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Welding Neck Flanges
- Commodity name： Welding Neck Flanges
- Product Description
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Neck butt-welded flange is a flange with a conical neck, which is usually connected by butt welding to the cylinder or pipe. It belongs to an integral flange. Due to the transition structure of the cone neck and the butt welding connection, the strength and stiffness of the flange are enhanced, and the sealing performance is better than that of the flat welded flange.
Structural features
Features of neck butt-welded flange include:
● Conical neck design: There is a long and inclined high neck at the welding of the flange and the pipe, and the wall thickness gradually transitions to the thickness of the pipe wall in the height direction, which helps to improve the discontinuity of stress and the strength of the flange.
● Sealing performance: Due to the transition structure of the cone neck and butt welding connection, the sealing performance of the neck butt welding flange with neck is better than that of the flat welding flange.
● Applicable scenarios: Suitable for high-voltage, high-temperature, flammable and explosive media pipelines in chemical, petroleum, electricity and other fields.
Made process
The manufacturing process of neck butt-weld flanges usually involves the following steps:
● Forging: The blank is forged into a square blank, and then cold forms an arc cross-section, annealing and stress-free heat treatment.
● Processing: The entire circle is processed on the vertical body into a designed shape and size.● Weld: Weld several arc-shaped groups into complete special-shaped neck butt-weld flanges and weld them with pressure vessels.
● Testing: Welding inspection is required after welding to ensure it is.Application field
Neck butt-welded flanges are widely used in large containers in petroleum, chemical and other fields, and are suitable for medium and high-pressure pipelines and equipment, such as instruments, valves, pumps, etc. Due to its high strength and good sealing properties, it is especially suitable for situations where the working conditions are harsh, such as when the pipe heat or other loads cause the flange to be under high stress or the stress changes are repeated.
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