Pipe expansion method
US8640337B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2007 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Aug 4, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49375
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pipe expansion method capable of reducing an inspection range (area) of a heat-transfer pipe secured to a pipe plate and capable of shortening the time required for inspection is provided. In a pipe expansion method for securing a heat-transfer pipe inserted in a pipe hole of a pipe plate by expanding the pipe, after tightly fitting an outer circumferential surface of the heat-transfer pipe to an inner circumferential surface of the pipe hole from a primary-side end face to a secondary-side end face of the pipe plate, surface pressure between the heat-transfer pipe and the pipe plate is further increased in a predetermined range from the secondary-side end face, or close to the secondary-side end face, towards the primary-side end face.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.