铸造法兰是使用比较普遍的一种 法兰工艺， 具有生产效率高，生产成本低等优点， 适用于中低压管道。在高压力工作的管路中，建议采用锻造 法兰。铸造法兰 密封面形式可以分为平面(FF)、突面(RF)、凹凸面(MFM)、榫槽面(TG)、环连接面(RJ)。

Casting flange is a kind of common flange technology, which has the advantages of high production efficiency and low production cost. It is suitable for middle and low pressure pipes. Forging flanges are recommended in high pressure piping. The form of the cast flange sealing surface can be divided into plane (FF), RF, concave and convex surface (MFM), tenon and groove surface (TG), and ring joint surface (RJ).