On-Line Monitoring to Detect Third-Party Damage on Underground Natural Gas Pipelines Using Accelerometer

2006 ◽  
Vol 110 ◽  
pp. 123-132 ◽  
Author(s):  
Jae Young Nam ◽  
S.H. Choi ◽  
Jae Boong Choi ◽  
Young Jin Kim
Keyword(s):  
Natural Gas ◽  
Signal Transmission ◽  
Field Tests ◽  
Third Party ◽  
Gas Pipelines ◽  
Natural Gas Pipelines ◽  
The Third ◽  
Damage Monitoring ◽  
On Line ◽  
The Third Party

Even though an excavation is not under the direct control of the utility operators, it is the main cause of third-party damage on the underground natural gas pipelines. Since the damage due to third-party excavation may lead to horrible consequences, preventative techniques that can reduce the third-party damage are needed. The purpose of this paper is to introduce an on-line monitoring system using accelerometer to detect a propagating acoustic pressure pulse that is produced from the third-party damage. Also, in order to verify this system, the corresponding field tests were performed considering many third-party damage sources(breaker, hammer drilling, etc.) and signal transmission ratio of each source. From the tests, signals developed by the third-party damage sources were successfully detected with the digital filter, which can distinguish external noises at the distance of 13km. Therefore, it is expected that the system can be used as a useful tool for the third-party damage monitoring of underground natural gas pipelines

Protection of Underground Gas Pipelines From the Third Party Damage by On-Line Monitoring Using Piezoelectric Accelerometer

2005 ◽  
Author(s):  
Chengfan Cao ◽  
Jay-Young Nam ◽  
Jae-Boong Choi ◽  
Young-Jin Kim
Keyword(s):  
Wave Propagation ◽  
Spectral Density ◽  
Power Spectral Density ◽  
Third Party ◽  
Gas Pipelines ◽  
Processing Methods ◽  
The Third ◽  
Power Spectral ◽  
On Line ◽  
The Third Party

While it is difficult to detect target signals, on-line monitoring remains the most reliable method to protect underground pipelines from the third party damage. To distinguish signals from a variety of white noises during remote pipelines monitoring, it is necessary to filter signals from unanticipated noise and to find co-relation among signals. In this paper, an on-line monitoring system based on local area network (LAN) is developed not only to detect a damage occurrence but also to find its location along the pipelines. For this purpose, an acoustic wave propagation model is generated along the gas pipelines, and signals based on the model are compared with experimental data. In modeling the wave propagation, auto power spectral density (APSD) and cross power spectral density (CPSD) processing methods are applied to distinguish damage signals from noises. To locate the damage point on the pipelines, signals from three different piezoelectric accelerometers are monitored, and compared with those from the proposed model. From the experiments, the number of sensors should be determined in accordance with the attenuation coefficient of signal. Also, the proposed scheme which combines APSD and CPSD processing methods is proved to be powerful in practical applications.

The Third Party Inspection Research of Valves for Liquefied Natural Gas Project

2014 ◽  
Vol 1006-1007 ◽  
pp. 367-372
Author(s):  
Wei Pu Xu ◽  
Lie Gao Wang ◽  
Hong Bo Ma ◽  
Yi Ting Liu
Keyword(s):  
Natural Gas ◽  
Liquefied Natural Gas ◽  
Third Party ◽  
The Third ◽  
The Third Party

This paper expounded the necessities of third party inspection for liquefied natural gas project valves. The third party inspection methods are introduced in detail. Tests and operations on each item are analyzed.

CHANGES TO GAS ACCESS LEGISLATION—POLICY RATIONALE AND IMPLICATIONS FOR INDUSTRY

2007 ◽  
Vol 47 (1) ◽  
pp. 377
Author(s):  
M.L. Carkeet
Keyword(s):  
Natural Gas ◽  
Rapid Expansion ◽  
Third Party ◽  
Energy Market ◽  
Regulatory Environment ◽  
Gas Pipelines ◽  
Transportation Services ◽  
Natural Gas Pipelines ◽  
Recent Introduction ◽  
Independent Review

The introduction of a national gas access regime has coincided with a rapid expansion in the Australian market for gas transportation services. The threat of regulation and the approach of regulators, however, have influenced both the configuration of pipelines and the nature of transportation contracts. The recent introduction of reforms to the National Third Party Access Regime for Natural Gas Pipelines (Gas Access Regime), and to part IIIA of the Trade Practices Act 1974 (Cth), has the effect of introducing part but not all of the reforms recommended by the Council of Australian Governments’ Independent Review of Energy Market Directions, and the Productivity Commission’s Review of the Gas Access Regime. The principal amendments, relating to the insertion of an objects clause and the introduction of regulatory holidays for certain greenfield projects are also likely to influence the configuration of pipelines and the nature of pipeline contracts. These amendments are precursors to a major restatement of National Gas Access legislation that will, if enacted, have the effect of creating greater uniformity between the National Electricity Law and the regulatory environment that will apply to gas, but, will also open up the opportunity for pipeline owners and operators to submit to a lighter form of regulation.

Resolving tension from the third-party forgiveness effect

2014 ◽  
Author(s):  
Jaclyn M. Moloney ◽  
Chelsea A. Reid ◽  
Jody L. Davis ◽  
Jeni L. Burnette ◽  
Jeffrey D. Green
Keyword(s):  
Third Party ◽  
The Third ◽  
The Third Party
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