Welding method
US4098451A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1977 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | Apr 28, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K9/0282
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of repairing an under water pipeline from which a defective or damaged length of pipe has been cut away to form longitudinally spaced-apart, exposed, pipe ends which method includes the steps of: PA1 (a) butt-welding to each exposed pipe end a tubular end portion of a hollow, open-ended member having an inner or outer part-spherical mating surface; PA1 (b) butt-welding a sleeve to one end of a length of replacement pipe; PA1 (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 ball-and-socket coupling; PA1 (d) welding to the other end of the replacement pipe a tubular end 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; PA1 (e) positioning the replacement pipe between the exposed pipe ends and mating the respective pairs of open-ended members; and PA1 (f) fillet welding the sleeve to the tubula…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.