Some fittings and equipment have built-flange, flange connection also belongs.
有的管件和器材已经自带法兰盘，也是属于法兰连接。
2
The two pipes, fittings or equipment, each first fixed in a flange on the flange between the two, together with flange pad, fastened together with bolts to complete the connection.
The stress status of end fittingsconnection of inner wedge, outer wedge and clamp construction is analyzed. The connection of fittings with core achieved with tight fit.