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  • Users: TomaszKruk
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  1. TomaszKruk

    Vapor pressure, negative gauge pressure in a pipe, air bubbles - question about good design practice

    Hello, I feel really dumb to be confused by this, but I started to work with liquids other than water and this whole vapor pressure thing seems to go against my previous practice. First of all - I work mostly with pumping either industrial sewage or water from surface intakes. What it meant...
  2. TomaszKruk

    Force main bypass into gravitatinal flow - how to discharge 3 bar (industrial sewage)

    Hello, the customer has a pumping station with a force main and second pipe acting as gravitational bypass. Gravitational line works 24/7 - it allows them to discharge a fraction of the sewage without it going to pumping station further down the line so they use it. I'm to redesign the...
  3. TomaszKruk

    Pressure drop in compressible flow

    Hello, I have a problem to solve that seemed trivial at first, but kinda got out of hand quickly. I want to properly calculate pressure drop on a gas pipe on a chemical plant. I thought I'd find "plug and play" equations with iterations maybe, but after 2 days of reading I'm horribly confused...
  4. TomaszKruk

    Material compatibility for oxygen service

    hello, I have a question about resources evaluating piping material compatibility for oxygen service. We are using EIGA documents, but they recommend Inconel / Monel / Hastelloy for pressures above 4,0 MPa. And that's it. I was hoping to find some data regarding possibility of using stainless...
  5. TomaszKruk

    Self passivation of Stainless Steel 316L - questions

    hello, kinda newbish questions, but the specific answers are hard to come by from what I could google. Hope someone will take time to answer them. 1) I'm currently on a job, when we are to modify an existing demi water installation. Having removed some pipes I noticed signs of oxidization on...
  6. TomaszKruk

    Concrete underground tank - safe pressure at inlet?

    Hello, I'm at an conceptual stage of a long water line problem and hope the forums can help me. I don't have to design anything specific just yet. I'm hoping someone could give me some general guidelines. I am to design a water pipeline and assumed high pressure losses due to contaminants...
  7. TomaszKruk

    Water filter sludge - how to dispose of it?

    Hello, I'm working on a project, where we're to design a pumping station that takes water from exisiting intake and pumps it over a large distance. Since the intake doesn't have any water treatment equipment we decided on using a conical filter to purify the water before it is discharged into...
  8. TomaszKruk

    Pumping over a hill yet again

    Hello, I read all the other topics, but english is not my first language so I would like to be 100% sure. I'm working on an industrial water system where I am to use existing pumping station and pump the water to a new plant some 60 kms away. There are local high points on the way, but the...

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