Air Craft Hangars Suppression Systems

[JoeWill123]

Has anyone done any work with converting Aircraft hangar suppression 3% AFFF systems to Hi-Ex foam systems? If so, any huge issues? problems?

 

[gouveia]

Not sure how you would convert a floor level nozzle based AFFF system to a High Expansion foam system. We have found that the foam generators must be located at the roof to get good coverage.

Delievery meathods are quite different in my experience.

 

[JoeWill123]

All the hangars in question already have overhead suppression AFFF. We are wanting to do away with the AFFF, it cost a huge amount on the flow test every two years. Hi-EX would be much cheaper to test.