The stainless steel weld neck flange is the welding of the same two pipes, that is, the pipe diameter and wall thickness of the interface end are the same as the pipes to be welded. The flat welding flange is a concave table that is slightly larger than the outer diameter of the pipe at the interface, and the pipe is inserted and welded inside. The welding performance of the welding neck is relatively good, and the corrosion is relatively small. We all know that flat welding and welding neck are two different connection methods when connecting flanges and pipes, so what is the difference between them? Today we will take a look at the welding methods, welding procedures and uses in detail.
The stainless steel weld neck flange is actually the interface end and the pipe that needs to be welded. Whether it is the diameter of the interface pipe or the wall thickness of the pipe, it must be exactly the same, that is, the two pipes are directly welded. The interface of the flat welding flange is different from that of the welded neck flange. The interface of the flat welding flange is generally processed with a concave platform that is slightly larger than the outer diameter of the pipe to be connected. When welding with the pipe, it is necessary to The pipe is inserted inside for welding.
From the welding process point of view, the welding performance of the weld neck flange is better than that of flat welding, and the corrosion of the weld neck flange will be relatively small. However, the welding and installation process of the welded neck flange will be more complicated, and both sides of the flange need to be welded, and the flat welding flange only needs to be welded on one side. But it is not absolute, but from the overall understanding, flat welding is much simpler than welding neck.
From the perspective of use, generally low and medium pressure pipelines use flat welding flanges, while medium and high pressure pipelines use more welded neck flanges. Under high pressure, welding with weld neck flange is mainly to reduce stress concentration. From the perspective of the installation cost of the flange, of course, the complex cost is higher. When the stainless steel weld neck flange is installed, it is higher than the flat welding flange in terms of cost and auxiliary material cost.
After reading the article, do you have a more specific understanding and understanding of flat welding flange and weld neck flange? If you have any questions, you can contact our Huashang Steel professionals, and we will give you a detailed answer.