A field investigation on the effects of background erosion on the free span development of a submarine pipeline

Shipeng Wen, Jishang Xu (Lead / Corresponding author), Guanghai Hu, Ping Dong, Hong Shen

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The safety of submarine pipelines is largely influenced by free spans and corrosions. Previous studies on free spans caused by seabed scours are mainly based on the stable environment, where the background seabed scour is in equilibrium and the soil is homogeneous. To study the effects of background erosion on the free span development of subsea pipelines, a submarine pipeline located at the abandoned Yellow River subaqueous delta lobe was investigated with an integrated surveying system which included a Multibeam bathymetric system, a dual-frequency side-scan sonar, a high resolution sub-bottom profiler, and a Magnetic Flux Leakage (MFL) sensor. We found that seabed homogeneity has a great influence on the free span development of the pipeline. More specifically, for homogeneous background scours, the morphology of scour hole below the pipeline is quite similar to that without the background scour, whereas for inhomogeneous background scour, the nature of spanning is mainly dependent on the evolution of seabed morphology near the pipeline. Magnetic Flux Leakage (MFL) detection results also reveal the possible connection between long free spans and accelerated corrosion of the pipeline.

Original languageEnglish
Pages (from-to)621-628
Number of pages8
JournalJournal of Ocean University of China
Volume14
Issue number4
Early online date23 Jul 2015
DOIs
Publication statusPublished - Aug 2015

Fingerprint

submarine pipeline
Submarine pipelines
Scour
scour
Erosion
erosion
Pipelines
Magnetic flux
leakage
corrosion
Corrosion
sidescan sonar
Leakage (fluid)
Sonar
profiler
Surveying
homogeneity
surveying
effect
Rivers

Keywords

  • Corrosion
  • Scour
  • Span
  • Submarine pipeline

Cite this

Wen, Shipeng ; Xu, Jishang ; Hu, Guanghai ; Dong, Ping ; Shen, Hong. / A field investigation on the effects of background erosion on the free span development of a submarine pipeline. In: Journal of Ocean University of China. 2015 ; Vol. 14, No. 4. pp. 621-628.
@article{d985b3862553453bb1acb9df6026031a,
title = "A field investigation on the effects of background erosion on the free span development of a submarine pipeline",
abstract = "The safety of submarine pipelines is largely influenced by free spans and corrosions. Previous studies on free spans caused by seabed scours are mainly based on the stable environment, where the background seabed scour is in equilibrium and the soil is homogeneous. To study the effects of background erosion on the free span development of subsea pipelines, a submarine pipeline located at the abandoned Yellow River subaqueous delta lobe was investigated with an integrated surveying system which included a Multibeam bathymetric system, a dual-frequency side-scan sonar, a high resolution sub-bottom profiler, and a Magnetic Flux Leakage (MFL) sensor. We found that seabed homogeneity has a great influence on the free span development of the pipeline. More specifically, for homogeneous background scours, the morphology of scour hole below the pipeline is quite similar to that without the background scour, whereas for inhomogeneous background scour, the nature of spanning is mainly dependent on the evolution of seabed morphology near the pipeline. Magnetic Flux Leakage (MFL) detection results also reveal the possible connection between long free spans and accelerated corrosion of the pipeline.",
keywords = "Corrosion, Scour, Span, Submarine pipeline",
author = "Shipeng Wen and Jishang Xu and Guanghai Hu and Ping Dong and Hong Shen",
year = "2015",
month = "8",
doi = "10.1007/s11802-015-2458-7",
language = "English",
volume = "14",
pages = "621--628",
journal = "Journal of Ocean University of China",
issn = "1672-5182",
publisher = "Springer Verlag",
number = "4",

}

A field investigation on the effects of background erosion on the free span development of a submarine pipeline. / Wen, Shipeng; Xu, Jishang (Lead / Corresponding author); Hu, Guanghai; Dong, Ping; Shen, Hong.

In: Journal of Ocean University of China, Vol. 14, No. 4, 08.2015, p. 621-628.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A field investigation on the effects of background erosion on the free span development of a submarine pipeline

AU - Wen, Shipeng

AU - Xu, Jishang

AU - Hu, Guanghai

AU - Dong, Ping

AU - Shen, Hong

PY - 2015/8

Y1 - 2015/8

N2 - The safety of submarine pipelines is largely influenced by free spans and corrosions. Previous studies on free spans caused by seabed scours are mainly based on the stable environment, where the background seabed scour is in equilibrium and the soil is homogeneous. To study the effects of background erosion on the free span development of subsea pipelines, a submarine pipeline located at the abandoned Yellow River subaqueous delta lobe was investigated with an integrated surveying system which included a Multibeam bathymetric system, a dual-frequency side-scan sonar, a high resolution sub-bottom profiler, and a Magnetic Flux Leakage (MFL) sensor. We found that seabed homogeneity has a great influence on the free span development of the pipeline. More specifically, for homogeneous background scours, the morphology of scour hole below the pipeline is quite similar to that without the background scour, whereas for inhomogeneous background scour, the nature of spanning is mainly dependent on the evolution of seabed morphology near the pipeline. Magnetic Flux Leakage (MFL) detection results also reveal the possible connection between long free spans and accelerated corrosion of the pipeline.

AB - The safety of submarine pipelines is largely influenced by free spans and corrosions. Previous studies on free spans caused by seabed scours are mainly based on the stable environment, where the background seabed scour is in equilibrium and the soil is homogeneous. To study the effects of background erosion on the free span development of subsea pipelines, a submarine pipeline located at the abandoned Yellow River subaqueous delta lobe was investigated with an integrated surveying system which included a Multibeam bathymetric system, a dual-frequency side-scan sonar, a high resolution sub-bottom profiler, and a Magnetic Flux Leakage (MFL) sensor. We found that seabed homogeneity has a great influence on the free span development of the pipeline. More specifically, for homogeneous background scours, the morphology of scour hole below the pipeline is quite similar to that without the background scour, whereas for inhomogeneous background scour, the nature of spanning is mainly dependent on the evolution of seabed morphology near the pipeline. Magnetic Flux Leakage (MFL) detection results also reveal the possible connection between long free spans and accelerated corrosion of the pipeline.

KW - Corrosion

KW - Scour

KW - Span

KW - Submarine pipeline

UR - http://www.scopus.com/inward/record.url?scp=84938065231&partnerID=8YFLogxK

U2 - 10.1007/s11802-015-2458-7

DO - 10.1007/s11802-015-2458-7

M3 - Article

VL - 14

SP - 621

EP - 628

JO - Journal of Ocean University of China

JF - Journal of Ocean University of China

SN - 1672-5182

IS - 4

ER -