large-diameter steel pipe flange

The so-called large flange is a disc-shaped part commonly used in pipeline engineering, and flanges are always used in pairs. In pipeline engineering, flanges are mainly used for pipeline connections. A flange plate is installed on each of the pipes to be connected; threaded flanges can be used for low-pressure pipelines, while welded flanges are used for pipelines with a pressure of more than 4 kilograms. A sealing point is added between the two flange plates, which are then fastened with bolts. Flanges of different pressures have different thicknesses and use different bolts. When water pumps and valves are connected to pipelines, the local parts of these equipment and devices are also made into corresponding flange shapes, which is also referred to as flange connection. Any connecting part that uses bolts around two planes for connection and simultaneous sealing is generally called a "flange". For example, the connection of ventilation ducts, and such parts can be called "flange-type parts".

Large flanges are divided into threaded (screwed) flanges and welded flanges. Threaded flanges are used for low-pressure and small-diameter applications, while welded flanges are used for high-pressure and low-pressure large-diameter applications. Flange plates of different pressures differ in thickness, as well as in the diameter and quantity of connecting bolts.

Renlong Pipe Fittings manufactures and sells various flanges and large flanges:

Processes: cast steel, forging, steel plate

Types: flat welding, butt welding, blind plate, threaded, socket weld, blind flange, galvanized flange

Standards: national standard, non-standard, secondary standard, special-shaped flanges, etc.; in addition, there are American standard, British standard, Japanese standard, German standard, Russian standard, etc.

Materials: carbon steel, Q235, 20#, A105, 16Mn flanges, etc.

According to different pressure grades, flange gaskets are also made of different materials, ranging from low-pressure asbestos gaskets and high-pressure asbestos gaskets to metal gaskets.

1. Classified by material: carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastic, asphalt, PPC, etc.

2. Classified by manufacturing method: forged flanges, cast flanges, welded flanges, rolled flanges (extra-large sizes)

3. Classified by manufacturing standard: national standard (Ministry of Chemical Industry standard, petroleum standard, power standard), American standard, German standard, Japanese standard, Russian standard