Long and high neck flange: The neck height is higher, which improves the rigidity and carrying capacity of the flange. Compared with butt-welded flanges, the welding workload is large, the welding rod consumption is high, and it can not withstand high temperature and pressure, repeated bending and temperature fluctuations, but it is more convenient for on-site installation and can omit the process of welding seam scratching, which is more popular. Manufacturing standard: HG/T20615-2009, ASME B 16.5 ASME B16.47 Long high neck flange Long high neck flange Connection method: flange nut, bolt connection Production process: professional overall forging, forging manufacturing, etc. Processing method: high-precision CNC lathe turning, ordinary lathe fine turning, argon arc welding and other processing Application scope: boiler pressure vessel, petroleum, chemical, shipbuilding, pharmaceutical, metallurgy, machinery, food and other industries
