CO 2 Pipelines vs. Natural Gas Pipelines 3 Use same steel metallurgy as Natural Gas Pipelines • Keep CO 2 dry Higher operating pressures • Gas –600 psig to 1200 psig • CO 2 –2000 to 3000 psig • Why? Maintain CO 2 in dense phase (>1300 psig) to allow pumping rather than compression. Also allows for smaller pipe diameters. Pumps rather than compression
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