Steel flange is very common term in industry. Generally,flange is a cast iron which is used to connect two pipe or work as a joints.
Moreover, these are designed to the specific pressure ratings such as 150lb, 300lb, 400lb, 600lb, 900lb, 1500lb and 2500lb. The most used flange types are Steel Weld flange( it is known as “หน้าแปลนเชื่อมเหล็ก“ in the Thai language) , Slip On, Socket Weld, Lap Joint, Threaded and Blind flange. Each flange material is considered by its application priority, this is due to the structural integrity of the application that the flange will be used on.
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Welding Neck Steel Flanges : They are easy to recognize at the long tapered hub, that goes gradually over to the wall thickness from a pipe or fitting. It is expensive because of its long neck, but more suitable for high stress applications because the neck provides important reinforcement to the flange. The bore of the flange matches the bore of the pipe, reducing turbulence and erosion.
SOCKET WELD FLANGES: This is similar to a slip-on flange in outline, but the bore is counter-bored to accept pipe. The diameter of the remaining bore is the same as the inside diameter of the pipe. The flange is attached to the pipe by a fillet weld around the hub of the flange.
BLIND FLANGES: This is a flange without a bore. Also called a blanking flange, it is used to fix or seal an end of a piping framework or shut off a piping system or vessel opening.
However, custom shapes and sizes are manufactured by a large range of manufacturers, not only the popular ranges. Various flanges can include machining details such as gasket surfaces, facing details, non-standard drilling, bevel and radius edges, o-ring grooves and raised or recessed faces. Although, provide an easy access for cleaning, inspection or modification