External pipe coatings for a reinforced pipe
US3939874A · kind A · utility
12Cited by
1References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1974 |
| Grant date | Feb 24, 1976 |
| Priority date | — |
| Expiry date | Feb 19, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31717
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Metal pipes are protected from corrosion by externally coating the pipe with a layer of coal tar and wrapping the pipe with at least one extensible material which is porous to allow the coal tar to pass through to form a layer on the outside. This type of wrap avoids any cracking of the protective materials during the commissioning and operation of the pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.