| 摘要 |
<p>A method of repairing an under ?nter pipeline from which a defective or damaged length of pipe has been cut away to form longitudinally spacedapart, exposed, pipe ends which method includes the steps of:(a) butt-welding to each exposed pipe end a tubular end portion end portion of a hollow, open-ended member having an inner or outer part-spherical mating surface;(b) butt-welding a sleeve to one end of a length of replacement pipe;(c) mounting on the sleeve a tubular end portion of a hollow open-ended member which has a part-spherical mating surface complementary to that of one of the open-ended members butt-welded to the exposed pipe ends and which is adapted to form therewith a balland-socket coupling;(d) welding to the other end of the replacement pipe a tubular and portion of a hollow open-ended member which has a part-spherical mating surface complementary to that of the other of the members butt-welded to the exposed pipe ends and which is adapted to form therewith a ball-and-socket coupling;(e) positioning the replacement pipe between the exposed pipe ends and mating the respective pairs of open-ended members; and(f) fillet welding the sleeve to the tubular end portion of the open-ended member mounted thereupon and fillet welding the mating open-ended members to each other.</p> |
