Welded flange means and a tube with a neck of the transition and the flange with the tube butt weld, we have produced welded flanges ASME B16.5, ASME B16.47 welded flange, DIN 2631 welding flange, DIN 2637 welding neck flange, DIN 2632 welding neck flange, DIN 2638 welding neck flange, DIN 2633 welded flange, etc. welded flange for pressure or temperature fluctuations of the pipeline or high-temperature, high pressure and low temperature pipes, but also for transport is expensive, flammable, explosive media pipeline. welded flange distortion, sealing is good, wide range of applications.