Polyolefin coated steel pipes
US8415447B2 · kind B2 · utility
5Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 21, 2002 |
| Grant date | Apr 9, 2013 |
| Priority date | — |
| Expiry date | May 21, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1393
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Polyolefin coated steel pipes with high dynamic fracture toughness of the coating of the steel pipes during installation handling and in service, consisting of a steel pipe core, optionally an intermediate foamed plastic material, and a polyolefin coating of β-nucleated propylene copolymers whereby a test polyolefin pipe fabricated from the β-nucleated propylene copolymer has a critical pressure of >25 bars and a dynamic fracture toughness >3.5 MNm−3/2. The polyolefin coated steel pipes are suitable for off-shore transport of crude oil or gas products or district heating applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.