Method of making an undersea pipe including anticorrosion linings and welds
US8366351B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 18, 2007 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | May 16, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0447
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method of making steel undersea pipes designed to convey corrosive fluids including water, the method including acting in a workshop on land to assemble together respective ends of at least two unitary pipe elements with carbon-steel first welds to form pipe strings, the first welds being protected by first linings, and acting at sea from a laying ship to assemble together respective ends of the strings by use of anti-corrosion second welds of stainless steel or of anti-corrosion alloy to form a pipe. Each of the ends of the strings are provided with an anti-corrosion cladding which extends over the inside surface made of carbon steel of each end unitary pipe element over a first length of at least 4 times the thickness of the wall of the pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.