Pressure in pipe and find leakage

AI Thread Summary
In a pipeline system with both 100mm and 150mm diameter pipes, pressure remains constant throughout when filled with water and without leaks. If a leak occurs in the 100mm pipe at a rate of 1 L/min, the pressure difference can be calculated using flow rate equations, considering the Hazen-Williams equation for friction losses during flow. The proposed method of isolating sections of the pipeline to measure flow rates is valid for identifying leaks. Opening multiple outlets simultaneously will affect flow direction and pressure, which should be monitored for accurate results. This scenario is for simulation purposes, with plans to integrate sensors for real-time monitoring.
darren000
Messages
5
Reaction score
0
Could someone please help me with this??

I am working on a problem with 2 pipes, one 100mm and one 150mm in diameter. The shape of the pipeline is a square. half is 100mm pipe and the other half is 150mm pipe.

1.If entire pipeline is filled with water, no leak and no supply, is pressure the same through out the pipeline?

2. If no supply, and there is a leak point on the 100mm pipe at a rate of 1 L/min. what formula should I use to calculate the pressure difference?
 
Physics news on Phys.org
if you could be more clear on how the pipeline looks I think I could be able to help but I do not know what the pipeline looks like at all...
 
Thanks for your reply WillemBouwer.

The pipe network is attached. As you can see, water comes in from supply and goes out to E if all other outlet are shut off.

1. My first approach is to find Leak 1 and Leak 3 by closing A and C. Then flow rate in - flow rate out = flow rate leak. Is my though correct? I assumed leak 1 and leak 3 are minor leaks.

2. Known Leak 3 and Leak 1, I will close B and open A,C,D and assume no other leaks exist. Then I can measure leaks on the left side of A if they are opened.

Please let me know if I'm on the right track or not.
Thanks You. Appreciated.
 

Attachments

If there is no leak and no flow the pressure will be the same, if there is flow theoretically the pressure in the 150mm pipe will be larger but the speed in the 100mm pipe wil be more. If it is a long pipeline the friction will account for some pressure losses if there is flow, which can be calculated using the Hazen-Williams equation.
Yes that thought process will be correct for that specific piece of the pipeline... However, if you open A and B simultaneously what will the flow in both the pipelines be? Is this a real live scenario? If it is, just take a measuring bucket and let the leak flow into the bucket for one minute and see what the volume of the water is... This is the most accurate approach you can have...
 
Thanks for your reply.

I assume if both A and B opens water will flow both ways, I will update on this tomorrow.
This is for simulation purpose. Connecting all the sensors to PLC and monitor them through a display.

Best Regards
 
Hi there, im studying nanoscience at the university in Basel. Today I looked at the topic of intertial and non-inertial reference frames and the existence of fictitious forces. I understand that you call forces real in physics if they appear in interplay. Meaning that a force is real when there is the "actio" partner to the "reactio" partner. If this condition is not satisfied the force is not real. I also understand that if you specifically look at non-inertial reference frames you can...
I have recently been really interested in the derivation of Hamiltons Principle. On my research I found that with the term ##m \cdot \frac{d}{dt} (\frac{dr}{dt} \cdot \delta r) = 0## (1) one may derivate ##\delta \int (T - V) dt = 0## (2). The derivation itself I understood quiet good, but what I don't understand is where the equation (1) came from, because in my research it was just given and not derived from anywhere. Does anybody know where (1) comes from or why from it the...
Back
Top