A high hub flange is a type of blind flange that has a larger hub than a standard blind flange. The hub is the central portion of the flange that is used to connect it to a pipe or other fitting. The larger hub provides a more secure connection and also helps to distribute the load more evenly. High hub flanges are typically used in applications where there is a high pressure or temperature, or where a secure connection is critical. They are also used in applications where the flange needs to be able to withstand a lot of vibration or movement. The technical specifications of high hub flanges vary depending on the material, size, and class. However, some common specifications include: Material: Carbon steel, stainless steel, alloy steel, nickel alloy, titanium Size: 1/2" to 120" nominal bore Class: 150, 300, 600, 900, 1500, 2500 Hub height: 1" to 4" Bolt pattern: ANSI B16.5 or ASME B16.47 High hub flanges are typically manufactured to meet the following standards: ANSI B16.5: American National Standards Institute standard for flanges and flanged fittings ASME B16.47: American Society of Mechanical Engineers standard for blind flanges High hub flanges can be purchased from a variety of suppliers. When selecting high hub flanges, it is important to consider the following factors: Material: The material of the flange should be compatible with the material of the pipe or fitting that it will be connected to. Size: The flange should be the correct size for the pipe or fitting that it will be connected to. Class: The class of the flange indicates its pressure rating. Hub height: The hub height should be compatible with the gasket that will be used. Bolt pattern: The bolt pattern should be compatible with the bolts that will be used.
