The dryer hoods including the broke pits at the paper machines in the "old" paper mill had been equipped with sprinkler systems inside the hoods.
The new building of APM 3 has roof sprinkler protection, which gives a good basic protection for both the machine and the ground floor level (see specific recs for shortcomings).
The paper machine dryer hood and pits are equipped with a steam smothering system. Such systems are typical for pulp dryers, where the type of combustible is of different nature and always of less combustibility. In the case of paper machines the exposure is different (see below