New method determines effect of concrete coating on pipe-collapse pressure
Journal Article
·
· Oil and Gas Journal
OSTI ID:538281
- Fluor Daniel Inc., Houston, TX (United States)
A new method has been developed for determining stresses and pipe ovality that may result from external and internal pressures as well as from the stiffness of a composite steel-concrete wall. The method also determines allowable external pressure for concrete-coated pipe to withstand collapse. Determining the effect of concrete coating on the allowable external pressure may allow reduction of pipe W.T. of, in some cases, up to 50%. The proposed method is based on buckling (collapse) criteria for pipe to be laid in deep water and utilizes a standard calculation procedure for bare steel pipe that accounts for the stiffness of the composite wall. The issue of pipe collapse from external hydrostatic pressure is very important for a pipeline laid in deep water, specifically for a large-diameter pipeline. Frequently, the design W.T. of an offshore pipeline is governed by local buckling criteria rather than hoop stress criteria.
- OSTI ID:
- 538281
- Journal Information:
- Oil and Gas Journal, Journal Name: Oil and Gas Journal Journal Issue: 43 Vol. 95; ISSN OIGJAV; ISSN 0030-1388
- Country of Publication:
- United States
- Language:
- English
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