Open nozzles should be sufficiently resistant to high temperatures
when tested in accordance with 5.14.
After exposure, the nozzle should not show:
-
.1 visual breakage or deformation,
-
.2 a change in flow constant K of more than 5%,
and
-
.3 no changes in the discharge characteristics
of the water distribution test (see
4.4.2) exceeding 5%.