Customized with neck butt weld flat welded carbon steel stainless steel flange

Butt weld flange with neck is a type of flange that is butt welded with the pipeline through the taper neck structure, which adopts double-sided welding process, has higher connection strength and stress resistance, and is suitable for medium and high pressure pipeline systems (nominal pressure 1.0-25.0MPa), especially suitable for high temperature and high pressure, low temperature and severe temperature and pressure fluctuations 12. Main features Structural design: It is forged by flange and tapered neck as a whole, and the slope of the outer slope of the neck is ≤7°. Performance advantages: The fully penetrated weld seam forms a continuous stress distribution between the flange neck and the pipe wall, and the fatigue strength is 1.5 times that of flat welded flange1. The optimized thinning transition structure reduces the residual stress of the weld by 30%-40% and avoids leakage due to thermal deformation of the sealing surface1.