RE: Piping problem

From: <Steve>
Date: Tue Oct 29 2002 - 16:29:00 EST

Hi David

If you intend elevating the pump 8m above the dam, you are likely to have NPSH suction problems with the pump. You will need to check this carefully; a booster pump may be required.
Also remember that the pump head at discharge will be reduced by an amount equal to the increase in elevation.

Cheers

Steve McKenzie

-----Original Message-----
From: Wilkonet [mailto:wilkonet@yahoo.com] Sent: Tuesday, October 29, 2002 5:50 PM
To: PipingDesign@yahoogroups.com
Subject: [PipingDesign] Piping problem

Hi Everyone,

I've recently started my first main job as a trainee mechanical engineer. One of the first problems ive came across is to modify a piping system for supply water to a power plant. The material is hdpe, 450mm dia, 7400m long. The is currently insufficient flow so a modification is needed. My modification means that the change in elevation from pump to dam is now -8m instead of previously 8m. (the pipe would be re ruited)This in theory would give suffiecent flow. However I have been warned that if the pump is turned off this could cause a vaccuum to be formed and the pipeline to be crushed.

I have been searching through the net to try and find some information on designing pipe systems but have failed to find anything to give me information on a system which pumps 'down hill'.

It would be great if anybody could give me some advice or any information which would halp me in my problem.

Regards,

David Wilkinson

Texas Flange - a good source for information on industrial flanges, all they ask is for referrals for designs they help with. 877-610-8924.
www.texasflange.com

---

unsubscribe: PipingDesign-unsubscribe@yahoogroups.com

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ Received on Tue Oct 29 16:29:00 2002