Steel Flanges used in Butt Welding

Butt welding flange is also called high neck flange, it is different from flat welding flange in that there is a long and inclined high neck from the flange and pipe welding to the flange, the wall thickness of this section of high neck gradually transition to the wall thickness along the height direction, improve the stress discontinuity, thus increasing the strength of the flange.

Steel Flanges Butt Welding

Butt welding flange is mainly used in harsh working conditions, such as pipe thermal expansion or other loads and the flange is subjected to large stress or stress changes repeatedly occasions, pressure, temperature fluctuations of the pipeline or high temperature, high pressure and sub-zero low temperature pipeline. Butt welding flange is not easy to deformation, seal well, widely used, nominal pressure PN1.0MPa~PN25.0MPa.

Butt welding flange according to the type of sealing surface can be divided into: plane butt welding flange, protruded face welding flange, concave and convex face welding flange, tenon face welding flange, ring joint face butt welding flange.

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