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Maintenance of fire protection facilities

5.9.2.4 pipe network and nozzle

Inspection requirements:

a) Check the pipe network and nozzle every month to ensure that there is no collision deformation and other mechanical damage, the surface is free of corrosion, the protective coating is in good condition, the name plate and the identification plate of the protected object are clear, and the protective cover, lead seal and safety sign of the manual operation device shall be complete;

b) Check the nozzle patency every quarter;

c) Check the integrity of the nozzle every quarter and clean the shield between the nozzle and the protected object;

d) Check the pipe network, pipe fittings and nozzle fixation every year, and there should be no loose or missing bolts.

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DB11/T 1620—2019

Maintenance method:

a) Fasten loose pipes and fixed supports (frames);

b) Fasten the loose start-up pipeline interface;

c) The anti-corrosion coating and coating on the surface of the pipeline fall off, which shall be polished and polished first, and then the topcoat shall be applied;

d) If the fixed bolts of pipe network, pipe fittings, flange, nozzle fixed support (frame) and anti sway bracket are loose or missing, they shall be tightened and supplemented. If they are in wet or open places, grease shall be applied at the visible thread;

e) The indoor pipe network and nozzle should be blown once every two years, and the outdoor pipe network and nozzle should be blown once a year to keep the pipe network unblocked. The purging should be carried out from the nozzle to the main pipe, and the air flow velocity should not be less than 20m / s.

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May 25, 2020

46 of the study of "maintenance regulations for building fire fighting facilities"
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