Results 211 to 220 of about 7,756 (268)

Dynamics of buried pipelines

International Journal of Soil Dynamics and Earthquake Engineering, 1985
Abstract Estimation of peak stresses in buried pipelines due to ground shaking is studied in this paper. Particular attention has been focused on the analysis of the stiffnesses of springs replacing the surrounding ground. It is shown here that these stiffnesses are functions of the wavelengths and frequencies of the seismic disturbance.
P.M. O'Leary, S.K. Datta
openaire   +1 more source

Cyclic Ratcheting Resistance of Buried Pipelines

Offshore Technology Conference, 2017
Abstract Upheaval buckling (UHB) is a common issue for high pressure and high temperature (HPHT) pipelines. The out-of-straightness (OOS) of the buried pipelines combined with the high axial compressive forces induced by the extreme operating conditions causes the pipeline to move upwards till the downward soil resistance is sufficient ...
Thusyanthan, NI, Wang, J, Haigh, Stuart, Robert, DJ   +3 more
openaire   +1 more source

Hierarchical Controller for Autonomous Tracking of Buried Oil and Gas Pipelines and Geotagging of Buried Pipeline Structure

2019 IEEE International Conference on Cybernetics and Intelligent Systems (CIS) and IEEE Conference on Robotics, Automation and Mechatronics (RAM), 2019
Oil, and gas pipeline network around the globe are highly complex and are exposed to extreme environmental conditions. Routine inspection and maintenance of these pipelines thus have high priority in the oil and gas operations. Pigging is one of the most promising internal pipeline inspection technique employed by the oil and gas industry, but the pre ...
Vidya Sudevan, Amit Shukla 0002, Hamad Karki   +2 more
openaire   +1 more source

Vulnerability of Buried Pipelines to Landslides

Volume 2: Pipeline Safety Management Systems; Project Management, Design, Construction and Environmental Issues; Strain Based Design; Risk and Reliability; Northern Offshore and Production Pipelines, 2016
The movement of a mass of rock, debris or earth down a slope is a landslide, which in the pipeline industry is often referred to as ground movement. Landslides continue to cause pipeline failures throughout the industry, sometimes as the singular cause of failure and in others cases as a contributing factor to failures (such as stress corrosion ...
Gerald Ferris, Sarah Newton, Michael Porter   +2 more
openaire   +1 more source

Buried Pipeline Coatings

CoatingsPro, 2008
Looking for the latest coatings application tips? See this e-discussion where coatings contractors provide real-world solutions to their own coating problems.
openaire   +1 more source

Measurement of Deformations in Buried Pipeline

Journal of Surveying Engineering, 1992
Since 1986, measurements of deformations have been made on a section of large‐diameter buried natural gas pipeline in northern Alberta. Precise conventional survey techniques are used to measure the deformations. Three‐dimensional translation components of the deformations are determined through the use of a survey network, while three‐dimensional ...
W. F. Teskey, D. A. Bayly, I. R. Colquhoun   +2 more
openaire   +1 more source

Telluric Effects on a Buried Pipeline

Corrosion, 1993
A 515-km pipeline in northeastern Australia exhibited 5 V telluric potential fluctuations in the 130 km of its length adjacent to the coast. The rest of the pipeline was relatively unaffected. The potential fluctuations were constrained using a combination of potentiostatic cathodic protection (CP) units, diodes connecting the pipeline to Earths, and ...
openaire   +1 more source

Vibration Frequencies of Buried Pipelines

Journal of the Technical Councils of ASCE, 1978
To aid the research on seismic vulnerability, behavior and design of underground piping system, this paper develops and provides the basic fundamentals of dynamics of buried pipelines. The dynamic fundamental frequencies of continuously elastic-supported straight pipelines subjected to axial, torsional and flexural motions. Various boundary conditions,
openaire   +1 more source

Seismic Evaluation of Buried Pipelines

Pipelines 2002, 2002
This paper presents two methods of analysis for buried pipelines subjected to seismic wave propagation effects, temperature load, and internal pressure. The use of closed-form equations for analysis of a single bend with arbitrary bend angle subjected to seismic ground strain, temperature load, and internal pressure is first presented.
Frank W. Kan, Mehdi S. Zarghamee, Brian D. Rose   +2 more
openaire   +1 more source

Buried Seafloor Pipeline Crossing a Fault

Global Oceans 2020: Singapore – U.S. Gulf Coast, 2020
Steel tubular structures are widely used in offshore structures and seafloor pipeline. Soil movement due to storm or earthquake could cause costly damage to buried pipelines or piles of the offshore fixed platform. The objective here is to prevent such failure by strengthening a single wall tubular with double wall, in which the annulus is grouted with
Vul Thang, Peter W. Marshall, David Hui
openaire   +1 more source