Query: installation sense of PSV''s

From: <Pankaj.Mandal@fluor.com>
Date: Thu Jan 13 2005 - 23:33:00 EST

Generally it is NOT desirable to install PSV-s in horizontal plane.

In case of condensing vapour lines (e.g. steam), there are chances that condensate may accumulate upstream of the valve during normal operation. When the PSV pops-up, there are chances that there would be severe hammering effect in the entire pipeline. This is typically the reason why PSV-s are installed at the highest point of a pipeline, pipes gradually sloping in either direction.

One more problem would be proper supporting of the pipes. How would you take care of the reaction force during PSV pop-up?

Best regards,
Pankaj Mandal

"sandeep manoharan" <sandeep.manoharan@eil.co.in> 01/14/05 09:44 AM
Please respond to PipingDesign

To: <PipingDesign@yahoogroups.com>
cc:
Subject: Re: [PipingDesign] Query: installation sense of PSV's
.

if you could englighten me & substantiate your reply...... because i believe PSV's being spring loaded should not be faced with that problem ........ ......

thanks in advance ....

sandeep

• Original Message -----
  From: elie altawil
  To: <a href="/group/PipingDesign/post?postID=MYUtagngVKQt_eB388lc7N5IUYiCegE1CDe7vkzXxb1YffnzdOKZYIVpLBPbjF7NMy39HQrKeRFDJBpkPiLtB9z8r2zB-oA">PipingDesign@yahoogroups.com</a>
  Sent: 14 January, 2005 1:21 AM
  Subject: Re: [PipingDesign] Query: installation sense of PSV's
  

Check with the PSV vendor.

Typically you can't because the valve will not seat properly after
relieving.

sandeep manoharan <sandeep.manoharan@eil.co.in> wrote:

gentle folks....

can PSV's be installed in the Horizontal plane i.e. both inlet & outlet are in
the same horizontal plane. My situation arises because of height & space restriction. In the above i have accounted for condensate draining for both the inlet as well outlet line.

thanks in advance..

sandeep

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[Non-text portions of this message have been removed] Received on Thu Jan 13 23:33:00 2005