Steel reinforced pipe
US4351364A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1979 |
| Grant date | Sep 28, 1982 |
| Priority date | — |
| Expiry date | Nov 5, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S138/02
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A steel reinforced pipe has a structural wall section sandwiched between inner and outer linings. The inner and outer linings each comprise resin-rich layers reinforced with glass or other fibers to impart the desired characteristics to the inner and outer pipe surfaces. The structural wall section comprises three or more structural steel reinforcing strips encapsulated with a structural epoxy resin and helically wound in the form of helical convolutions one over the other about the pipe axis such that the convolutions of each strip are axially separated from one another, by the epoxy resin, a distance not greater than 3 mm and radially separated from the convolutions of the next adjacent strip, by the epoxy resin, a distance not greater than 0.25 mm. The structural steel reinforcing strips preferably have a width between 100 mm and 200 mm and a thickness between 0.25 mm and 0.75 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.