Dear Friends,
All the options except “SELF-DRAIN TO THE HEADER,
coupled with the philosophy of NO_POCKET” are not
acceptable in this situation.
Recently, an unmanned platform designed by me (my
team, to be more exact) for the Caspian Sea is
commissioned and it went off absolutely smooth while
starting. It is in operation since then.
A few vital aspects of the design are as follows.
1. An independent operating platform (with a pair of
cage ladders at the extremities, mid-way between the
two separators) was provided much above the top of the
separators (production as well as test), on which were
placed all the block valves and PSV manifolds, apart
from providing the gangway.
2. The platform also provided support for the common
flare header discharging into the KOD.
3. This relieved the separator nozzles of all the
piping induced loads.
4. The PSVs and their low dB devices in the discharges
could be nicely located/supported and made accessible
for future maintenance.
5. This resulted in avoiding the vessel mounted
platforms and the associated interface engineering on
both the separators.
6. The idea was well received by the customer.
Anybody, interested may follow the lines.
Cheers!
C. V. Gangadharan.
> Dear Mr. Tushar Zope
>
> The PSV is installed at 3 phase production
> separator. There is mixed fluid stream (Gas &
> condensate). Can i go for option 2 in this case.
>
> regards,
> A. aziz Vayani
>
>
> Tushar.Zope@linde-le.com wrote:
> Dear Mr Abdul,
>
> option 1)
> The best solution is to locate the PSV above the
> flare header and route
> the discharge to flare and branch-off from the top.
> This will avoid the accumulatio of the liquid in the
> discharge. Another
> point is that the header is at very low pressure
> than the inlet.
> There will not be enough pr to push the liquid, the
> flow being
> instanteneous.
>
> option 2)
> Also check, what is the fluid in the inlet line. If
> it is purely gas which
> can remain a gas (without partial condesation) at
> the header operating pr
> and temp., then you can locate the PSV at the skid
> and route the discharge
> upwards. But this will be there is very rare cases
> in petrochemical
> industry. The application is not clear from your
> email.
>
>
> With best regards.
>
> Tushar Zope
> Chief Engineer - Piping
> Linde Process Technologies India Ltd,
> Baroda, India 390 007
> Tel.: +91 265 233 6196
> Fax: +91 265 233 5213
> e-mail: <a href="/group/PipingDesign/post?postID=cT1P3LyD-T6l8lXxdRyHRFs3yZNCVlcljFC7_wNejYKCW9GANpr1wCXDoU_21xePHcVF4qQdjqNJB2hVEgKH">Tushar.Zope@linde-le.com</a>
>
>
>
> abdul aziz vayani <azizvay72@yahoo.com>
> Sent by: <a href="/group/PipingDesign/post?postID=gO8oYbtdWDlu2W5C4bXBcG1F1aQZVxbm4vWbYeXp4VUwL_Xei08WviY8fIEYYVGbAK6vMUi2FJB930kBXeEHWWck2_DA">PipingDesign@yahoogroups.com</a>
> 07/26/2005 02:00 PM
> Please respond to
> <a href="/group/PipingDesign/post?postID=gO8oYbtdWDlu2W5C4bXBcG1F1aQZVxbm4vWbYeXp4VUwL_Xei08WviY8fIEYYVGbAK6vMUi2FJB930kBXeEHWWck2_DA">PipingDesign@yahoogroups.com</a>
>
>
> To
> <a href="/group/PipingDesign/post?postID=gO8oYbtdWDlu2W5C4bXBcG1F1aQZVxbm4vWbYeXp4VUwL_Xei08WviY8fIEYYVGbAK6vMUi2FJB930kBXeEHWWck2_DA">PipingDesign@yahoogroups.com</a>
> cc
>
> Subject
> [PipingDesign] PSV Discharge Piping
>
>
>
>
>
>
>
> Hi everyone
>
>
>
> I have to install a PSV at elevation of 2 ft from
> grade level on a skid.
> Flare header runs at an elevation of 20 ft from
> grade. Discharge of the
> PSV to be connected with flare header. Now there is
> chance of liquid
> accumulation in the vertical portion of PSV
> discharge pipe.Liquid
> accumulation is allowed in the discharge piping of
> PSV and BDV?
>
> If there is not possible to avoid riser pipe then
> what is its remedy to
> overcome liquid accumulation.
>
>
>
> Thanks in advance.
>
>
>
> Regards,
>
> A. Aziz Vayani
>
>
>
>
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