| 摘要 |
Apparatus for use in welding end-to-end a pair of annular members such as pipes has first and second annular clamps for encircling and clamping the respective pipes. One of the clamps is supported by the other for axial, transverse, and rocking movements relative to the other clamp while the two pipes are clamped so as to enable the confronting ends of the two pipes to be located in a predetermined relationship prior to being welded together and then maintained in such relationship during welding. Clamping forces are applied on the pipes by radially adjustable pressure members spaced circumferentially about the clamps. The clamps are swingable conjointly from a vertical, operative position to a horizontal position in which the assembly and adjustment of the pressure members is facilitated.
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