Tubular steel members for underwater pipelines
US4300598A · kind A · utility
18Cited by
9References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1979 |
| Grant date | Nov 17, 1981 |
| Priority date | — |
| Expiry date | Jun 12, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L57/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Tubular members of lightly alloyed weldable steel are utilized as a stiffening member for pipelines to prevent buckling and the spread of cracks in pipelines laid off the coast, either under or above water. The tubular member (R, R1) is constructed of centrifugally cast steel and is adapted to be connected to another similar member or to a standard pipe (T) of the pipeline. The member has a substantially increased thickness (2, 15) and is subjected to thermal treatment in order to obtain a homogeneous ferritic structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.