High-pressure metallic pipe provided with connecting head part and method for formation thereof
US5109888A · kind A · utility
Inventor
Key dates
| Filing date | Aug 14, 1989 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Aug 14, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S138/11
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
This invention provides a high pressure metallic pipe having at least one end thereof provided with a connecting head suitable for connection to a counter seat part and a method for shaping the connecting head. The high pressure metallic pipe according to this invention features a metallic ring embedded in a cavity formed therein at the time of buckling so that no cavity erosion due to the high pressure fluid flowing through the pipe takes place. Further, according to the method of this invention, one end of the thick metallic pipe, having a comparatively small outer diameter, is expanded by buckling, a metallic ring is inserted into the extended pipe end and the pipe end is pressed by a punch to form a connecting head with the metallic ring embedded therein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.