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Thanks a lot for your valuable insights and sharing your expertise. @EdStainless: Yes, indeed, we are discussing spikes with peaks lasting only a few seconds. This is why I raised the question regarding the potential impact on the pipes when we briefly exceed the design pressures. I assume that...

Hi all, I'm looking for advice on best engineering practices for simulating a hydraulic pipeline, particularly regarding the maximum allowable pressure for HDPE pipes during transients. I'm currently working with a PE100 PN16 water pipeline (SDR11) and have calculated a Maximum Operating...

Hi LittleInch, Thanks for this explanation! Thoroughly helpful.

Dear all. Thanks a lot for your feedbacks. Really helpful! @Snickster: My drain rates are even higher than this. I have a DN1200 pipe around 30 km in length. The complete line is divided into two sections. The maximum drain time is given by client. Therefore, we added for each section a larger...

Dear All, I am reaching out once again with a question and would greatly appreciate your valuable insights, as you have consistently provided in the past. Kindly refer to the accompanying sketch for context. Situation: I am currently dealing with an isolated pipeline that is being emptied via...

Hi all @LittleInch: Noted. Thanks for your advice! I'll definitely consider that in my proposal. @1503-44: Agree with you. I think it's a matter of experience. Some operators are more convenient by setting the Q setpoint and some with P setpoint. The pipes will be designed accordingly by...

Hi Pierre! Thanks for this reminder. Check valves at discharge side are foreseen for each pump. I don't see the need to have an additional one at the pumping station outlets. Do you agree on that? Best regards, Jack

Dear all, Thanks a lot for your feedback. I really appreciate that. @1503-44: I'm not sure yet if we are expecting a varying flow rate or not (>80% or < 80% of maximum flow for a longer time period) -> will be clarified. However, I've learned that at both stations we have a buffer tank of...

Dear all, I have a situation here which has been bothering me for a while and I really hope someone can give me their expertise on it. Background: I have two pump groups (let's assume three pumps in parallel each), which deliver up to 1.5 m3/s maximum. The amount delivered can vary between...

Dear all First of all thank you very much for your explanation - highly appreciated. Now everything makes much more sense to me! Especially what phenomenon could potentially occur. @MortenA: Maybe I should read a little bit more about "slack flow" in this case to understand more about the...

Hi 1503-44 Thanks for your feedback. Yes, in this case negative pressure would correspond to negative gage pressure. So in the above described scenario we don't use the main reservoir for feeding, only the back-up. Main reservoir is not open. I tried to plot the data (only the section between...

Hi all! I need to solve a small case study and am kind of lost. Hopefully you could give me some valuable inputs or explanations. For better illustration of below description, I draw a little sketch (please see below). Normal Operation: There is a main reservoir (on a hill feeding 3...