Flat welded flange is commonly used in pipeline construction pipe fittings, because flange has many advantages in the use process, so it is widely used, I believe everyone has a great curiosity about flat welded flange, flange has what advantages, let’s take a look at it together
Although flat welded flange has certain advantages in practical use, but its shortcomings are very obvious, in view of its own design of a part of the shortcomings, flat welded flange is difficult to ensure that it will not leak when connecting
The following is a part of the shortcomings of flat welded flange design. Access is dynamic, periodic loads (such as thermal expansion and fluctuations) may cause movement between the flange and the flange, which will affect the function of the flange and the flange, and then damage the integrity of the flange, and then lead to leakage.
Sealing performance of flat welded flange
No product can be without defects, the shortage of products is limited to a minimum, so as long as the continuous improvement of the production process of flat welding flange, it can effectively improve the performance of flat welding flange, as far as possible to reduce leakage, flat welding flange can play a real value in welding
Flat welding flange not only does not occupy space and total weight, and has good sealing, to ensure that the interface will not leak out, compact structure leads to smaller flange size and smaller sealed diameter, the second flange gasket has been replaced with a sealing ring, to ensure that the sealing surface collocation, so that only need less pressure can be the lid clamping
With the reduction of the required pressure, the size and number of bolts are further reduced, the end of the design of a small body, light weight (than the traditional flange 70%~80% light) of the new product, so the flat welding flange is from the law and LAN, relatively high quality products, reduce the quality and space, play an important role in industrial applications.
The sealing principle of flat welding flange two sealing surfaces of the bolt will press the flange gasket together to produce a seal, but this will also cause the damage of the seal, in order to maintain the sealing, need to maintain a large bolt force
So the bolt must be made larger, larger bolts must be matched with larger nuts, that is, larger diameter bolts are needed to create conditions for tightening the nut. Obviously, the larger the diameter of the bolt, the less suitable the flange will be, and the flange is likely to bend. The only way to do this is to raise the wall thickness of the flange segment.
These are some of the characteristics of flat welding flange, although the design of flat welding flange has some shortcomings, as long as the production process is up to standard, flat welding flange almost no leakage, flat welding flange has many advantages in the construction process, make flat welding flange become a widely used flange.
