Results 31 to 40 of about 945,953 (264)

Gas Losses in the Distribution Networks: An Interdisciplinary Analysis

Energies, 2022
This work focuses on a very important and current problem in the gas field: gas losses in natural gas distribution networks and their impact on the environment, as well as on the company operating the network.
Cristian Nicolae Eparu, Adrian Neacsa, Doru Bogdan Stoica   +2 more
doaj   +1 more source

A Stellar Model-fitting Pipeline for Solar-like Oscillations [PDF]

AIP Conference Proceedings, 2009
5 pages, 2 figs, Stellar Pulsation: Challenges for Theory and Observation (proceedings to be published by AIP)
T. S. Metcalfe, O. L. Creevey, J. Christensen-Dalsgaard, Joyce Ann Guzik, Paul A. Bradley   +4 more
openaire   +2 more sources

Failure Risk Prediction Model for Girth Welds in High-Strength Steel Pipeline Based on Historical Data and Artificial Neural Network

Processes, 2023
Pipelines are the most economical and sensible way to transport oil and gas. Long-distance oil and gas pipelines consist of many steel pipes or pipe fittings joined by welded girth welds, so girth welds are an essential part of pipelines.
Ke Wang, Min Zhang, Qiang Guo, Wei-feng Ma, Yixin Zhang, Wei Wu   +5 more
semanticscholar   +1 more source

A Method of D-Type Weld Seam Extraction Based on Point Clouds

IEEE Access, 2021
Identification of the seam to be welded in automatic welding is an important challenge, especially on a complex 3D surface. At present, most studies on weld extraction are for butt joints and fillet joints.
Jie Gao, Fang Li, Cong Zhang, Wenhao He, Jinhu He, Xubing Chen   +5 more
doaj   +1 more source

Development of a Flow-Measuring Hydropneumatic Bench for Testing Pipeline Valves

Civil Engineering Journal, 2023
Pipe fittings are an important element of any pipeline network, ensuring stable and safe operation by regulating the flow of the working medium. To control the performance of pipeline valves, it is necessary to conduct various tests, the main ones of ...
M. K. Nogmov, Ibragim M. Lianov, Viktor R. Lysenko, Natalia V. Dmitrichenko   +3 more
semanticscholar   +1 more source

Improved Control of Dynamic Loads Within Hydraulic Systems by Considering Nonlinear Properties of Pipeline Fittings

XXVIII. Symposium Electromagnetic Phenomena in Nonlinear Circuits (EPNC 2024)
It is shown that the existing methods and technical means of reducing dynamic loads in hydraulic systems do not allow to significantly reduce pressure fluctuations in the hydraulic network. It does not take into account the real hydraulic characteristics
M. Zagirnyak, T. Korenkova, V. Kovalchuk, O. Kravets   +3 more
semanticscholar   +1 more source

Modelling and transient simulation of water flow in pipelines using WANDA Transient software

Ain Shams Engineering Journal, 2017
Pressure transients in conduits such as pipelines are unsteady flow conditions caused by a sudden change in the flow velocity. These conditions might cause damage to the pipelines and its fittings if the extreme pressure (high or low) is experienced ...
P.U. Akpan, S. Jones, M.N. Eke, H. Yeung
doaj   +1 more source

Computational fluid dynamics-based study on the heavy crude oil-water emulsion flow through sudden expansion, contraction and 90° bend

Journal of Mechanical Engineering and Sciences
Oil-in-water emulsion (O/W) can be prepared to transport heavy crude oil (HCO) through a pipeline effectively with reduced viscosity and pumping power.
Arun Jana, Girish D. Vegad
doaj   +1 more source

Implementation of stability analysis approach for in-pipe inspection robot movement through pipeline fittings [PDF]

FME Transactions
The paper presents the implementation of the system stability testing approach based on the direct Lyapunov method. For this purpose, a pipeline inspection robot consisting of a driving and a driven part was used as an example.
Osman Krešimir, Perić Mato, Stamenković Dragi   +2 more
doaj   +1 more source

Determination of low temperature toughness index of X80 unequaldiameter tee in stations of China-Russia Eastern Gas Pipeline

You-qi chuyun, 2020
To address the fracture control problem of X80 unequal-diameter tee used in China-Russia Eastern Gas Pipeline under low temperature environment (－45 ℃), the finite element model for X80 unequal-diameter tee with defects was built taking into ...
Zeguang YOU, Wenwei ZHANG, Cheng WANG, Weiqing FU   +3 more
doaj   +1 more source