Template method for replacing a vessel in a pipe system
US4994230A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1989 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Sep 19, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/4973
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for replacing a vessel in a piping system utilizes a template to determine the relative spatial positions of the pipe connections to the vessel in the existing system. The template is then removed from the existing system and reassembled on the new vessel in a remote location to determine the relative spatial position of the new pipe connections to the new vessel to ascertain if alignment will exist between those new pipe connections and the existing pipes in the system. If not, the pipe connections on the new vessel are initially reworked in the remote location to achieve alignment within connection tolerances. The pipes are then cut at their respective connections to the old vessel, the old vessel is removed, the new vessel is put in place in the system and the cut ends of the pipes are connected to new connections on the new vessel to complete the installation of the new vessel in the piping system. This method, which may be utilized, for example, in replacing a steam generator in the primary system of a nuclear energy plant, allows most of the rework to be performed outside a radioactive environment and minimizes the amount of maintenance downtime for the plant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.