澳洲大学石油工程讲座pipe sizing-rev june 2005.ppt

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澳洲大学石油工程讲座pipe sizing-rev june 2005.ppt

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澳洲大学石油工程讲座pipe sizing-rev june 2005

PIPE SIZINGCOMPRESSORS Plastic Pipe vs. Steel Pipe Smoother surface, lower friction No corrosion, less scaling Approximately same first cost Very careful with installation Pressure range up to 3000 psig Low weight, low shipping costs Temperature range: 0-250?F Increased abrasion/erosion Very sensitive to sunlight Farmers like to shoot holes Collapses under vacuum Compressor Applications Gas lift and gas gathering Natural gas and LPG recovery Helium recovery Transmission distribution Repressuring (injection) Gas condensate recovery Gas storage Liquefaction for transport Petrochemical manufacture Gas Turbine Engines Use 4 times stoichiometric air Hold firing temp: 1450-2200?F Rotation: 14,000 to 23,000 rpm Fuel: Diesel, Natural Gas, C3, C4 Fuel Consumption: 10,000 to 13,000 Btu/HP hr * Problem: Gas-Line Sizing Meter Valve 6250 ft. 18 psig 80?F 1 psig plant Field Separator Q = 4500 mscf/d 14.65 psi, 60 ?F 2 4 6 8 1 2 4 6 8 1 2 4 6 8 1 2 2 4 6 8 1 2 4 6 8 1 2 4 6 8 1 2 4 6 8 1 1 8 6 4 2 1 8 6 4 2 1 8 6 4 2 1 Problem: Gas Lines—Parallel Flow P1 = 100 psig P2 = ?? 8.625” OD SCH 40 15,000 ft 6.625” OD Q = 13,000 MCF ID Length: 450 km (280 miles) Diameter: 36 in. Wall thickness: Steel 0.867 in. Concrete 2.250 in. Brent Shetland Isles Orkney Isles St. Fergus Flags Gasline Route Flow 1 fps Length, ft: 2,000 5,089 4,878 8,034 2,000 Material: Inhibited YF5 1.2% 1.2% 1.2% YF5 fresh water Kelzan Kelzan Kelzan Distance from St