NFPA 11: Minimum discharge times for cooling water and foam application

[alienitmeca]

Hello

I'm designing a fire fighting system for a storage tank (150 m3 / gasoil), feeding a gasoil dispensing unit

NFPA 11 indicates rates and discharge times for cooling water and foam application.
[ul]
[li]cooling water : 60 minutes[/li]
[li]foam application for extinghshing tank on fire : 20 minutes[/li]
[li]foam application for extinghshing dike on fire : 30 minutes[/li]

[/ul]
However, other standards indicates time application rates which are far greater than the NFPAs', the oringin of this difference seems to come from considering the time needed for a second intervention from another source(such as fire fighting truck),

I need to know wether the NFPA, indicates when to extend application rates ? if it does, where can i find it, because i'm going to have to design a water reserve tank along with a emulsifier tank.

Thank you in advance

 

[chicopee]

Did you read the scope of NFPA 11?

 

[alienitmeca]

yes, of course i did, that's why i am asking, i would like to know wether an other ,longer, discharge time should be used unstead of the one specified in the NFPA 11, or it is more than sufficient to put down the fire.

Thank you in advance