPa, RTJ maximum 42.0MPa.The concave convex flange is usually used in the German standard GB and PN4.0, PN6.4MPa level, is mainly decided by the pressure rating, concave convex flange sealing convex flange ordinary (RF) better, but not easy to replace the gasket.
