法兰应用中几个必须注意的问题

Key Points in the Application of Flanges

法兰连接是过程检测和控制仪表与工艺设备及管道连接的最常用和最主要的方法。从国外引进的仪表和设备所用的法兰标准多种多样,密封面形式复杂,压力—温度等级多样,制作法兰所用材料名目繁多。相同的法兰标准因材料类别不同,其耐压不同,在不同温度条件下,耐压也不同。归纳出关键的几点,有助于删繁就简,可避免差错或少出差错。

The flange connection is the most often used and main method for the connection between process measurement and control instruments and equipments, instruments and equipments are varied, the type of and pipeline. The standard of flanges in the imported sealing face is complecated, the grade of pressuretemperature is various, the materials of flanges are quite different. The same flange standard has different pressure rating because the different materials is used. Also it has different pressure rating at different application temperature. The key points are summarized, it can be simple to avoid or reduce making mistakes.