法兰特点
法兰（flange又叫法兰盘或突缘。 是管子与管子相互连接的零件。连接于管端。法兰上有孔眼，可穿螺栓，使两法兰紧连。法兰间用衬垫密封。法兰管件（flanged pipe fittings）指带有法兰（突缘或接盘）的管件。它可由浇铸而成，也可由螺纹连接或焊接构成。法兰联接（flange，joint）由一对法兰、一个垫片及若干个螺栓螺母组成。垫片放在两法兰密封面之间，拧紧螺母后，垫片表面上的比压达到一定数值后产生变形，并填满密封面上凹凸不平处，使联接严密不漏。有的管件和器材已经自带法兰盘，也是属于法兰连接。法兰连接是管道施工的重要连接方式。
法兰连接使用方便，能够承受较大的压力。在工业管道中，法兰连接的使用十分广泛。在家庭内，管道直径小，而且是低压，看不见法兰连接。如果在一个锅炉房或者生产现场，到处都是法兰连接的管道和器材。
通俗的讲，法兰盘的作用就是使得管件连接处固定并密封。
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