Flexible hoses for sprinkler heads for Extra Hazard classification

Discussion created by tatjana.vasiljevic on Jul 9, 2018
Latest reply on Jul 12, 2018 by cdafd

Is it allow to use flexible hoses for sprinkler heads, which are install in Extra Hazard classified area?

In one of the previews edition of NFPA 13, it was specified only for Light and Ordinary hazard, at edition 2016 i can not find is it allowed or not.