Results 11 to 20 of about 212,363 (310)

Treatment to oil injection failure of open-circuit pilot valve of Shafer pneumatic-hydraulic actuator

open access: yesYou-qi chuyun, 2021
Two typical oil injection failures of the same type occurred to 10726-S pneumatic-hydraulic actuators during production and operation. In order to better promote the development of the regional management mode of oil/gas pipelines and stations and ...
Guangtao YAN   +2 more
doaj   +1 more source

Development status and improvement strategy of in-line inspection technology and management

open access: yesYou-qi chuyun, 2020
Pipeline defects have always been the dominant factor leading to pipeline failure. Using in-line inspectiontechnology to inspect and identify various pipeline defects has become a widely acknowledged practice in Chinaand abroad.
Zhiping WU   +5 more
doaj   +1 more source

A partial discharge detection method for high-voltage cables based on FDTD modeling

open access: yesZhejiang dianli, 2023
The partial discharge (PD) of high-voltage cables and the accessories directly affects the insulation performance of power cables. Therefore, a PD detection method for high-voltage cables based on finite-difference time-domain (FDTD) modeling is proposed.
PAN Biao   +5 more
doaj   +1 more source

Exploration and practice of key equipment localization in oil and gaspipelines

open access: yesYou-qi chuyun, 2021
The key equipment of oil and gas pipelines is the important treasure of a country because they are related to national energy security. For many years, the key equipment has been imported, which become a bottleneck restricting the high-quality ...
Xiliang YANG, Dong ZHANG, Yongjun CAI
doaj   +1 more source

Measurement and analysis of water/oil multiphase flow using electrical capacitance tomography sensor [PDF]

open access: yes, 2005
The paper investigates the capability of using a portable 16-segmented Electrical Capacitance Tomo-graphy (ECT) sensor and a new excitation technique to measure the concentration profile of water/oil multiphase flow.
H.L.M., Ameran   +5 more
core   +3 more sources

Control technique for linepack of natural gas pipeline network

open access: yesYou-qi chuyun, 2020
The control technique for linepack of natural gas pipeline network has been studied to ensure the safe and stable operation of gas pipeline network.
Xitong JIANG   +4 more
doaj   +1 more source

Test for effect of welding layers on girth weld toughness of X80 pipeline steel

open access: yesYou-qi chuyun, 2022
The girth welds of natural gas pipelines applied by self-shielded flux cored semi-automatic welding process in multiple layers and passes are prone to failure, and the main reasons include the number of welding layers is less than that required by the ...
Ting WANG   +5 more
doaj   +1 more source

Monitoring technology for complex state of pipeline route based on optical fiber sensing

open access: yesYou-qi chuyun, 2020
It has been a hot research topic at home and abroad to sense the vibration, strain and temperature by communication optical fibers, so as to monitor and position the threat events along the pipeline, but how to realize the fusion and application of the ...
Yongjun CAI   +6 more
doaj   +1 more source

Design of composite membrane emergency drainage device for floating roof tank

open access: yesYou-qi chuyun, 2020
Emergency drainage device is an important safety device for floating roof tank to timely drain the overloaded water in case of emergency. In practical application, a large amount of maintenance work is required for the commonlyused float type emergency ...
Bin PU   +3 more
doaj   +1 more source

Aquatic Effects of a Localized Oil Spill on Lake Conway, AR and Its Tributaries [PDF]

open access: yes, 2015
Oil spills, no matter where they occur, elicit environmental concern and avoiding these disasters should be a priority. Old pipelines that are not regularly maintained and carry large amounts of crude oil long distances are of particular concern.
Bouldin, J. L., Kennon, M. E.
core   +3 more sources

Home - About - Disclaimer - Privacy