Common flange including flat welding flange, butt welding flange, socket welding flange, threaded flange. One of the newest kinds of flange is called anchor flange, anchor flange is a kind of engineering structures. Where less pressure can replace with short tube with thrust ring, or wear casing wall, for buried or lifelong maintenance of fixed pipeline connection, and require pressure is larger, the conventional flange, does not ensure high pressure pipeline safe and reliable work. Utility model is a kind of axisymmetric torus with flange, the flange for symmetrical on both sides of the flange neck, two flange neck ports respectively with that of the pipe welding, embedment anchor pile. Because of the existing technology of bolting together two flanges, cancel the gasket and made into a whole flange, welding way and pipeline connection, and on the flange and the flange body with anchor pile, which can be used in the fixed pipe connection. More suitable for China's 'west to east gas pipeline project' in the pipe system, many process station, line Industrial Valves chamber fixed connection.
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