4th International Pipeline Conference, Parts a and B 2002
DOI: 10.1115/ipc2002-27302
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Superhigh Pressure Dense Phase Arctic Pipelines Increase Reliability and Reduce Costs

Abstract: Differential movement in permafrost terrain due to ground freezing or thawing challenges the reliability of buried pipelines proposed for transporting natural gas from Prudhoe Bay and the Mackenzie Delta. Arctic pipelines designed to operate at conventional pressures (that is, below 10 MPa) are susceptible to wrinkling, bulging, and ovalling due to the differential movements they cause at interfaces between frozen and unfrozen ground and between different types of soil. Arctic pipelines designed to operate at … Show more

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“…The dense phase concept was first discussed in 1971 to describe systems that operate at pressure and temperature conditions in which a fluid is in a single phase. In this region, the density of the gas is so high that, although it appears to be a gas, it demonstrates properties of a highly compressible liquid [15].…”
Section: Description Of the Dense Phasementioning
confidence: 99%
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“…The dense phase concept was first discussed in 1971 to describe systems that operate at pressure and temperature conditions in which a fluid is in a single phase. In this region, the density of the gas is so high that, although it appears to be a gas, it demonstrates properties of a highly compressible liquid [15].…”
Section: Description Of the Dense Phasementioning
confidence: 99%
“…• Greater transport capacity: the combination of high pressures and high density of the dense phase leads to transport larger gas volumes through smaller diameters of pipe, which makes it possible to transport more mass per unit volume [15].…”
Section: Hydraulic Benefitsmentioning
confidence: 99%
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