Classification and pressure analysis of stainless steel flange

　　Many kinds of stainless steel, stainless steel by chemical composition characteristics of chromium stainless steel and nickel stainless steel is divided into two categories. Usually in microstructure are classified, according to the classification of metallographic organization for: (a) type of austenite stainless steel, iron ferrite (f) stainless steel, austenitic iron ferrite (A-F) type duplex stainless steel, martensite (m) - stainless steel, austenite martensite body (A-M) type duplex stainless steel and precipitation hardening (PH) stainless steel.

　　In the development of stainless steel flange size series, calculate the flange thickness, is to 16MnR at 200 degrees when the mechanical properties for the development of the benchmark. Therefore, the provisions of this standard to determine the flange size, at 200 degrees, the maximum allowable operating pressure on the stainless steel flange is considered to have the size of the flange of the nominal pressure. If the flange welded flange materials made of 16MnR instead of 15MnVR. Then, due to the mechanical properties of 15MnVR than 16MnR, the nominal pressure PN0.6MPa flange, in operation of 200 DEG C, the maximum allowable operating pressure will be higher than the nominal pressure.