| 摘要 |
A clamp for facilitating the welding of two pipe sections end-to-end comprises a clamp encircling one of the pipe sections adjacent one end thereof and a plurality of jacks removably secured to the clamp circumferentially of the latter. Each jack includes a pair of legs which straddle the clamp and terminate at corresponding ends in grippers which forcibly engage the clamp. The grippers are movable toward and away from each other so as to engage and disengage the clamp and thereby enable a jack to be located at any selected position on the clamp without necessitating any adjustment of the latter.
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