Quantitative Risk Analysis for Natural Gas Long-Distance Pipeline Leakage

2014 ◽  
Vol 1030-1032 ◽  
pp. 661-664
Author(s):  
Zhe Zuo
Keyword(s):  
Numerical Simulation ◽  
Risk Assessment ◽  
Natural Gas ◽  
Emergency Response ◽  
Necessary Conditions ◽  
Quantitative Risk Assessment ◽  
Safe Operation ◽  
Long Distance ◽  
Main Factors ◽  
Accident Scenarios

The risk of natural gas long-distance pipeline and main factors of accidents are analyzed in this paper. According the consequences from above, quantitative risk assessment of long-distance pipelines under specific accident scenarios are completed with the help of numerical simulation model on long-distance pipeline leakage and dispersion. What’s more, on the basis of the assessment results, the necessary conditions for long-distance pipeline safe operation are presented. Finally, conclusions and safe operations under necessary conditions given in this paper are helpful for regular operation of pipeline, accident prevention, emergency response and reasonable supervision.

Deterministic Hazard Evaluation for Natural Gas Pipes Failure

2016 ◽  
Author(s):  
Mohammad Pourgol Mohammad ◽  
Arash Mehrzad ◽  
Morteza Soleimani
Keyword(s):  
Risk Assessment ◽  
Sensitivity Analysis ◽  
Natural Gas ◽  
Weather Conditions ◽  
Hazard Evaluation ◽  
Gas Stations ◽  
Toxic Materials ◽  
Hot Weather ◽  
Accident Scenarios

Gas stations and distribution facilities in a city districts may result in accidents resulting injuries to people living in these districts. The exposure to released toxic materials is another hazard in gas pipes accidents. Therefore, the gas pipe lines demand special attention for the risk assessment. In this study, the gas pipe rupture is evaluated on accident scenarios. Fire concentration range has been analyzed for different scenarios for cold and hot weather conditions. Furthermore, the length of flame has been simulated based on releasing flammable materials with governed equations. For modeling, PHAST software is utilized for simulation of released material in environment by considering the atmosphere conditions. Sensitivity analysis is done by 10% increasing in important parameter of problem. As a case study, a gas station is used for assessment. Furthermore, the results are verified with some published studies.

A New Risk Assessment Model to Check Safety Threats to Long-Distance Pipelines

2021 ◽  
Author(s):  
Duhui Lu ◽  
Guangpei Cong ◽  
Bing Li
Keyword(s):  
Risk Assessment ◽  
Protective Layer ◽  
Assessment Model ◽  
Quantitative Risk Assessment ◽  
Risk Assessment Model ◽  
Long Distance ◽  
Proposed Model ◽  
Integrity Management ◽  
Current Assessment ◽  
Inspection Data

Abstract With the number of long-distance pipelines increasing in China, risk management has become important for controlling pipeline leakage. However, all the current assessment technologies are semi-quantitative and do not include inspection data. To address this problem, a new quantitative risk assessment model is proposed to guide decision-making on excavation inspection and maintenance. Based on previous failure cases, the model includes data about the surrounding soils as well as about the pipeline's protective layer, cathodic protection and thickness readings. Testing of the proposed model on previous failure cases shows that the new model can correctly assess the real leakage risk of a long-distance pipeline and support the quantitative integrity management of a long-distance pipeline during its whole service life.

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