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large diameter flange large caliber flange
The large diameter flat welded flange connection is convenient to use, can withstand greater pressure, and plays an important role and value in use. In industrial pipelines, large flange connections are widely used and have different meanings and functions in industry.
Large-caliber flat welded flange refers to the flange that exceeds the size specified by the relevant state departments, generally refers to the flange of DN2000 or more size, and the production of such flanges should be made by the construction party to provide drawings for production.
The common large diameter flanges are flat welded flanges and butt welded flanges. The structure and scope of use of flat welding large diameter flange and butt welding large diameter flange are different, and the characteristics and advantages can be displayed will be different, so it is necessary to use for different ranges to ensure that the flange plays an important role.
Large diameter flange introduction
Large diameter flange is not easy to deform, sealed well, widely used, suitable for pressure or temperature fluctuations of the pipeline or high temperature, high pressure and low temperature pipelines, the advantage is that the price is relatively cheap, nominal pressure does not exceed 2.5MPa.
Characteristics of large diameter flange: anti-corrosion, smooth surface, acid, alkali and high temperature resistance, reasonable price, good texture performance.
Production material and process: 201, 304, 321, 304L, 316L, 310S, 2205, 904L and other carbon steel, stainless steel, alloy steel.
Large diameter flange production process: forging, casting, cutting, rolling these four kinds.
Pressure class description of large diameter flanges: Operating pressures are 75, 150, 300, 400, 600 and 900 lb.
The steel of large-diameter flat welded flange is poor, and it is suitable for occasions where the pressure p≤4MPa; Butt welded flange, also known as high neck flange, has greater rigidity and is suitable for occasions with high pressure and temperature. There are three types of flange sealing surface: flat sealing surface, suitable for occasions where the pressure is not high and the medium is non-toxic; Concave and convex sealing surface, suitable for slightly higher pressure occasions; Groove sealing surface, suitable for flammable, explosive, toxic media and high pressure occasions. Different properties of flanged pipe fittings have good product performance in different fields, and the effectiveness of different occasions and Spaces will be different.
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