First, what is a looper flange, looper flange used in what place and what pipe? Looper flange is the flange can be active, usually supporting the supply and drainage fittings (telescopic section on the most common), factory manufacturers have two ends of the telescopic section have a flange, and the project directly to the pipeline, Equipment is bolted. Second, the flange is how the pipeline together with the welding in what parts? Many different flanges. Generally use a flat flange, butt flange (long neck flange), looper flanges and so on. Welded flat flange for medium and low pressure, the use of welding, welding on both sides, the welding depth from the flange sealing surface 2-5mm, butt flange welding directly to the flange, flangeless bolt connection without welding. Third, the flange is what does it mean? The flange is a link for connecting the valve to the pipe. The valve is bolted to the pipe when it is connected to the pipe. Therefore, the n ends of the valve with n uniform bolt holes are flanged. 1, flange: Flange is the transliteration of flange, which means flanged things, parts, such parts can be separate, is the flange, it can be combined type, such as one or both ends of the tube with the tube Flange, the flange on the head there are several through-holes, in order to install the screws, and some bearing outer ring with flange, the flange can be perforated, it can be without holes, only for edge positioning. 2, Flange: the valve and pipe or machinery and equipment used in the connection flange, which is commonly known as the flange connection. Fourth, what is the flange? Flange is a disc-shaped parts, the most common in plumbing works, the flanges are used in pairs. In plumbing, flanges are mainly used for pipe connections. In the need to connect the pipe, a variety of installation of a flange, low-pressure pipe can be used to wire flange, 4 kg or more pressure using the welding flange. Apply sealing points between the two flanges and tighten with bolts. Different pressure flanges have different thicknesses and use different bolts. Pumps and valves, in connection with the pipe, these equipment parts of the device, but also made of the corresponding flange shape, also known as the flange connection. Where the two planes in the surrounding use of bolt connection at the same time closed the connection parts, commonly known as "flange", such as the ventilation pipe connection, this type of parts can be called "flange parts." However, this connection is only a part of the equipment, such as flange and pump connection, it is not good to pump called "flange parts." Smaller, such as valves, etc., can be called "flange parts."