Diesel Storage Tank--Dyke wall--Pump should be inside or outside?

[enggpiping]

Diesel Storage Tank--Dyke wall--Pump should be inside or outside?

Hello all, Need your help on this.
Have a diesel storage tank with a pump suction connected to it. Now I need to have dyke wall for the same. Now just let me know would you consider the pump located inside the dyke wall or outside the dyke wall? What are the reasons?
I think it can be done both the ways but not sure what are all considerations to e taken care.
Pls help....
Is it NFPA which can give some info on this subject? OR any other standard.

Regards,
Abhijit
Plant Layouts

 

[pennpiper]

Q. would you consider the pump located inside the dyke wall or outside the dyke wall? - A. Outside

Q. What are the reasons?
A. Potential Fire hazard

Q. Is it NFPA which can give some info on this subject?
A. NFPA 30

prognosis: Lead or Lag

 

[enggpiping]

Thank you penpiper. Will study the arrangement & get back on this.

Regards,
Abhijit
Plant Layouts

 

[IFRs]

I see lots of electric pumps inside dike walls, earthen and concrete, in diesel, heavy oil and gasoline facilities. The electrical classification is different for sure but it is quite common to have pumps directly adjacent to the tanks for NPSH, recirculation piping network complexity, etc reasons. NFPA and NEC have electrical classification rules.

 

[enggpiping]

I saw some X company (not to mention company name) standard where both the options have been mentioned so need to explore NFPA 30 to know more on this. Your inputs are alway welcome. Thanks

Regards,
Abhijit
Plant Layouts

 

[chicopee]

I have seen both situations. I have designed bulk storage tank arrangements with the pump house outside the dike primarily from a maintenance consideration. Now with piping from tanks to pump house, the latest trend has been to have the piping go over the dike if dike walls are not too high, otherwise piping will be sleeved by another pipe with earthen dike walls or the penetration thru concrete walls will be liquidtight.