What is the inside of the flange?
Flange flanges or flanges. The flange is the part of the pipe that is connected to the pipe and is used for the connection between the end of the pipe. Also useful for the flange of the equipment import and export, for the connection between two devices, such as reducer flanges. Flanged or flanged joint is a removable connection between a set of flanges, gaskets and bolts. The pipe flanged flanged is a fitting flange for the piping device, which is used to refer to the equipment's import and export flanges. There are holes in the flanges, and bolts make two flanges. The flange is sealed with gasket. Flange threaded connection (thread connection) flange, welding flange and clamp flange. The flanges are used in pairs, and the low pressure pipe can be used with wire flanges, and the welding flange is used for more than four kilograms of pressure. Between two flanges, add the sealing pad and tighten the bolt. The flange thickness of different pressure is different, and the bolts they use are different. The pump and valve are also made of the corresponding flanges, also known as flanges, when connected to the pipe. Around where there are two surfaces using bolt connection closed connection parts are generally referred to as the flange at the same time, such as ventilation pipe connections, this kind of parts can be called the flange parts.
Nominal diameter is all pipeline fittings in the piping system with the size of the digital representation, nominal diameter is a convenient rounded number for reference, and machining dimension is not only strict relationship. The nominal size of the "DN" is followed by a digital marker. In order to unify the dimension of the connection size, use the nominal diameter (also known as the nominal aperture and nominal size). For example, welded steel tube is divided into thin walled steel pipe, plain steel tube and thick steel tube. Its nominal diameter is not an outside diameter or an inner diameter, but is a nominal size that is similar to the diameter of an ordinary pipe. Each nominal diameter corresponds to an outside diameter, which varies according to thickness. The nominal diameter can be expressed in mm, also in English.
Flanged inner diameter is the aperture of the middle hole of the flange, which is equal to flange diameter minus flange thickness. The nominal diameter is close to the inner diameter but not the inner diameter, the outside diameter is not necessary to the inner diameter, the specific dimensions need to be measured.
