Product application of flange

Product application of flange The flange is the part that connects the pipe and the pipe to each other and is connected to the pipe end. There are small holes in the flange, and the screws connect the two flanges tightly. The flanges are tightly sealed with gaskets.

Flanged fittings refer to fittings with flanges. It can be cast, or it can be threaded, or welded. The flange connection consists of a pair of flanges, a gasket and several screw caps. The gasket is placed between the sealing surfaces of the two flanges. After the screw cap is tightened, the specific pressure on the surface of the gasket reaches a certain number and a disaster occurs, and the unevenness of the sealing surface is filled so that the connection is tight and uneven. leak.

Product application of flange

A flange connection is a detachable connection. According to the connected parts, it can be divided into vessel flange and pipe flange. According to the structure type, there are integral flanges, looper flanges and threaded flanges.

Common integral flanges include flat welding flanges and butt welding flanges. The rigidity of the flat welding flange is poor, which is suitable for applications where the pressure is p≤4MPa; the butt welding flange is also called a high-neck flange, which has a higher rigidity and is suitable for applications with high pressure and temperature.

There are three types of flange sealing surfaces: simpler surface type sealing surface, suitable for applications where the pressure is not high and the medium is non-toxic; concave and convex sealing surface, which is suitable for applications with slightly higher pressure; tongue and groove tightly sealing It is suitable for use in flammable, explosive, toxic media and occasions with high pressure.

A gasket is a circular ring made of a material that can produce generic deformation and has a certain strength. Most of the gaskets are cut from non-metallic sheets, or manufactured by professional factories according to the specified size, and their materials are asbestos rubber sheets, asbestos sheets, polyethylene sheets, etc.;

there are also thin metal sheets (galvanized iron sheets, stainless steel) and Metal-clad gaskets made of asbestos and other non-metallic materials wrapped; there is also a disturbance gasket made of thin steel strips and asbestos strips.

Product application of flange

Ordinary rubber gaskets are suitable for applications where the temperature is lower than 120°C; asbestos rubber gaskets are suitable for applications where the temperature of water and air is lower than 450°C, the temperature of the oil is lower than 350°C, and the pressure is lower than 5MPa. The same corrosive medium, the acid-resistant asbestos board is more commonly used.

In high-pressure equipment and pipelines, lens-shaped or other shaped metal gaskets made of copper, aluminum, 10-gauge steel, and stainless steel are used as appropriate. The contact width between the high-pressure gasket and the tight sealing surface is very narrow, and the processing finish of the tight sealing surface and the gasket is high.

Flanges are divided into threaded connection flanges, welding flanges and ferrule flanges. Low-pressure small diameter has wire flange and ferrule flange, high pressure and low-pressure large diameter are welded flanges, the thickness of flanges and the diameter and number of connecting screws are different for different pressures.