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Pipe Flanges (1) |
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Pipe Flanges general A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. It also provides easy access for cleaning, inspection or modification .. |
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Pressure Classes of Flanges Forged steel flanges ASME B16.5 are made in seven primary Pressure Classes.. 150, 300, 400, 600, 900, 1500 and 2500 .. |
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Types of Flanges The most used flange types are.. Welding Neck, Slip On, Socket Weld, Lap Joint, Threaded and Blind flange .. |
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Types of Flange faces Different types of flange faces are used as the contact surfaces to seat the sealing gasket material .. |
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Flange Face Finish ASME B16.5 code requires that the flange face (raised face and flat face) has a specific roughness to ensure that this surface be compatible with the gasket and provide a high quality seal .. |
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Marking Standards and Requirements The ASME B31.3 Code requires random examination of materials and components to ensure conformance to listed specifications and standards .. |
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Bolt Hole Orientation During the prefab of a flange to for example a elbow, the position of the bolt holes are of particular importance. Maybe you have ever seen the following on a drawing .. |
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Flange Materials
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ASTM Grades of Flanges ASTM standards define the specific manufacturing process of the material and determine the exact chemical composition of pipes, fittings and flanges, through .. |
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ASTM A105 Flange Material ASTM A105 covers wrought carbon steel piping components for use in ambient and elevated temperatures in pressurized systems .. |
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ASTM A350 Flange Material ASTM A350 covers various grades of carbon and low-alloy steels, forged or ring-rolled flanges, forged fittings and valves primarily intended for use at lower temperatures .. |
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Tightening torque
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Gaskets and Bolts for flanged connections To realize a leak-free flange connection gaskets are essential and to connect two flanges with each other, also bolts are necessary .. |
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Torque Tightening With Torque Tightening (the application of preload to a fastener by the turning of the fastener's nut) the correct bolt tension can be realized .. |
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Bolt Tensioning ensioning is the direct axial stretching of the bolt to achieve preload. Inaccuracies created through friction are eliminated .. |
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Flange Bolting Torque Tables Torque tables are built on specific assumptions regarding bolt and nut factor. Before using a given torque table .. |
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