Method to reduce pressure drop in polyamide process piping
US4325397A · kind A · utility
3Cited by
4References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1980 |
| Grant date | Apr 20, 1982 |
| Priority date | — |
| Expiry date | Aug 15, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0391
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
This invention is a method to reduce pressure drop in polyamide process piping comprising injecting linear polyethylene glycol having a molecular weight above 10,000 around the periphery of the piping and forming a coating of the polyethylene glycol on the internal surface of the piping where it lubricates the flowing polyamide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.