Natural Gas Pipeline Design And Construction In Permafrost And Discontinuous Permafrost

1977 ◽  
Author(s):  
Amos C. Mathews
Keyword(s):  
Natural Gas ◽  
Gas Pipeline ◽  
Natural Gas Pipeline ◽  
Discontinuous Permafrost ◽  
Pipeline Design ◽  
Design And Construction

Optimization of Long Distance Natural Gas Pipeline Design Proposals Based on Multi-Objective AHM Method

2013 ◽  
Vol 756-759 ◽  
pp. 4309-4313
Author(s):  
Feng Juan Dong ◽  
Xue Fei Lu
Keyword(s):  
Natural Gas ◽  
Pressure Ratio ◽  
Gas Pipeline ◽  
New Method ◽  
Long Distance ◽  
Natural Gas Pipeline ◽  
Delivery Pressure ◽  
Design Case ◽  
Pipeline Design ◽  
Assessment Result

the new method-AHM, and nine parameters which included diameter, delivery pressure, pressure ratio of the first station, pressure ratios of intermediate stations, number of stations, investment costs of pipeline ,investment costs of stations, investment costs of operation ,equivalent cost, have been selected to evaluate design projects of the long distance natural gas pipeline. The results indicate that attribute AHM matches other methods well. The calculation result of the example indicates that AHM method can get a good assessment result for the multifactor and multi-hierarchy complicated problems. The study provides a new method and technique for designers to select the technical feasible and economic reasonable design case, which has some theoretical and practical value.

scholarly journals Responding to a Northern Pipeline Challenge

2000 ◽  
Author(s):  
Terry J. Klatt
Keyword(s):  
Natural Gas ◽  
Liquefied Natural Gas ◽  
Gas Pipeline ◽  
Operating Pressure ◽  
Pipe Steels ◽  
Line Pipe ◽  
Natural Gas Pipeline ◽  
Construction Methods ◽  
Discontinuous Permafrost ◽  
Future Work

An 800-mile natural gas pipeline is being considered as part of an Alaskan liquefied natural gas (LNG) project. Concepts to maximize the pipeline’s value and minimize its cost are considered. The pipeline’s operating pressure has been synchronized with the LNG plant’s inlet pressure to achieve system efficiencies. Line pipe steels are optimized to address pressure, fracture and geotechnical issues. An advanced approach to designing and operating a gas pipeline in discontinuous permafrost is evaluated. Construction methods and strategies have been developed in areas such as trenching and winter construction. Finally, future work to further develop these concepts is identified.

A Study on Cold Region Pipeline Design Based on Full-Scale Experiment

2008 ◽  
Author(s):  
Toshiya Tanaka ◽  
Scott Haung ◽  
Masami Fukuda ◽  
Matthew T. Bray ◽  
Satoshi Akagawa
Keyword(s):  
Natural Gas ◽  
Field Measurements ◽  
Test Site ◽  
Full Scale ◽  
Lessons Learned ◽  
Gas Pipeline ◽  
Cold Region ◽  
Freezing And Thawing ◽  
Natural Gas Pipeline ◽  
Discontinuous Permafrost

One of the major technical challenges in constructing natural gas pipeline is how to cope with cold region pipeline engineering aspects caused by freezing and thawing of soil around the pipeline. A pipeline running through discontinuous permafrost is subject to the potential risk of an unacceptable deformation, which is caused by thaw settlement or frost heaving at the boundary of permafrost and non-permafrost. It is important for a design engineer to predict the behavior of soil-pipeline interaction and make an adequate assessment of safety of pipeline in such portion. Although extensive efforts have been made to document those aspects, relatively little research has been carried out to comprehensively study the behavior of pipeline in response to short- and long-term change of thermal and mechanical properties of permafrost. In order to understand the complex behavior of natural gas pipeline and surrounding soil in cold regions, a full-scale experimental gas pipeline was constructed near Fairbanks, Alaska and had been studied intensively. The research project was carried out from the year of 1999 to 2004 under the sponsorship of Japan Science and Technology. The changes of ground thermal regime, vertical movement of the pipeline and the induced bending stress in the pipes were studied. The research team including researchers from Japan and the U.S collected and analyzed the field measurements from the test site. In this paper, the major findings and lessons learned from the project will be presented together with the result of numerical simulations related to the experiment.

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