Yes, for me it is also quite late so need to check the diameter in my spreadsheet :)!
It should be about 10mm so I guess reasonable? However the nozzle reaction force is about 0.5 kN (112 lbf) so probably a bit too high and would pick up larger nozzle.
I asked before but probably it was...
Thank you both.
Does it mean that I can treat 2 l/s 3 bar nozzle ( if I can find it on the market...)as a headloss coming from the fitting? That would allow me to incorporate it into pump curve with some conversion factos depending on velocity/flow.
Yes, looks good in SI units but shouldn't...
Thank you for response.
If I do that, then it means the pump will deliver 2 l/s at 30m head on its discharge port. The hydraulic gradient will be close to zero at the pipework outlet where nozzle will be connected. I struggle to understand how the nozzle be exposed to 3 bar of pressure. Could...
Hi all,
I have created a system curve and overlaid it on the centrifugal pump curve provided by the manufacturer - see attached file.
I would like to install on nozzle at the end of my pipework so that I can achieve about 2 l/s flow at 30m of head but not sure how to include the nozzle in my...
1503-44
Thank you again for detailed explanation. I know two other methods to solve indeterminate systems but this one is new so have familiarised myself with it.
As you suggested, I modelled a pipe as a space frame using tubular section and PE100 properties and assumed that pipeline is fixed...
1503-44,
Thank you a lot for detailed explanation.
Could you please explain why most of the horizontal load would be balanced by a tension in the pipe? For example, the thrust along pipe 2-3 at point 2 is much higher than thrust at point 3 (especially force thrust component along the pipe) so...
Yes, pipe will be properly supported as required by the manufacturer - probably sandbags which should allow for pipe movement and won't make it rigid.
I am still not sure how to investigate bending moment on vertical segments in easy way. If I were to consider that F2x force is about 113.1 kN...
Yes, I fully agree that DI can be regarded as rigid in the setting and that PE pipe will elongate/slightly move due to thrust.
All pipework (DI and PE)have internal diameter of about 300mm. All are rated for 16 bars (including restrained flange adaptor).
Between 2-3 the pipe is about 8m long...
1503-44, The ductile iron pipe between points 1 and 2 has one end load restrained flange adaptor, same between 4 and 5. The bends in points 2 and 4 and flanged ductile iron. The PE pipe (2-3 and 3-4) is electrofused and connected to DI bends with stub ends. The 45 bend is also electrofused...
Hi both,
HTURKAK,
Dashed line shows permanent line that is isolated. The bypass line is between 1-2-3-4.
1503-44,
I must say that is a rather unique nickname!
Thank you for your sketch and good explanation.
What would happen if I had a bit more complicated temporary pipeline as per the file...
Hello all,
I am trying to analyse segment of the pipe as per attached sketch. I drew a simplified thrust force diagram from system pressure and mass flow. Between point 1 and 2 there is a restrained flange adaptor or flanged joint. Would I need to consider longitudinal stress coming from...
Hi,
The borehole was drilled many years ago but the pump will be replaced with a larger pump and installed at greater depth. There is no way to avoid concrete pads unfortunately due to site restraints
Hi all,
Let's assume I have a borehole pump 50m below ground. The dynamic water table during drawdown is 30m beloow the ground. Now I need to lift the pump assembly together with pipework that is filled up with water. The pump is equipped with NRV valve. For the initial lifting:
- can I...
