Flange Connection of Polyurethane Thermal Insulation Pipe
At present, the most rare connection method of polyurethane insulating steel pipe is welding, but in some polyurethane insulating steel pipe projects, it is also needed to stop the connection with flange.
Pipeline flange can be divided into five basic types according to the connection mode between pipe and pipe: flat welded flange, butt welded flange, threaded flange (all flanges), socket welded flange and loose sleeve flange.
1. Flat welded steel flange: suitable for joining of carbon steel pipes with nominal pressure not exceeding 2.5 MPa. The sealing surface of flat welded flange can be made into lubrication type, concave-convex type and mortise-groove type. Lubricated flat welded flange is the most widely used flange. It is mostly used in tight medium conditions, such as high-pressure non-polluting compressed air and high-pressure circulating water. Its advantages are low price.
2. Butt welded steel flange: It is used for butt welding of flange and pipe. Its structure is reasonable, its strength and rigidity are large, it can withstand low temperature and high pressure, repeated bending and temperature shaking, and its sealing is reliable.
3. Socket and socket flanges: commonly used in pipes with PN < 10.0MPa and DN < 40.
4. Loose sleeve flange: Loose sleeve flange is commonly known as looper flange, split welded ring looper flange, flanging looper flange and butt welded looper flange. It is often used in the condition that the temperature and pressure of medium are not high and the corrosiveness of medium is strong. When the medium is corrosive, the local part of the flange contact medium (flanged joint) is the primary grade data of corrosion resistance such as stainless steel, while the flange ring of high grade data such as carbon steel is used to clamp it to complete the sealing.
5. All flanges: Flanges are often integrated with equipment, pipes, fittings, valves, etc. This type is commonly used in equipment and valves.
In summary, all the above-mentioned Shandong Hipper Pipe Technology Development Co., Ltd. provides, want to know the knowledge of polyurethane insulation pipe manufacturers, welcome to pay attention to our website: https://www.sdhpgy.com Thank you for your support!
