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Gas Pipeline Design


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Class project at Texas A&M University

  • Hi Iyaselex, I am an senior structural engineer got 30 years experience in petrochem, Flue Gas ductwork in Emission Control applications. Recently I am very interesting in Gas Pipe Line Design since this is high demanded field now. Would you please refer me some good handbook or documents for me to get into Design of Gas Pipe Line? You can send me email to, appreciated. Edward
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  • very good book. Usefull
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Gas Pipeline Design

  1. 1. Gas Pipeline Design Abass Babatunde Mohammad Dalu Ibizugbe Nosakhare Cyril Iyasele Natural Gas Engineering May 12, 2010
  2. 2. Outline Introduction Natural gas gathering Transportation of natural gas Pipeline components Pipeline design Conclusion / recommendation
  3. 3. IntroductionThe efficient and effective movement of natural gas from producing regionsto consumption regions requires an extensive and elaborate transportationsystem Gas transmission to consumer may be divided into: Gathering system Compression station Main trunk line Distribution lines Pipelines provide an economical method of transporting fluids over great distances
  4. 4. Natural Gas Gathering The gathering system is made up of branches that lead into trunk lines Must be large enough to handle production of additional leases
  5. 5. Transportation of Natural Gas Gas produced from a well usually travels a great distance to its point of use Transportation system comprises complex pipeline networks Designed for quick and efficient transport of gas from origin to areas of high demand
  6. 6. Pipeline Components Pipes Compressor Stations Metering Stations Valves Control Stations & SCADA systems
  7. 7. Pipeline ComponentsPIPES Measure anywhere from 6 to 48 inches in diameter Certain component pipe sections consists of smaller diameter pipe (0.5 in) Consists of strong carbon steel material, to meet API standards Covered with a specialized coating to prevent corrosion when paced under ground
  8. 8. Pipeline ComponentsCOMPRESSOR STATIONS Natural gas is highly pressurized as it travels through interstate lines To ensure the flowing gas remains pressurized, compression is required Compressor stations usually placed at 40 to 100 mile intervals along pipeline
  9. 9. Pipeline ComponentsMETERING STATIONS Measures the flow of gas along pipeline Placed periodically along interstate gas lines Allows monitoring and management of gas in pipes
  10. 10. Pipeline Components VALVES  Gateways: allow free flow or restriction of gas flow  Interstate lines include valves along entire length  Gas flow may be restricted if a section of pipe requires:  maintenance  replacement
  11. 11. Pipeline ComponentsCONTROL STATIONS Monitor and control gas in pipeline Collect, assimilate, and manage data received from compressor and metering stations Data received is provided by SCADA systems (Supervisory Control And Data Acquisition)
  12. 12. Pipeline DesignPipeline Flow Equations Weymouth
  13. 13. Pipeline DesignDesign Objective Move 21 MMscf/h of gas from Farmington, NM to Seattle, WAConstraints 500 psia suction pressure 500 psia delivery pressure Varying elevations
  14. 14. Pipeline DesignMethodology Cities distances and elevations noted Average temperatures estimated for each city Initial pipe size selected  Max yield strength, allowable working pressure for selected pipe noted Initial guess made for the C.R. required for the first compression station. Expected output pressure computed
  15. 15. Pipeline DesignMethodology Pipe length calculated and compared to the distance between the first two cities Iteration carried out to determine number of compressor stations required between Farmington and Seattle Simulation run for economical solution Installation costs determined Total cost, including cost of pipes noted
  16. 16. Pipeline DesignMethodology Initial pipe size changed, and the entire procedure above repeated Results evaluated to determine the optimum solution for the design
  17. 17. Pipeline DesignResults vs. Cost Cost analysis Nominal # of CAPEX of Diameter NPV @ Compressor Cost of Pipeline Compressors Yearly OPEX (in) 10% Stations ($ Billion) ($ Billion) ($ Billion) 16 4.575 17 1.068 2.167 0.168 20 2.225 6 1.326 0.530 0.046 24 2.436 4 1.624 0.370 0.028 26 2.256 3 1.787 0.307 0.020 30 2.291 2 2.142 0.009 0.018
  18. 18. Pipeline DesignConclusion / RecommendationA transportation network, with pipelines of 20 inches OD and 6 compressionstations will effectively deliver 21,000,000 scf/h of gas, from Farmington, NMto Seattle, WA