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Closed Drain: Buried Or Not.


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#1 Ghasem.Bashiri

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Posted 27 May 2023 - 10:49 AM

During design development of underground vessel (mainly closed drain), two design approach is possible: Buried or NOT. 

I could not find a universal design for this issue. 

With buried vessel, some issue such as accumulation of toxic gas (in case of leakage) or fire issue can be resolved. 

However, maintenance of buried vessel is difficult due to lack of sufficient visible access.

Also, it is not possible to use external pump for buried vessel.

External corrosion of buried vessel is another issue. 

Let me know your recommendation and experiences.

 

:mellow:



#2 Pilesar

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Posted 27 May 2023 - 08:25 PM

Not knowing size or contents limits the usefulness of my comments. Consider partially buried tank and double wall tank. A tank vendor may offer good suggestions based on similar service in your region.


Edited by Pilesar, 27 May 2023 - 08:25 PM.


#3 breizh

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Posted 27 May 2023 - 09:29 PM

Hi,

You should have specific regulation in your country, check for local standard and/or consult environment protection bureau.

At least you should have a secondary containment and spill detector for buried tank.

Based on my experience in Europe and China.

Good luck

Breizh



#4 Ghasem.Bashiri

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Posted 27 May 2023 - 10:30 PM

Please note that I talk about closed drain drum as pressure vessel.
For example see attached drawing.of some our existing design.



#5 breizh

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Posted 27 May 2023 - 10:43 PM

Hi,

no attachment.

Breizh



#6 fallah

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Posted 29 May 2023 - 03:12 AM

During design development of underground vessel (mainly closed drain), two design approach is possible: Buried or NOT. 

I could not find a universal design for this issue. 

With buried vessel, some issue such as accumulation of toxic gas (in case of leakage) or fire issue can be resolved. 

However, maintenance of buried vessel is difficult due to lack of sufficient visible access.

Also, it is not possible to use external pump for buried vessel.

External corrosion of buried vessel is another issue. 

Let me know your recommendation and experiences.

 

 

There is no universal design for this issue and it depends on where, in level standpoint, the drain points are located.

Most closed drain systems rely on gravity flow, hence the relevant collecting drains vessels need to be lower than the lowest level drain point, otherwise the vessels won't receive all gravity drains.

Then for many systems this means the closed drain vessel is required to be buried or to be located in a below ground open pit (In case of no considerable risk for fire or toxicity).

If, in any case, burying vessel or locating inside a below ground open pit is impossible one of the following procedures has to be selected:

 

1-Attaching a portable pump to the drains below the top of the above ground vessel and then pump them up entering into to the vessel,

2-Pressurizing the drain pipes using proper gas, say Nitrogen, to blow the liquid up into the above ground vessel.



#7 shvet1

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Posted 29 May 2023 - 11:43 PM

If you are going to drain a portable water or a milk then buried one is an optimum option.

If you are going to drain a xenobiotic (see Stockholm Convention) or a chemical warfare then unburied is an optimum option.

 

What do you mean "universal design"? Universal for whom? Universal for what reason? Universal for what occasions? What industry and process? What jurisdiction?

 

What is "universal" in one place may be not "universal" in some other.



#8 seuenergy

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Posted 30 May 2023 - 05:13 AM

I am with shvet1. 

Buried vessel could be considered for non-toxic and not-polluted chemicals.

For hazard chemicals, unburied vessel should be preferred. Though capital invested for buried vessel is less, but one leakage could cause much more than unburied solution.



#9 ahmed abd elmonem

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Posted 07 June 2023 - 09:59 AM

closed drain shall be placed underground to achieve gravity flow criteria. however, in oil and gas industry the common practice is the vessel place in open sump to be monitored for any probable leakage and ease to be moved in case of maintenance or internal repair and so on. for any non toxic/ hazard fluid like water for example, the common practice to build underground concrete chambers not vessels (cheaper wise)

thanks,,






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