GB 50261-2017 Code for construction and acceptance of sprinkler systems

General Provisions

• 第 1.0.2 条This code applies to the construction, acceptance and maintenance management of automatic sprinkler systems i…
• 第 1.0.3 条The construction, acceptance and maintenance management of automatic sprinkler systems shall, in addition to …
• 第 1.0.4 条The construction of the automatic sprinkler system shall be undertaken by a construction unit with the corres…
• 第 1.0.5 条System installation shall be carried out in accordance with the approved design documents and construction te…
• 第 1.0.6 条System components, piping materials and other equipment shall comply with design requirements and current nat…
• 第 1.0.7 条Before system construction, construction drawings, technical data, construction plans and necessary construct…

Terminology

• 第 2.0.1 条Automatic sprinkler system: a system composed of sprinkler heads, alarm valve assemblies, water flow alarm de…
• 第 2.0.2 条Wet system: a closed system in which the piping is filled with pressurized water used to activate the system …
• 第 2.0.3 条Dry system: a closed system in which the piping is filled with pressurized gas (usually compressed air or nit…
• 第 2.0.4 条Pre action system: A closed system in which the piping is not filled with water under normal standby conditio…
• 第 2.0.5 条Sprinkler head: A component that activates automatically within a predetermined temperature range under heat,…
• 第 2.0.6 条Alarm valve assembly: includes the alarm valve, retard chamber, water motor gong, pressure switch, control va…
• 第 2.0.7 条Water flow indicator: an alarm device that converts a water flow signal into an electrical signal. Used on ea…
• 第 2.0.8 条End water test device: installed at the end of the system pipe network or zone pipe network, used to verify t…

Construction

• 第 5.2.1 条Sprinkler installation shall be carried out after the system pressure test and flushing have passed. During i…
• 第 5.2.2 条Sprinkler heads shall be installed using a dedicated wrench; it is strictly prohibited to tighten them by app…
• 第 5.2.3 条When the sprinkler deflector is higher than the bottom of a nearby beam, or the bottom of obstructions such a…
• 第 5.2.8 条When sprinklers are installed near partitions that do not extend to the ceiling, the horizontal distance and …
• 第 5.2.9 条Before installation, check that the sprinkler model, specifications, nominal activation temperature, response…
• 第 5.3.1 条The alarm valve assembly shall be installed after the water supply network has passed pressure testing and fl…
• 第 5.3.4 条The water motor alarm shall be installed on an exterior wall near a public passage or the duty room, and a va…
• 第 5.4.1 条Before installing the pipe network, the pipes shall be straightened and debris inside the pipes shall be remo…
• 第 5.4.4 条When pipes pass through building deformation joints (expansion joints are commonly provided in hotel building…
• 第 5.4.5 条Horizontally installed pipes should be provided with a slope of 0.002–0.005, and the slope should be directed…
• 第 5.4.8 条Water distribution mains and distribution pipes shall be marked with red color or red rings (concealed pipes …
• 第 5.5.1 条Check valves, control valves and pressure gauges shall be installed on the discharge pipes of fire pumps; con…
• 第 5.5.6 条The fire pump adapter shall be installed in the following order: inlet, body, connecting pipe, check valve, s…
• 第 5.6.1 条Before system pressure testing, an approved pressure test plan shall be available, and pressure test record f…
• 第 5.6.2 条Strength tests and tightness tests should be conducted with water. After the system pressure test is complete…
• 第 5.6.3 条The test point for the hydrostatic strength test shall be located at the lowest point of the system piping ne…
• 第 5.6.4 条The water pressure tightness test shall be conducted after the water pressure strength test and pipe network …
• 第 5.7.1 条Pipe network flushing shall be carried out section by section after the pressure test has passed. The flushin…
• 第 5.7.3 条The water flow velocity and flow rate for pipe network flushing shall not be less than the design water flow …
• 第 5.8.1 条System commissioning shall be carried out after system construction is completed. Commissioning shall include…
• 第 5.8.2 条Fire pump commissioning shall meet the following requirements: when the fire pump is started automatically or…
• 第 5.8.5 条During commissioning of the wet alarm valve assembly, water is discharged from the test connection; when the …
• 第 5.2.9 条2. In hotel kitchen areas (high temperature locations), special attention must be paid to the selection of th…
• 第 5.4.4 条3. The installation of pipes within suspended ceilings in hotel guest rooms, corridors, etc. must strictly co…
• 第 5.6 条4. System pressure testing and flushing ( , Section 5.7 ) are key procedures for ensuring the long term relia…

System commissioning

• 第 6.1.1 条System commissioning shall be carried out after system construction is completed, and the fire water pool and…
• 第 6.2.1 条Fire pumps should start normally within the specified time (within 30s), and automatic, manual and remote sta…
• 第 6.2.2 条The start/stop pressure of the jockey pump shall comply with the design requirements, and the number of start…
• 第 6.2.3 条During commissioning of the wet alarm valve assembly, the hydraulic alarm bell should sound within 5–90 s, an…
• 第 6.2.4 条Drain water at the end of line test valve; the system should start the fire pump within the specified time (w…
• 第 6.2.5 条The fire control room shall be capable of displaying the operating status and feedback signals of equipment s…
• 第 6.2.6 条During the system linkage test, fire signals shall be simulated to confirm that all system components (alarm …

System Acceptance

• 第 8.0.1 条After the system is completed, project acceptance must be carried out; if the acceptance fails, the system mu…
• 第 8.0.3 条During system acceptance, the consistency of the system installation locations, components, pipe materials an…
• 第 8.0.4 条During acceptance, verify whether parameters such as the effective volume and setting height of the fire wate…
• 第 8.0.5 条During acceptance, check whether the alarm valve assembly, water flow indicator, signal valve, end water test…
• 第 8.0.6 条During acceptance, system functional tests shall be conducted, including the function of wet alarm valve asse…
• 第 8.0.7 条During acceptance, a system interlock test shall be conducted; after simulating a fire signal, the system sha…
• 第 8.0.8 条During acceptance, the system piping network's hydrostatic strength test, tightness test records and flushing…
• 第 8.0.9 条During acceptance, check whether the sprinkler installation spacing, distance from obstructions, distance bet…
• 第 8.0.10 条During acceptance, check whether the operating pressure of the sprinkler at the most unfavorable point of the…
• 第 8.0.11 条During acceptance, check whether the number, location, and labeling of fire water pump adapters are clear and…
• 第 8.0.12 条During acceptance, check whether the open/close status of the system control valves and the locking devices a…
• 第 8.0.13 条During acceptance, check whether the linkage control functions between the system and the automatic fire alar…

Maintenance Management

• 第 9.0.1 条The automatic sprinkler system shall have management, inspection, and maintenance procedures and shall be kep…
• 第 9.0.4 条Fire water tanks, fire water reservoirs and pneumatic water supply equipment shall be inspected once a month,…
• 第 9.0.6 条Solenoid valves should be inspected monthly and subjected to a start up test; faulty valves should be replace…
• 第 9.0.9 条The alarm valve assembly shall undergo the following functional checks:<br 1. Inspect once a month and conduc…
• 第 9.0.10 条Sprinklers should be visually inspected once a month, and any abnormal sprinklers should be replaced promptly…
• 第 9.0.13 条An annual drain test shall be conducted on all terminal test valves of the system, and the system start up, a…
• 第 第9.0.3条 条Note: For hotel buildings, due to high personnel turnover, frequent decoration and renovation, and complex wa…

Maintenance management

• 第 9.0.3 条Daily visual inspection of water source control valves and alarm valve assemblies shall be carried out, and t…
• 第 9.0.5 条Fire pumps should be started and run once a month; fire pumps driven by internal combustion engines should be…
• 第 9.0.7 条All control valves in the system shall be secured in the open or specified position with lead seals or chains…
• 第 9.0.8 条In outdoor valve chambers, the control valve on the inlet pipe should be inspected once every quarter to veri…
• 第 9.0.11 条There shall be a certain number of spare sprinklers for each different specification, and the quantity shall …
• 第 9.0.12 条The following inspections shall be carried out on the system annually:<br 1. Water source supply capacity tes…
• 第 9.0.14 条After the system is put into use, a comprehensive inspection, cleaning and maintenance of the system shall be…

Engineering reference only — verify against project conditions and the latest codes.