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  1. 121202

    Piping Brittle Fracture Risk During Blowdown

    When plant containing pressurised gases and liquids is blowndown (depressurised), the depressurisation can cause piping and vessels to become chilled. The temperature within the plant drops as the pressure drops and the minimum vessel and piping temperatures coincide with the minimum internal...
  2. 121202

    Turbine Generator Control

    How is the output power of a turbine generator controlled? Please explain the entire system including reference to - Control of the gas generator and power turbine - The control of the fuel\heat rate - How the electrical output of the generator is controlled My understanding is pretty basic...
  3. 121202

    Turbine Generator Output Control

    How is the output power of a turbine generator controlled? Please explain the entire system including reference to - Control of the gas generator and power turbine - The control of the fuel\heat rate - How the electrical output of the generator is controlled My understanding is pretty basic...
  4. 121202

    Lateral Torsional Buckling

    What constitutes lateral support to prevent lateral torsional buckling in steel I-Section beams? For example, is it adequate to provide transverse stringers connected to the compression flanges of parallel beams, i.e. to provide a grid structure? If that is acceptable I presume that you...
  5. 121202

    Lateral Support

    What constitutes lateral support to prevent lateral torsional buckling in steel I-Section beams? For example, is it adequate to provide transverse stringers connected to the compression flanges of parallel beams, i.e. to provide a grid structure? If that is acceptable I presume that you...
  6. 121202

    Separation of Crude Oil & Water

    I am interested in opinions regarding the practicality of dehydrating a sweet light (40 API) crude oil to a BS&W content of 0.5% using a horizontal three-phase separator fitted with high efficiency coalescing media. The emulsion forming tendency of the crude is very favorable. The crude...
  7. 121202

    Compressor Reverse Flow Relief Sizing - Additonal Info

    Gents, thanks for your replies. See additional info below. Each train has three compression stages (LP,MP&HP). The trains are connected at the discharge of the LP and HP machines (there is a single Glycol Absorber between the LP and MP Compressors). There is no connection between the...
  8. 121202

    Compressor Reverse Flow Relief Sizing

    I am interested in hearing about the opinions of experienced process engineers regarding their experience on reverse flow cases in compressor installations. I am reviewing an oil and gas plant that has two parallel trains of compression. On the discharge side of each compressor there is a non...
  9. 121202

    Freeze Protection of PSV Lines

    I am looking for some advice from Chemical Engineers with experience of installing Pressure Safety Valves in cold climates such as Western Canada or Alaska. I am reviewing the design of a process plant that will be located in a harsh environment subject to extreme low temperature (-20 deg C...

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