Results 281 to 290 of about 472,437 (333)

Three-Dimensional Scour at Submarine Pipelines

Journal of Hydraulic Engineering, 2012
This paper presents results of an experimental study on three-dimensional scour at submarine pipelines with uniform sediment under a unidirectional current in clear-water conditions. The data show that propagation of the scour hole in the transverse direction of flow may be divided into a rapid and a slack phase of development.
Yushi Wu, Yee-Meng Chiew
openaire   +1 more source

Design Criteria for Submarine Pipeline Crossings

Journal of the Hydraulics Division, 1973
This laboratory investigation of pipeline crossings of alluvial streams shows that the rate of scour above the pipe varies as the dimensionless shear stress which is a function of the grain size, the energy slope, and the hydraulic radius. The dimensionless shear stress is used to determine the depth of scour that will occur for various flood ...
David R. Townsend, Donald W. Farley
openaire   +1 more source

Buckle Propagation Pressure for Submarine Pipelines

Journal of Offshore Mechanics and Arctic Engineering, 1993
A new analytical expression is proposed for the prediction of the buckle propagation pressure for deepwater offshore pipelines. The expression accounts for the influences of the main factors involved, including the effects of material and geometrical nonlinearities. Predictions of the proposed expression are shown to be in good agreement with available
G. D. Hahn, M. She, J. F. Carney
openaire   +1 more source

Optimum Design of Submarine Suspended Pipelines

Journal of Energy Resources Technology, 1985
Almost all submarine pipelines are currently laid on the sea floor. This practice is inherently expensive and the system is difficult to maintain and has a high possibility of excessive bending stress. The concept of suspending a pipeline under the ocean surface is investigated in the reported study.
Z. Huang, A. Seireg
openaire   +1 more source

Wave Force Coefficients for Submarine Pipelines

Journal of Waterway, Port, Coastal, and Ocean Engineering, 1988
Wave‐induced forces on a submarine pipeline in regular waves placed near a plane boundary were studied in the inertia‐drag regime. The in‐line root mean square (rms) coefficient was computed using Morison equation and linear wave theory. A Fourier analysis was carried out on transverse forces and nth harmonic transverse rms coefficients were evaluated.
Jothi Shankar, N., Cheong, Hin-Fatt, Subbiah, K.   +2 more
openaire   +1 more source

Leakage from Ruptured Submarine Oil Pipeline

Journal of Transportation Engineering, 1985
The rupture of a submarine oil pipeline gives rise to various mechanisms leading to an oil spill. Among these mechanisms, the leakage of oil driven by the difference in specific gravities of oil and seawater is difficult to estimate. A two‐layer mathematical model and results of laboratory experiments concerning the buoyancy‐driven leak rates are ...
C. Kranenburg, E. Vegt
openaire   +1 more source

Submarine Pipeline Support By Marine Sediments

Offshore Technology Conference, 1971
ABSTRACT This paper deals with the submarine pipeline installed on the bottom. Its summarizes the state of the art in submarine pipeline foundation design as extracted from publications available to the practicing engineer. In particular, it covers the quantitative evaluation of initial settlement.
Sam W. Small, Russell D. Tamburello, Peter J. Piaseckyj   +2 more
openaire   +1 more source

High Accuracy Positioning for Submarine Pipelines

Journal of Navigation, 1976
Among the many problems arising from the exploitation of North Sea oil is that of finding practicable landfalls for the proposed pipelines. The oil companies have been confronted with some of the most difficult landfalls yet experienced where the requirement for precise positioning has been paramount. This paper, which was presented at a meeting of the
openaire   +1 more source

A novel FMEA approach for submarine pipeline risk analysis based on IVIFRN and ExpTODIM-PROMETHEE-II

Applied Soft Computing, 2023
Yang Yu, Jiu Yang, Shibo Wu
semanticscholar   +1 more source

Hydrogen Trapping and Hydrogen Embrittlement (He) Susceptibility of X70 Grade High-Strength, Acid-Resistant, Submarine Pipeline Steel with Mg Treatment

Social Science Research Network, 2023
F. Lang, F. Huang, Jiang-Fei Yue, Liwei Li, Jinqiao Xu, Jing Liu   +5 more
semanticscholar   +1 more source