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Recent content by SuperG

  1. SuperG

    How to calculate linepack

    Well, linepack is a value that is ever changing due to the transients in a pipeline. It is also a number that gas controllers watch, since they like to keep a pipeline as full as possible. Anyway, I think you are right about filling the pipeline...thanks!
  2. SuperG

    How to calculate linepack

    You are right about a quick check on linepack...it should be iterative. The answers between the 2 programs are similar, but about 40% off from my calculation, which is more of a volume calculation. Well, how about this...how much gas would you calculate to fill and start a pipeline? Would you...
  3. SuperG

    How to calculate linepack

    Does anyone know how to compute linepack in a natural gas pipeline? I can't seem to match by hand what is being reported in several simulation programs...thanks for the help!
  4. SuperG

    Which Gas Equations Use Pipe Roughness

    Which equations do you guys typically use when you want to include pipe roughness?
  5. SuperG

    How did Pipe Efficiency Come About?

    Although I have used pipe efficiency in the past, I was wondering how it came to be in equations? Was it Panhandle? What does the efficiency really measure? Thanks for any help...
  6. SuperG

    Determine Whether Liquid (in Gas) will Block a P/L

    I think that is an excellent guess. We will most likely install those features as a precaution anyway.
  7. SuperG

    Guidance Regarding Liquid Holdup

    Thanks for the info... I am using Pipephase to model a pipeline, which has liquid holdup. I am curious...at steady-state, I see a reported volume of liquid in each pipe segment, well does this mean that once that volume drops out, no more liquids will drop out until some or all is removed...
  8. SuperG

    Determine Whether Liquid (in Gas) will Block a P/L

    Wow! That is some great information and wonderful comments...thanks everybody! I am looking at ambient temperatures as low as 20F and I see the gas temperature gets to ambient very quickly (low flow rates). It was suggested I simply rig up for pigging every week, but I don't like to do that...
  9. SuperG

    Guidance Regarding Liquid Holdup

    After conducting a search, I am afraid I could not come up with any answers, so please forgive me if this ends up being a simple question: Regaring liquid holdup in gas pipelines, the liquid falls out and just sits in the pipeline, not moving...right? If so, what about calculated holdup...
  10. SuperG

    Determine Whether Liquid (in Gas) will Block a P/L

    Folks, I am working on a natural gas pipeline, which will experience liquid holdup. I am concerned that some of this liquid will travel down the pipe into a valley and eventually block the pipeline, preventing the gas from flowing... How do I determine if this is a legitimate concern?
  11. SuperG

    Determine Liquids Recovery Using Pipephase

    Thanks guys...I, too use Pipehase for multiflow pipelines, but in this case I was hoping to estimate the liquid recovery a cryo plant would see. Actually, I don't know enough about the plant, so I cannot realistically simulate the process. I turned the question over to one of our process guys...
  12. SuperG

    Determine Liquids Recovery Using Pipephase

    If I have the composition of a gas, how do I use Pipephase to determine how much propane I can recovery assuming a standard (or typical) cryo plant? What assumptions would I make? Thanks for the help! Gary
  13. SuperG

    How to Calculate Water Line for Floating Pipe

    Thanks for the replies...I have grabbed a trig book and looked up the equations for segments of circles and did the following, which looks like what "bhwtam" said: A = Wt/rho where A=submerged Area, Wt=Total weight of pipe and rho is the density of the fluid in which the pipe will...
  14. SuperG

    How to Calculate Water Line for Floating Pipe

    If I have a pipe that will be floated in water, how do I calculate how deep the pipe will sink, or the height at which the water rises along the pipe? Assume the pipe is horizontal and closed at both ends...thanks for the help!
  15. SuperG

    Temperature Profile in Pipe due to Soil

    What (or where) are the equations for heat transfer between fluid-pipe-soil? I have a pipeline simulator and am determining the temperature decline of a gas. The pipeline is buried 3' under the soil line and the soil line is 100' under water. As I run the model with decreasing flow rate, I...
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