Reducing Weld Neck Flange

Butt welding flange is a kind of pipe fittings. Butt welding flange, also known as split flange, refers to the flange with neck and round pipe transition and butt welding connection with the pipe. Flanges are components that connect pipes to each other and are connected to the ends of pipes. There are holes in the flange, and the bolts make the two flanges closely connected. Butt welding flanges and their gaskets and fasteners are collectively referred to as flange joints. Flange joint is an indispensable part of equipment and equipment components, and also an indispensable part of pipeline design, pipe fittings and valves.

Application scope of butt welding flange

It has corresponding rigidity and elasticity requirements, is not easy to deform, has good sealing performance, and is widely used. Reasonable butt welding thinning transition. The distance between the joint and the joint is large, and the joint has no temperature deformation after welding. The complex bell structure is adopted, which is suitable for pipes with large pressure or temperature fluctuations or high temperature, high pressure and low temperature pipes. It is generally used to connect pipes and valves with PN greater than 2.5MPa; It is also used in pipelines for transporting expensive flammable and explosive media.

Use of butt welding flange

Flanges are mainly used for pipe connections. The pipes to be connected shall be installed with various flanges. Threaded connection flanges can be used for low-pressure pipes, and butt welding flanges can be used for pressures above 4 kg. Add gaskets between the two flanges and fasten them with bolts. Different bolts used mainly depend on the thickness of flanges under different pressures. When pumps and valves are connected with pipelines, the components of these equipment are also made into corresponding flange shapes. Also called flange connection. All connecting parts bolted and closed outside the two planes are generally called "flanges". For example, the connection of a ventilation duct can be called a "flange part". For example, the connection between the flange and the water pump is difficult to call the water pump a "flange part", because this connection is only a part of the equipment. Smaller parts such as valves can be called "flange parts".

Butt welding flanges shall be marked according to the nominal diameter, nominal pressure, sealing surface form code, designated steel pipe series code (designated metric pipe code is "series 2", unspecified British pipe) and standard number.

Butt welding flanges have different production specifications in use and production. According to the corresponding specifications, the practical application value and effect of butt welding flange can be guaranteed. Production and performance specifications of butt welding flanges: national standards, American standards, Japanese standards, German standards and Italian standards. Specifications of Ministry of chemical industry, Ministry of machinery and pressure vessels. Large scale application of high pressure butt welding flange: boiler, pressure vessel, petroleum, chemical industry, shipbuilding, pharmaceutical, metallurgy, machinery, food and other industries.

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