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What is the difference between butterfly valve flange and slip on flange?

Today, Ningbo Xinggang Pipeline Equipment Co., Ltd., a wholesale manufacturer of butterfly valve flanges in Ningbo, will share with you the difference between butterfly valve flanges and flat welding flanges. The outer diameter thickness and center distance of the butterfly valve flange and the flat welding flange are the same. The difference between the butterfly valve flange and the flat welding flange is that the butterfly valve flange has one more inner groove, which is processed by one more process than the flat welding flange, so the price is higher than that of the ordinary flange. The butterfly valve flange is connected with the valve. There is a groove behind the butterfly valve flange, which is inserted into the steel pipe for welding, One or two or more margins are left on both sides of the groove (depending on the diameter of the butterfly valve flange).

Flat welding flange is also called plate flat welding flange (PL). Flat welding flange is relatively cheap because of its simple structure and low material consumption. However, the rigidity and tightness are not as good as those of the neck butt welding flange. The flat welding flange is welded by inserting the pipe into the flange. Because of the poor rigidity, flat welding flange shall not be used in the chemical process piping system with flammable, explosive and high vacuum requirements, and in the highly hazardous occasions. Flat welding flange is widely used in connection of medium and low pressure vessels and pipelines. Flat welding flange is applicable to the connection of fluid pipelines with nominal pressure not exceeding PN2.5MPa. The sealing surface of flat welding flange can be made into three types: lubricating type, concave convex type and mortise groove type. The application of RF flat welding flange is the largest It is mainly used in the case of moderate medium conditions, such as low pressure vessel, water supply pipe network, non purified compressed air, low pressure circulating water, etc.