Results 21 to 30 of about 1,770 (297)

Prediction on running time of pigs in submarine pipelines [PDF]

open access: yes, 2022
The running time of pigs in submarine pipelines is an important reference for pig receiving operation. In order to identify the factors that influence the running time of pigs, the correlation degree of pipeline mileage, pipeline inlet/outlet pressure ...
Yang CAO   +3 more
core   +1 more source

Stability analysis of submarine pipelines based on 3D model reconstruction

open access: yesYantu gongcheng xuebao, 2017
Due to the scouring of bottom turbulent currents, the submarine pipelines on the soft seabed become exposed or unsupported so that they will be instable.
XIONG Chun-bao 1, LI Zhi 1, SUN Xuan 2, ZHAI Jing-sheng 3
doaj   +1 more source

Floatation of Buried Submarine Pipeline under Cyclic Loading of Water Pressure -Numerical and Experimental Studies- [PDF]

open access: yes, 2000
A dynamic response of a submarine pipeline buried in sandy seabed sediments to water loading generated by harmonically oscillating water-table vertical movements is examined in the present report experimentally and numerically.
Maeno, Shiro   +2 more
core   +1 more source

Three-Dimensional Ultrasonic Reverse-Time Migration Imaging of Submarine Pipeline Nondestructive Testing in Cylindrical Coordinates

open access: yesJournal of Marine Science and Engineering, 2023
Submarine pipelines are a safe and energy-efficient mode of gas transport. However, due to the complex manufacturing process and harsh operating environment, submarine pipelines are subject to fatigue cracks under long-term cyclic loading.
Daicheng Peng   +5 more
doaj   +1 more source

Prediction of submarine pipeline corrosion based on parameter optimized GM-Markov model

open access: yesYou-qi chuyun, 2020
To avoid accidents such as perforation leakage caused by submarine pipeline corrosion, and to timely maintain and protect submarine pipelines, the prediction method for submarine pipeline residual life based on parameter-optimized GM-Markov model was ...
Xinsheng ZHANG   +3 more
doaj   +1 more source

Scour below submarine pipelines under irregular wave attack [PDF]

open access: yes, 2013
Submarine pipelines are widely used coastal structures, and scour around them can influence their stability. In this study, scour around rigid submarine pipelines under normal-incidence irregular wave attack on horizontal and (1/10) sloping beaches is ...
Kiziloz, Burak   +2 more
core   +1 more source

In-silico research of the influence of gas injection into the subsea crude oil pipeline on the paraffin solid phase deposition [PDF]

open access: yesE3S Web of Conferences, 2021
The aim of the article is presenting of the preliminary results of simulations showing behaviour of paraffin deposits in submarine pipelines. The described parameters for changing the deposition of the solid paraffin phase with the flow of crude oil ...
Wójcikowski Artur, Nagy Stanisław
doaj   +1 more source

The influence of incorporating a forecutter on the performance of offshore pipeline ploughs [PDF]

open access: yes, 2013
Installation of offshore pipelines in the seabed can be efficiently achieved using pipeline ploughs. Increased efficiency may be achievable through incorporating a smaller forecutter in advance of the main plough share.
Boyes, Scott   +4 more
core   +1 more source

Numerical analysis for impact of submarine landslides on pipelines

open access: yesYantu gongcheng xuebao, 2019
Submarine pipelines, as important transporting channels of undersea crude oil and natural gas in marine engineering, are usually in the condition of complex marine geological environment and often damaged by the impact of the submarine landslides.
WANG Zhong-tao , ZHANG Yu , YANG Qing , WANG Han-yang
doaj   +1 more source

External Anti-Corrosive Technology for Submarine Pipeline Nodes and Its Effect on Cathodic Protection [PDF]

open access: yesCailiao Baohu, 2023
The anti-corrosive failure of on-site welding points (nodes) of submarine pipelines is the main factor affecting the external anticorrosive failure of pipelines.The quality of anti-corrosive coatings directly affects the safe operation of the entire ...
ZHU Jiaxiang, JIA Guangmeng, LI Ye, YANG Chang, LIU Ruikai, FU Xianqiao, LYUFU Feiyang
doaj   +1 more source

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