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  1. rsdorn84

    Air drying subsea pipeline - Dew point

    Hi all. I need to figure out the resulting dew point when air drying a subsea pipeline from topside. I figure my inputs are: Topside dew point, Topside temperature, topside pressure, Relative humidity. By pushing the air subsea, the pressure will increase to hydrostatic pressure. Given that...
  2. rsdorn84

    Subsea Free Flooding

    Thank you all for your insights. They are steering me in the right direction. Just to clarify the problem, I´ve attached a diagram. I´ve added an inlet. Research has lead me to a coef. of discharge or resistace coef. Assuming and infinite tank, smaller diameter inlet. Same pipe length and depth.
  3. rsdorn84

    Subsea Free Flooding

    @itsmoked thats one example, through a riser to sealevel. But trying to keep it simple, just a straight pipeline on the seabed, free flooding from subsea to subsea (one direction).
  4. rsdorn84

    Subsea Free Flooding

    @Compositepro this makes sense. This is for an offshore pipeline installation and pre-commissioning problem. Pipelines are usually installed empty and then free flooded with seawater. @LittleInch I´m looking up choked flow , thanks for the reference. Which equation should I be applying for this...
  5. rsdorn84

    Subsea Free Flooding

    Hello all, Im trying to calculate the fill time for free flooding a subsea pipeline. However, when using Bernoulli equation for velocity, the result is very large. Here are my parameters. Empty pipeline initial pressure: 1 bar Water depth: 1,300 m Pressure @ 1,300 m: 131.36 bar Pipe length...

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