Maintanance and inspection of dry powder fire extinguishing system

The dry powder fire extinguishing system includes stations, where tanks with powder and cylinders with carrier gas, extinguishing points with hend-held lances or firefighting monitors, pipelines and fittings for starting the system and supplying powder to the fire nozzles are located.

Maintenance intervals:

• Once a month
• Once a year
• At least once every 2 years
• At least once every 10 years

The verification process includes:

• Check of content of pilot cylinders;
• Desintegration of the powder by nitrogen;
• Inspection and functional test of the main valve/s and/or distribution valve;
• Check of the starting devices and non-return valve on opening;
• Visual inspection of connecting lines from discharge valves and/or heads;
• Under pressure leak-test for manifold and pipelines in distribution valve;
• Visual inspection of all discharge valves and/or heads;
• Inspection, tests and scavange of distribution lines and nozzles;
• Inspection and tests of powder guns and powder monitors;
• Inspection and tests of pilot lines;
• Inspection and tests of powder hoses;
• Visual check-up of dry powder rooms, doors, hinges, locks, control box/es and key boxes;
• Checking alarm and smoke sampling system;

After all the tests are over we re-connected the system, seal it and left in operational order with inspection date labels attached.