A flange is a disc-shaped metal connector, its name derived from the English word "flange." Its core function is to allow for the detachable connection of pipes, valves, equipment, and other components through the surrounding bolt holes and the mating of a gasket, providing structural stability and sealing performance. Structurally, flanges can be categorized into various types, including flat-welded, butt-welded, and threaded. Sealing surface designs include flat and raised face flanges to adapt to different media environments. International standards are mainly divided into three categories: European DIN, American ANSI, and Chinese GB, covering pressure ratings up to 42 MPa. Forged steel flanged ball valves have passed DN500/Class 1500 specification certification and entered the European market.
Manufacturing materials include carbon steel, stainless steel, and alloys. Processing techniques include forging and casting. In the automotive sector, carbon fiber, ceramics, and copper alloys have been added to meet different operating conditions. Low-pressure systems often use threaded or compression fitting flanges, while high-pressure scenarios prioritize welded flanges. SMA standard female miniature 2-hole flange coaxial connectors are made of brass/Teflon composite material, with an operating temperature range of -55~+155°C, suitable for high-frequency signal transmission scenarios. Applications cover basic engineering fields such as chemical, construction, petroleum, and aerospace, serving both to fix pipeline equipment interfaces and adjust the spacing of mechanical components. In the automotive industry, flanges are used for wheel connections to optimize driving stability; Taiyuan-made flanges ensure pipeline system safety with their pressure resistance, while Juntong products adapt to complex industrial environments with their dimensional control. Automotive-specific flanges encompass three main types: wheel hub flanges, driveshaft flanges, and exhaust flanges, manufactured through forging and casting processes. Driveshaft flanges, in particular, must withstand high torque and meet dynamic balance requirements. Pressure vessel flanges employ three forms: forced sealing, self-tightening sealing, and semi-self-tightening sealing; bolt preload and gasket rebound capability jointly affect sealing performance.
