Re: Query: installation sense of PSV''s

From: <sandeep>
Date: Fri Jan 14 2005 - 01:05:00 EST

thanks for your interest ....

The "generally not" portion is already clear to me but i want to know why ??
>>Generally it is NOT desirable to install PSV-s in horizontal plane.

refer my earlier mail : i have accounted for condensate draining for both the inlet as well outlet line.
>>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

that should not be a problem as my space constraint is mainly because of

structure above hence supporting is not an issue ....... reactive forces in
horizontal plane ....... i do not see any problem ...provision of guides / cross
guides in the requisite directions should suffice ..........

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

regards

sandeep

"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=hmMkCQS_OzZXPttI31ChJhmpAU52HjjIHG18-J2_kFTKka__R5lZdnCw3SxJ4yUpZNdBXNNOA-0gxMkl8sCYJ7bkadr6Brc">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.

   thanks in advance..

   sandeep

   [Non-text portions of this message have been removed]

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[Non-text portions of this message have been removed] Received on Fri Jan 14 01:05:00 2005