法兰用于在管段之间创建气密但可拆卸(例如与焊接相对)的连接。垫片放置在两个圆形密封面之间，通常用螺钉紧密连接。

　　原文：

　　A flange is used for creating airtight, yet removable (as opposed to welding, for instance) connections between segments of a tube. The gasket is placed between the two circular seal faces, which are usually tightly joined with screws.