O fabricação processo de plano solda flange é descrito como segue:

The manufacturing process of flat welding flanges. The production process is divided into pure forging, flat welding and butt welding flange artificial wool forging (the next step), flat welding flange steel plate, centrifugal casting and casting flange. The manufacturing process of flat-welded flanges is mainly introduced above. Flat-welded flanges are easier to align in the welding assembly of flat-welded flanges, and they are also inexpensive and have been widely used.The flat welding flange is connected with the pipeline by inserting the pipeline into the flange hole to the proper position. Flat welding flanges are also called flat plates, or lap welding flanges. The flat welding flange is connected to the pipeline, and the pipeline is inserted into the flange hole to a suitable position, and then lap welding is performed. The flat welding flange is suitable for low pressure, low pressure fluctuation, oscillation and vibration piping system.

Therefore, the leak repair of the necked flange must be orderly and appropriate, and it is necessary to use third-party tools, such as local fixtures.