chemical storage sprinkler protection

[bullseye]

hi all,

i'm facing the following issue.

On a chemical storage facility there is a pre-action sprinkler type that is just using water.

I'm just concerned that water is not suitable as it will spread chemicals+fire.
How and based on which standard shall i select to adopt foam sprinkler?

and in case i will adopt AFF, is the sprinkler head for a foam system different from the one of water system?

Thank you in advance.

[kskase]

You should look into NFPA30, or specific fuel chemical such as NFPA490.....

There are many purpose of sprinklers for flammable and combustible storage.... Fire control, structural retaining...