Flange has thread (thread) connection flange and welding flange. Low pressure small diameter is generally steel flange, high pressure large diameter and low pressure large diameter are generally welding flange, the pressure of flange thickness is different, the diameter and quantity of connecting bolts are also different. Flange gasket also has different materials, depending on the pressure level, from low pressure asbestos gasket, high pressure asbestos gasket, and aluminum tetrafluoride gasket to metal gasket.
Flange connection is characterized by easy disassembly, high strength and good sealing performance. When installing the flange, the two flanges shall be parallel. Flange sealing surface shall not be damaged, but shall be cleaned. Gasket for flange shall be selected according to design specification. Flange connection is an important way of pipeline construction. Flange connection is very convenient to use and can bear large pressure.
The above is the flange connection characteristics and performance classification introduced by Jinan galvanized pipe manufacturer. For more information, please visit http://www.jnxxjm.com