Rigid Couplings can not enable the connection system to be flexible, and the couplings are integrated with steel pipes after they are fastened. If the sling has a bigger span, the pipes will support the connection depending on their own rigidity.
2. 撓性管接頭連接：撓性管接頭連接方式使系統具有柔性，允許鋼管有一定量的角度偏差，相 對錯位。鋼管連接后，兩鋼管管端之間留有間隙可適應管道的膨脹、收縮。管 接頭末端載荷的能力。末端負荷是指管接頭槽口可承受沿鋼管軸向負荷的能 力。
Flexible Couplings can enable the connection system to be flexible ,it allows the steel pipe has a certain angle deviation and relative deviation .There are some clearance between the ends of
two steel pipes in order to suit the expansion and shrinkage of the pipelines. The pipe couplings should maintain the normal working condition under the maximum allowable deflection and
dislocation .Flexible Couplings can endure a certain terminal load, which refers to the load along the pipe axis to be borne by coupling grooves.