Product Name：Stainless Steel DIN Socket Weld Flange
The neck flange has good rigidity, small welding deformation and good sealing performance, and can be used for the pressure of 1.0~10.0MPa. The B-flange for containers is also a socket weld flange for applications where sealing requirements are high. When designing, the socket weld flange can be checked by integral flange.
Flange is divided into threaded connection (threaded) flange and welding flange. Low pressure small diameter threaded flange, high pressure and low pressure large diameter are welded flange, different pressure flange thickness and connection bolt diameter and quantity are different.
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①Socket welding stainless steel flange: often used in pipelines with PN≤10.0Mpa and DN≤40;
②Loose stainless steel flanges: Loose flanges are commonly called loose flanges, sub-welded ring loose flanges, flanged loose flanges and butt welded loose flanges. It is often used for medium temperature and pressure that are not high. Highly corrosive conditions. When the medium is highly corrosive, the part of the flange that contacts the medium (flanging sub) is made of corrosion-resistant high-grade materials such as stainless steel, while the outside uses low-grade materials such as carbon steel. The flange ring clamps it to achieve sealing;
③Butt-welded steel stainless steel flange: used for butt welding of flanges and pipes. Its structure is reasonable, its strength and rigidity are large, it can withstand high temperature and pressure, repeated bending and temperature fluctuations, and its sealing is reliable. The nominal pressure is 0.25- The 2.5Mpa butt welding flange adopts concave and convex sealing surface.
④Integral stainless steel flange: The flange is often integrated with equipment, pipes, valves, etc., this type is commonly used on equipment and valves.
⑤Flat welding steel stainless steel flange: suitable for carbon steel pipe connection with a nominal pressure not exceeding 2.5Mpa. The sealing surface of flat welding flange can be made into three types: smooth, concave and convex and tongue and groove. Smooth flat welding method The application volume of blue is mostly used when the medium conditions are relatively mild, such as low-pressure non-purified compressed air and low-pressure circulating water. Its advantage is that the price is relatively cheap.
There are three types of carbon steel flange sealing surface
Plane sealing surface: suitable for occasions where the pressure is not high and the medium is non-toxic;
Concave-convex sealing surface: suitable for occasions with slightly higher pressure;
Tenon and groove sealing surface: suitable for flammable, explosive, toxic media and high pressure occasions.
Carbon steel flange gasket is a ring made of materials that can undergo plastic deformation and have a certain strength. Most gaskets are cut from non-metallic plates or manufactured by professional factories according to regular scales. It is asbestos rubber sheet, asbestos sheet, polyethylene sheet, etc.; it is also a metal package gasket made by wrapping non-metallic materials such as asbestos with thin metal sheets (white iron sheet, stainless steel); there is also a thin steel belt and asbestos belt Wrap-around gaskets wound together. Generally rubber gaskets are suitable for occasions where the temperature is lower than 120℃; asbestos rubber gaskets are suitable for water vapor temperature lower than 450℃, oil temperature lower than 350℃, pressure For occasions below 5MPa, acid-resistant asbestos sheets are commonly used for general corrosive media. In high-pressure equipment and pipelines, lens-type or other shaped metal gaskets made of copper, aluminum, 10 steel, and stainless steel are used. The touch width of the high-pressure gasket and the sealing surface is very narrow (line touch), and the processing finish of the sealing surface and the gasket is high.
