Application and storage method of the welding flange
High pressure welding flange is one of the flange products in the market. The general pressure grade of high pressure welding flange is between 0.5mpa and 50mpa. The structural form of high pressure welding welding flange is divided into unit flange, integral flange and insulation flange. According to the shape of flange surface, it can be divided into flange sealing surface: plane, concave surface, concave surface, tenon surface and ring connection surface. The welding flange is reliable in sealing, excellent in performance and beautiful in shape. The welding flange has the advantages of wear resistance, high temperature resistance, corrosion resistance, good abrasion resistance and long service life. Because the unique impulse resistance strength function is significantly improved than other solid wall tubes, its ring stiffness is commensurate with 1.3 times that of the solid wall. Pipe in the rated service temperature and pressure, the service life of more than 50 years, with ultraviolet light protection, radiation prevention, so that the product will never fade. The welding flange cannot be stored for a long time, and should be checked in time. The frequently exposed surface must be kept clean, with dirt removed, and neatly stored in indoor air-drying places, and shall not be stacked or stored in the open air. When using flange ball valves, globe valves, and gate valves, they are only fully open or completely closed and do not allow flow adjustment to avoid corrosion of the sealing surface and accelerated wear. The butt welding flange sealing surface type has a flat surface and a convex surface, a simple flange structure, small volume, light weight, it is compact and reliable. At present, the sealing surface material of the ball valve is widely used in plastic, with good sealing performance. It is also widely used in vacuum systems, easy maintenance, simple ball valve structure, sealing rings are generally effective, easy disassembly and replacement, when completely open or completely closed, the sealing surface of the ball and the valve seat is isolated from the medium.
