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  1. LittleInch

    Pinpoint leak point in underground storage steel tank

    A few more details would help, like a cross section and plan drawing. a set of holes or tubes pushed or drilled next tot he tank where you can sample the water / fluid etc should give you an idea where the leak is in terms of 1-2m as the smell or density or colour will be higher closer to the...
  2. LittleInch

    1099 Fee Split Dispute

    Agree 50/50 this time and then make sure the next one is in writing....
  3. LittleInch

    Compressibility of Nitrogen Gas and Liquid Water

    You're not going to end up with many cubic inches of gas.... note that the equations above are all at the same temperature. Unless you pressurises really slowly, the gas will heat up - a lot. I'm not really following the question though. Is the 4382 cubic inches the fixed volume and your...
  4. LittleInch

    In-line diaphragm seal drawing translation form german

    No idea I'm afraid other than some sort of internal specification. I don't really know what this thing is or why you only have a drawing that is 30 years old.... Any more background that would help us?
  5. LittleInch

    Tri-clamp unit

    Thanks for the information. My comments / advice is that I wouldn't do it using a clamp like this. There is simply too much risk, especially when the lid is being taken on and off many times, for something to break, fatigue or be installed incorrectly / worn edges, you name it. There are many...
  6. LittleInch

    Tanker on fire Northsea

    Bloody auto correct on my tablet. Apparently.... But actually vaginally might have been more appropriate when letting the ship basically steer itself into a stationary vessel whilst the captain perused the web.
  7. LittleInch

    Tanker on fire Northsea

    They've released the initial investigation report. Vaginally only the captain on duty / watch in the container vessel.
  8. LittleInch

    What causes PRV blowdown?

    That's the art of the design. Once you start to flow you want the valve to open fully with a very small increase in pressure. There's a lot of effort goes into the design. Blowdown percent is normally in the range 7 to 10%. So difference in force is not that big.
  9. LittleInch

    Temporary Concrete Block Anchorage

    Is there a gap under the TX? Could you not just create a tri angular frame and just use the blocking as extra weight? Or use that to fix the two blocks together?
  10. LittleInch

    What causes PRV blowdown?

    Basically momemtum of the flowing fluid / force of the fluid against the disc or sealing mechanism.
  11. LittleInch

    Temporary Concrete Block Anchorage

    Probably not surprising when all the forces are also being experienced by the blocks as well as the item ( large transformer?) Have you considered screw anchors or burying those blocks? Or just ignoring seismic as an unlikely / rare event over a one year period?
  12. LittleInch

    Motor Bearings Overheating at 60 Hz – Seeking Expert Advice

    Is the pump designed for 60 htz operation? Power goes up by a factor of pump speed ^3. So this is 70% more power at 60 htz than 50 htz. Does that have an impact maybe?
  13. LittleInch

    Multiphase flow pumped in parallel?

    Well contrary to innovative pumps (welcome!), PD pumps are the only ones I am aware of for multiphase pumping. Progressive cavity are ok if the vendor says so. Each pump can work independently or together, but both need to be rated to the same discharge pressure. Pressure though is driven not...
  14. LittleInch

    High temp clamp on flow meters

    There is a user here called "latexman" who is the most knowledgeable one I know about things like this. Try sending him a message and ask him to chip in?
  15. LittleInch

    Tri-clamp unit

    What sort of calculation are you after? Looking at what you have ( any links you can share), look like vendor certified equipment tbh. Vector techlok are the only type I see for high pressure stuff. You're at the top end for size and pressure for these types of clamps. Personally I think...
  16. LittleInch

    High temp clamp on flow meters

    If this is a test set-up where you can fix the location of the input flow and then pipe the output to other test elements, I would be very tempted by either a Coriolis meter or some sort of PD meter tbh. or just pump a defined volume and time how long it takes (simpler the better) I don't know...
  17. LittleInch

    Air valve on falling main

    George, I the pipe itself can syphon back, i.e. all the water int he pipe downstream the high point could flow back, though in reality air will get in there to destroy the sysphon. Here's some papers of gravity flow.. What Imeant previously is that your pressure at the high point could very...
  18. LittleInch

    Air valve on falling main

    Negative head red line is not possible. Red dashed is better but you'll have slack line/ unstable flow Blue line is better, but if you don't have a valve adding back pressure then that last 50m will be leaning towards slack line flow as well. The margins though are really low so it might...
  19. LittleInch

    Air valve on falling main

    Yup. When you're dealing with unstable flow, unstable things happen. Letting it drain from the bottom is not good, but if Katmar is correct and you're only just at atmospheric pressure at the high point when pumping, an air valve could let in sighs of air which died the same thing.

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