How to select forged flange

　　How to select the flange is mainly reflected in the selection of flange joint surface, because there are many flange joint methods, including welding flange, screw flange, etc. the sealing of welding flange is good, and it can withstand the fluctuation of high temperature and high pressure repeated bending. Large diameter flange links are the most common among them. Here I would like to share with you the ways and specific features of large diameter flange links:

　　First of all, large diameter flange links mainly include: large diameter flat welding flange and large diameter stainless steel flange. The wear of large flange has always been an important factor affecting safe and civilized production. With the continuous development of science and technology, materials are constantly innovated, Among them, alumina ceramic lining has become one of the most widely used wear-resistant materials because of its high wear resistance, high hardness, oxidation resistance, good corrosion resistance and high low temperature strength, Compared with carbon steel and manganese steel pipe, the wear resistance of the ceramic composite pipe formed by this method is improved to a certain extent. However, due to the low reaction temperature and short reaction time, the reduced alumina still stays in the low temperature phase β - Al2O3, and can not be converted into high temperature phase α - Al2O3

　　General flange large diameter connection, diameter of 7m, simple structure, convenient processing, and easy to carry out anti-corrosion. The other is the connection of threaded flange, which has better sealing effect than the former. It is determined that the structure is disordered and it is difficult to replace the gasket squeezed in the groove.

　　The determination of flange nominal pressure is related to the maximum operating pressure, operating temperature and flange data. Because the mechanical performance of 16MnR at 200 ℃ is taken as the benchmark when drawing up the flange size series and calculating the flange thickness. Therefore, the maximum allowable operating pressure of the flange size determined by the rule on this basis at 200 ℃ is considered to be the nominal pressure of the flange with this size.