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

d) The weight loss alarm signal threshold of the weighing device of high-pressure carbon dioxide storage container should be calibrated by using tension meter and other detection instruments every year. When the net weight of fire extinguishing agent is less than 90% of the designed storage capacity, the alarm can be given;

e) Check the environment around the safety relief device, selection valve, signal feedback device and pressure relief device every month, and there should be no debris or obstacles affecting the operation;

f) Check the lead seal of safety release valve every month, and it should not be removed or damaged;

g) Check the corresponding protection area identification of the operating device every month, which should be accurate, complete and clear;

h) Check all connections of the driving device every quarter;

i) Check the connecting hose quarterly, and there should be no deformation, crack and aging phenomenon;

j) Every six months, according to the relevant provisions of GB 50263, one simulated start-up test shall be conducted for each protection zone of the gas fire extinguishing system in the automatic starting mode;

k) Each protection zone of the gas fire extinguishing system shall be simulated once a year in accordance with the relevant provisions of GB 50263.

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DB11/T 1620—2019

Maintenance method:

a) Clean the system components, slightly rusted, and the protective coating is missing. Polish it first and then apply the topcoat. Restore the damaged nameplates and the identification plates of the protected objects;

b) The loosening valve of the starting device is loose;

c) The protective cover, lead seal and safety signs of the defective manual operation device shall be restored;

d) Clear the obstacles around the safety relief device, selection valve, signal feedback device and pressure relief device;

e) If the lead seal of the safety release valve is removed or moved, the manufacturer shall be informed to adjust or calibrate it and restore it. Clean and keep the outlet of the safety release valve unblocked;

f) Mark the protective area corresponding to the damaged operating device.

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May 24, 2020

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Maintenance of fire protection facilities

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

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