Pipe Tunnels

Pipe Tunnels
E.13.1 Pipe tunnels are to be at least naturally ventilated.
E.13.2 If the pipe tunnels are to be entered via doors or hatches for operating (e.g. for normal operation
of valves or reading of measuring instruments) a mechanical ventilation shall be provided.
E.13.3 If the pipe tunnels are entered from the engine room the engine room ventilation system may
be accepted as sufficient means of mechanical ventilation.
E.13.4 Pipe tunnels containing ducts or pipes with flanges, valves or pumps and open ends to hazardous
areas requiring explosion proof equipment, belonging to the extended hazardous areas (zone 2),
see F.2 These areas are considered safe if they are ventilated with at least 6 changes of air per hour.
Should the ventilation fail, this shall be announced optically and audibly and the equipment not permitted
for the extended hazardous area shall be switched off.
E.14 Thruster rooms
Thruster rooms are to be provided with suitable ventilation so as to allow simultaneously crew attendance
and thruster machinery operation at rated power for the intended period of time.