RE: about surge

From: <Erik>
Date: Fri Jan 14 2005 - 06:06:00 EST

What do you mean with - 2 bar? Is it barg? The absolute vacum is - 1 barg or 0 bara, so - 2bar doesn't exsist.

erik

-----Oorspronkelijk bericht-----
Van: Omid Hamlehdar [mailto:omid_7_ae@yahoo.com] Verzonden: dinsdag 11 januari 2005 7:19
Aan: <a href="/group/PipingDesign/post?postID=9mOYciH1XuV_wh71SYccpTJUbLxNwO8zok_OxGu8wUTeH4BAG_-TRnSWXRzH3YHkCAcFP3sNge5LnrFYknjjOx-YgEVWDA">PipingDesign@yahoogroups.com</a> CC: mechproj@xtra.co.nz; <a href="/group/PipingDesign/post?postID=OI_jF3slxAEtRfBTvdF3qvc418oACnPtCuUDcCZYvhYGnuBdCPqXDdPNc4XouRQxd4j3zrLB73DfkWceycwv">erik.scheir@pandora.be</a> Onderwerp: [PipingDesign] about surge

Hi all

  I have a project for water handling, a pipeline with 100 km length, I am studying about surge in it according to a probable rapture in pipe and I am going to close two valves surrounding rapture point to avoid wasting water and to find out about surge cause by closing valves.

Any body has experience in this regards? How shall we protect our system?

I have heard from Erhard valve, they recommend a valve called "pipe burst control valve" to avoid wasting water when there is a rapture, this valve will be closed in around 2 min and this will cause surge in system, in some point we have -2 bar minimum pressure. I know that you may need to know about the profile but generally I would like to know how shall we suppress this surge?

Best regards

Omid

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