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What is the Difference Between Stainless Steel Flange and High Pressuare Stainless Steel Flange?

Feb. 11, 2020

A flange is also called a flange or a flange. It is mainly an important part used for the connection between the pipe and the pipe. The two flanges can also be connected to each other, because the flanges have holes, and the two flanges can be tightly connected using bolts. However, the flanges of different materials are not the same. Needle valve supplier will show you the difference between stainless steel flange and high pressure stainless steel flange.

Blind Flange

Blind Flange

There are many types of stainless steel flanges. Common types are: plate-type flat welding flanges, neck-type flat welding flanges, neck-butt welding flanges, threaded flanges, socket welding flanges, loose The sleeve flange, the blind flange and various non-standard flanges, etc. are collectively referred to as stainless steel flanges. The difference between stainless steel flanges and high-pressure stainless steel flanges lies in the word "high pressure". High-pressure flanges can withstand relatively high pressure. The flanges commonly used on high-pressure pipelines are neck-butt-welded flanges and integral steel flanges. These high-pressure flanges are very strict. Solution and flaw detection must be done, especially the flange neck There are no cracks.

Like ordinary flat welding flanges, the pressure can reach 40 kg, while the pressure of high pressure flanges can reach 2500LB ~ 3000LB, or even higher. The above is the difference between ordinary stainless steel flanges and high pressure flanges.

What are the precautions when producing stainless steel flanges?

The quantity of stainless steel flange production is very important, but the importance of quality seems to be even better. Manufacturers are required to do the following precautions during the production of stainless steel flanges, so as to ensure the use effect.

First, avoid substances that are easily corrosive to stainless steel

For stainless steel, the most important thing is to keep its surface clean. Once it has been corroded, the surface of stainless steel will change its appearance and become less polished. So things that have the ability to corrode stainless steel should be kept away from production. Keep acidic or alkaline gases or liquids away from the production environment.

Second, choose the right gasket for the flange

The function of the flange on the connection pipe is indeed very large, but the presence of gaskets is also indispensable. A good helper for stainless steel flanges in use is asbestos gasket. The material asbestos itself has very good properties, it can resist acidic materials, no matter it is gas or liquid, it can be absorbed by asbestos, so it will not affect stainless steel. Of course, in some special occasions, gaskets made of other materials will be used. At this time, it is necessary to choose gaskets that have complementary capabilities with stainless steel.

Of gaskets.

Third, flange production should take into account the connection

There are different methods for connecting pipes. Those pipes that are relatively thin can be directly screwed and connected with threaded flanges. Some stainless steel flanges need to face some pipes with high pressure, so welding is required. It's more solid and reliable. The flange made of stainless steel is best to choose the welding connection method, regardless of whether the pressure is high or small. Stainless steel welding connections are still very convenient and relatively easy to perform.

The diameter of the stainless steel flange disk and the thickness of the flange are all related to the pressure of the pipeline to be faced. In general, the greater the pressure, the thicker the stainless steel flange.