GB 50261-1996 Automatic sprinkler fire extinguishing system construction and acceptance specification GB50261-96
Some standard content:
Engineering Construction Standards Full-text Information System
National Standard of the People's Republic of China
GB50261-96
Code for installation and commissioning of automatic fire-extinguishing sprinkler systems
Published on September 2, 1996
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standards Full-text Information System
1997-03-01
Jointly issued
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National Standard of the People's Republic of China
Code for installation and commissioning of automatic fire-extinguishing sprinkler systems fire-extinguishingsprinklersystems
50261—96
Editor: Ministry of Public Security of the People's Republic of ChinaApproval: Ministry of Construction of the People's Republic of ChinaEffective Date: March 1, 19971996
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Notice on the Release of the National Standard "Construction and Acceptance Specifications for Automatic Sprinkler Fire Extinguishing Systems"
Jianbiao [1996] No. 527
According to the requirements of the State Planning Commission's Document No. [1990] 160, the "Construction and Acceptance Specifications for Automatic Sprinkler Fire Extinguishing Systems" jointly formulated by the Ministry of Public Security and relevant departments has been reviewed by relevant departments. The "Construction and Acceptance Specifications for Automatic Sprinkler Fire Extinguishing Systems" GB50261—96 is now approved as a mandatory national standard and will be implemented on March 1, 1997.
This specification is managed by the Ministry of Public Security, and its specific interpretation and other work is the responsibility of the Sichuan Fire Science Research Institute of the Ministry of Public Security, and its publication and distribution is organized by the Standard and Quota Research Institute of the Ministry of Construction.
Ministry of Construction of the People's Republic of China
September 2, 1996
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Construction Preparation
4 Installation and Construction of Water Supply Facilities
4.1 General Provisions
4.2 Installation of Fire Pumps and Pressure Stabilizing Pumps
4.3 Installation of Fire Water Tanks and Construction of Fire Pools 4.4 Installation of Fire Pressure Water Supply Equipment|| tt||4.5 Installation of fire pump coupling
5 Installation of pipe network and system components
5.1 Installation of pipe network
5.2 Installation of sprinkler
5.3 Installation of alarm valve group
5.4 Installation of other components
System pressure test and flushing
General provisions...
6.2 Water pressure test
6.3 Air pressure test...
6.4 Flushing
7 System commissioning||tt ||7.1 General provisions
7.2 Debugging contents and requirements
8 System acceptance
9 Maintenance management
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(10)
(13)
(15)
(17)
Engineering construction standard full text information system
Appendix A
Appendix B
Appendix C||tt ||Appendix D
Appendix E
Appendix F
Automatic sprinkler fire extinguishing system pressure test record
（25）
Automatic sprinkler fire extinguishing system pipe network flushing record Automatic sprinkler fire extinguishing system linkage test record……Automatic sprinkler fire extinguishing system acceptance form
Automatic sprinkler fire extinguishing system maintenance management work list Explanation of terms used in this specification
Additional instructions
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（30)
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1 General Provisions
1. This specification is formulated to ensure the construction quality and usage function of the automatic sprinkler fire extinguishing system (or system for short), reduce fire hazards, and protect personal and property safety. 2 This specification applies to the construction, acceptance and maintenance management of automatic sprinkler fire extinguishing systems installed in buildings and structures.
3 In addition to implementing the provisions of this specification, the construction, acceptance and maintenance management of automatic sprinkler fire extinguishing systems shall also comply with the provisions of relevant national standards and specifications in force. Engineering Construction Standards Full-text Information System
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2 Terminology
2.0.1 Pre-operating condition of prepare operating automatic sprinkler fire extinguishing system The equipment performance and use conditions meet the relevant technical requirements, and the state in which it can immediately operate and spray water to extinguish the fire in the event of a fire. 2.0.2 System components system components A general term for special products such as sprinkler heads, alarm valves, hydraulic alarms, pressure switches, and water flow indicators that make up the automatic sprinkler fire extinguishing system. 2.0.3 Equipment for supervisory and alarm control services
Devices that monitor certain parts of the automatic sprinkler system and can send out control signals and alarm signals.
2.0.4 Pressure maintenance pumps A special water pump that can keep the pressure of the automatic sprinkler system within the designed working pressure range.
2.0.5 Sprinkler guards and shields A special cover that protects the sprinkler from mechanical damage during use but does not affect the action of the sprinkler or the performance of water spraying.
2.0.6 Methods of hydropneumatic flushing A method that uses compressed air formed by special equipment to drive a certain amount of water to flow from the end of the water distribution branch pipe to the water distribution pipe in the opposite direction, so as to flush out the blockage from the bottom outlet of the water distribution main pipe.
2.0.7 End water test equipment is installed at the end of the system pipe network or the partition pipe network to test the system water supply pressure, flow, alarm or linkage function.
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Construction Preparation
3.0.1 The construction of the automatic sprinkler fire extinguishing system shall be undertaken by a construction team that has passed professional training, passed the assessment, and has been reviewed and approved. 3.0.2 The following conditions shall be met before the construction of the automatic sprinkler fire extinguishing system: 3.0.2.1 The equipment plan layout, system diagram, installation diagram and other construction drawings and related technical documents shall be complete;
3.0.2.2 The design unit shall conduct technical disclosure to the construction unit; 3.0.2.3 The system components, pipe fittings and other equipment and materials shall be able to ensure normal construction;
3.0.2.4 The water, electricity and gas used at the construction site and during construction shall meet the construction requirements, and continuous construction shall be guaranteed.
3.0.3 Before the construction of the automatic sprinkler fire extinguishing system, the system components, pipes and other equipment and materials used shall be inspected on site and shall meet the following requirements: 3.0.3.1 The system components, pipes and other equipment and materials shall meet the design requirements and the provisions of the relevant national standards in force and shall have a factory certificate; 3.0.3.2 The main system components such as sprinkler heads, alarm valves, pressure switches, water flow indicators, etc. shall be inspected and qualified by the National Fire Products Quality Supervision and Inspection Center. 3.0.4 The appearance of pipes and fittings shall be inspected on site and shall meet the following requirements: 3.0.4.1 The surface shall be free of cracks, shrinkage holes, slag inclusions, folds and heavy skin; 3.0.4.2 The threaded sealing surface shall be complete, undamaged and free of burrs; 3.0.4.3 The galvanized layer on the inner and outer surfaces of galvanized steel pipes shall not fall off or rust;
3.0.4.4 Non-metallic sealing gaskets shall be flexible, free of aging, deterioration or stratification, and the surface shall be free of defects such as folds and wrinkles; 3.0.4.5 The flange sealing surface shall be complete and smooth, without burrs and radial grooves; the threads of threaded flanges shall be complete and undamaged. 3.0.5 On-site inspection of nozzles shall meet the following requirements: 3.0.5.1 The model and specifications of nozzles shall meet the design requirements; 3.0.5.2 The trademark, model, nominal operating temperature, manufacturer and production year and month of the nozzle should be complete;bzxz.net
3.0.5.3 The appearance of the nozzle should be free of processing defects and mechanical damage;3.0.5.4 The threaded sealing surface of the nozzle should be free of scars, burrs, missing or broken wires;3.0.5.5 The closed nozzle should be tested for sealing performance, and it is qualified if there is no leakage and no damage. The number of tests should be randomly checked from each batch. 1%, but not less than 5, the test pressure should be 3.0MPa, and the test time should not be less than 3min. When there are two or more unqualified nozzles, the batch of nozzles shall not be used. When only one is unqualified, 2% should be randomly checked again, but not less than 10. Re-test the sealing performance. If there are still unqualified ones, the batch of nozzles shall not be used.
3.0.6 The on-site inspection of valves and their accessories shall meet the following requirements: 3.0.6.1 The model and specification of the valve shall meet the design requirements; 3.0.6.2 The valve and its accessories shall be fully equipped and shall not have processing defects and mechanical damage;
3.0.6.3 In addition to the trademark, model, specification and other marks, the alarm valve shall also have a permanent mark of the water flow direction;
3.0.6.4 The valve disc and operating mechanism of the alarm valve and control valve shall be flexible and free of jamming, and the valve body shall be clean and free of foreign matter; 3.0.6.5 The hammer of the hydraulic alarm bell shall rotate flexibly without obstruction; 3.0.6.6 The alarm valves shall be tested for leakage one by one. The test pressure shall be twice the rated working pressure and the test time shall be 5 minutes. There shall be no leakage at the valve disc. 3.0.7 Pressure switches, water flow indicators and automatic monitoring devices such as water level, air pressure, and valve limit should have clear nameplates, safety operation instructions and product manuals; water flow indicators should also have permanent marks for the direction of water flow. The main functions should be checked one by one before installation, and those that fail to meet the standards shall not be used.
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Installation and Construction of Water Supply Facilities
4.1 General Provisions
4.1.1 When installing water supply facilities such as fire pumps, fire water tanks, fire pools, fire air pressure water supply equipment, fire pump connectors, and their ancillary pipelines, the internal dirt and debris should be removed. When the installation is interrupted, the mouth should be closed. 4.1.2 When installing water supply facilities, the ambient temperature should not be lower than 5°C. 4.2 Installation of fire pumps and pressure-stabilizing pumps
4.2.1 The installation of fire pumps and pressure-stabilizing pumps shall comply with the relevant provisions of the current national standard "Specifications for Construction and Acceptance of Mechanical Equipment Installation Engineering". 4.2.2 The specifications and models of fire pumps and pressure-stabilizing pumps shall comply with the design requirements, and shall have product certificates and installation and operating instructions. 4.2.3 When there are no design requirements, a check valve and a pressure gauge shall be installed on the outlet pipe of the fire pump, and a drain valve for inspection and water testing shall be installed. A pressure gauge and a pressure relief valve shall also be installed on the main outlet pipe of the fire pump group; a buffer device shall be added when installing the pressure gauge. A plug valve shall be installed between the pressure gauge and the buffer device. The range of the pressure gauge shall be 2 to 2.5 times the working pressure.
4.2.4 The installation of the suction pipe and its accessories shall comply with the following requirements: 4.2.4.1 The control valve on the suction pipe shall be installed after the fire pump is fixed on the foundation. Its diameter shall not be less than the diameter of the fire pump suction port, and a butterfly valve shall not be used;
4.2.4.2 When the fire pump and the fire pool are located on two independent foundations and are rigidly connected to each other, a flexible connecting pipe shall be added to the suction pipe; 4.2.4.3 There shall be no air pockets or air leakage on the horizontal section of the suction pipe. Engineering Construction Standard Full-text Information System
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Fire Water Tank Installation and Fire Water Tank Construction
4.3.1 The construction and installation of fire pools and fire water tanks shall comply with the relevant provisions of the current national standard "Construction and Acceptance Code for Water Supply and Drainage Structures". 4.3.2 The volume and installation position of the fire water tank shall meet the design requirements. During installation, the width of the main passage between fire water tanks should not be less than 1.0m. Inspection passages should be set around the steel plate fire water tank, and their width should not be less than 0.7m; the distance from the top of the fire water tank to the floor or the bottom of the beam should not be less than 0.6m.
4.3.3 The overflow pipe and drain pipe of the fire water pool and fire water tank shall not be directly connected to the drainage system of production or domestic water.
4.3.4 When the pipeline passes through the reinforced concrete fire water tank or fire water pool, a waterproof casing should be added; flexible joints should be added to the vibrating pipeline. The connection between the joints of the water inlet and outlet pipes and the steel plate fire water tank should be welded, and the welding place should be treated with rust prevention. 4.4 Installation of fire pressure water supply equipment
4.4.1 The volume, air pressure, water level and working pressure of the pressure tank of the fire pressure water supply equipment shall meet the design requirements.
4.4.2 The installation of safety valves, pressure gauges, drain pipes, water level indicators, etc. on fire-fighting air pressure water supply equipment shall comply with the requirements of the product manual. 4.4.3 The installation position, inlet and outlet pipe directions of fire-fighting air pressure water supply equipment shall comply with the design requirements. During installation, maintenance passages shall be set up around it, and its width shall not be less than 0.7m. The distance from the top of the fire-fighting air pressure water supply equipment to the floor or beam bottom shall not be less than 1.0m. 4.5 Installation of fire-fighting water pump couplings
4.5.1 The assembly of fire-fighting water pump couplings shall be carried out in the order of interface, body, connecting pipe, check valve, safety valve, vent pipe, and control valve. The installation direction of the check valve shall allow fire-fighting water to enter the system from the fire-fighting water pump coupling. 4.5.2 The installation of fire pump couplings shall comply with the following provisions: 4.5.2.1 They shall be installed on the sidewalk or non-motor vehicle driving area that is easy for fire trucks to approach. Underground fire pump couplings shall use cast iron manhole covers with the "fire pump coupling" logo, and fixed signs indicating their locations shall be set nearby; 4.5.2.3 Ground fire pump couplings shall be equipped with fixed signs that are different from fire hydrants. 4.5.2.4 The installation of wall fire pump couplings shall comply with design requirements. If there is no design requirement, the installation height should be 1.1m; the net distance from doors, windows, holes and openings on the wall should not be less than 2.0m, and they should not be installed under glass curtain walls. 4.5.3 The installation of underground fire pump couplings should ensure that the distance between the water inlet and the bottom of the manhole cover is no more than 0.4m, and should not be less than the radius of the manhole cover. 4.5.4 The masonry of underground fire pump coupling wells should meet the following requirements: 4.5.4.1 When underground fire pump coupling wells are set above the highest groundwater level, the well walls should be built with Mu7.5 bricks and M5.0 cement mortar; 4.5.4.2 When underground fire pump couplings are set below the highest groundwater level, the walls should be built with Mu7.5 bricks and M7.5 cement mortar, and the inner and outer surfaces of the well walls should be plastered with 1:2 cement mortar, and waterproofing agent should be added. The plastering thickness should not be less than 20mm, and the plastering height should be 250mm higher than the highest groundwater level. When the pipeline passes through the well wall, the gap between the pipeline and the well wall should be filled with clay and filled tightly, and M7.5 grade cement mortar should be used for plastering, and the plastering thickness should not be less than 50mm. Engineering Construction Standard Full Text Information System
W.7 Pressure switches, water flow indicators and automatic monitoring devices such as water level, air pressure, and valve limit should have clear nameplates, safe operation instructions and product manuals; water flow indicators should also have permanent marks for the direction of water flow. The main functions should be checked one by one before installation, and those that fail to meet the standards shall not be used.
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Installation and Construction of Water Supply Facilities
4.1 General Provisions
4.1.1 When installing water supply facilities such as fire pumps, fire water tanks, fire pools, fire air pressure water supply equipment, fire pump connectors, and their ancillary pipelines, the internal dirt and debris should be removed. When the installation is interrupted, the mouth should be closed. 4.1.2 When installing water supply facilities, the ambient temperature should not be lower than 5°C. 4.2 Installation of fire pumps and pressure-stabilizing pumps
4.2.1 The installation of fire pumps and pressure-stabilizing pumps shall comply with the relevant provisions of the current national standard "Specifications for Construction and Acceptance of Mechanical Equipment Installation Engineering". 4.2.2 The specifications and models of fire pumps and pressure-stabilizing pumps shall comply with the design requirements, and shall have product certificates and installation and operating instructions. 4.2.3 When there are no design requirements, a check valve and a pressure gauge shall be installed on the outlet pipe of the fire pump, and a drain valve for inspection and water testing shall be installed. A pressure gauge and a pressure relief valve shall also be installed on the main outlet pipe of the fire pump group; a buffer device shall be added when installing the pressure gauge. A plug valve shall be installed between the pressure gauge and the buffer device. The range of the pressure gauge shall be 2 to 2.5 times the working pressure.
4.2.4 The installation of the suction pipe and its accessories shall comply with the following requirements: 4.2.4.1 The control valve on the suction pipe shall be installed after the fire pump is fixed on the foundation. Its diameter shall not be less than the diameter of the fire pump suction port, and a butterfly valve shall not be used;
4.2.4.2 When the fire pump and the fire pool are located on two independent foundations and are rigidly connected to each other, a flexible connecting pipe shall be added to the suction pipe; 4.2.4.3 There shall be no air pockets or air leakage on the horizontal section of the suction pipe. Engineering Construction Standard Full-text Information System
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Fire Water Tank Installation and Fire Water Tank Construction
4.3.1 The construction and installation of fire pools and fire water tanks shall comply with the relevant provisions of the current national standard "Construction and Acceptance Code for Water Supply and Drainage Structures". 4.3.2 The volume and installation position of the fire water tank shall meet the design requirements. During installation, the width of the main passage between fire water tanks should not be less than 1.0m. Inspection passages should be set around the steel plate fire water tank, and their width should not be less than 0.7m; the distance from the top of the fire water tank to the floor or the bottom of the beam should not be less than 0.6m.
4.3.3 The overflow pipe and drain pipe of the fire water pool and fire water tank shall not be directly connected to the drainage system of production or domestic water.
4.3.4 When the pipeline passes through the reinforced concrete fire water tank or fire water pool, a waterproof casing should be added; flexible joints should be added to the vibrating pipeline. The connection between the joints of the water inlet and outlet pipes and the steel plate fire water tank should be welded, and the welding place should be treated with rust prevention. 4.4 Installation of fire pressure water supply equipment
4.4.1 The volume, air pressure, water level and working pressure of the pressure tank of the fire pressure water supply equipment shall meet the design requirements.
4.4.2 The installation of safety valves, pressure gauges, drain pipes, water level indicators, etc. on fire-fighting air pressure water supply equipment shall comply with the requirements of the product manual. 4.4.3 The installation position, inlet and outlet pipe directions of fire-fighting air pressure water supply equipment shall comply with the design requirements. During installation, maintenance passages shall be set up around it, and its width shall not be less than 0.7m. The distance from the top of the fire-fighting air pressure water supply equipment to the floor or beam bottom shall not be less than 1.0m. 4.5 Installation of fire-fighting water pump couplings
4.5.1 The assembly of fire-fighting water pump couplings shall be carried out in the order of interface, body, connecting pipe, check valve, safety valve, vent pipe, and control valve. The installation direction of the check valve shall allow fire-fighting water to enter the system from the fire-fighting water pump coupling. 4.5.2 The installation of fire pump couplings shall comply with the following provisions: 4.5.2.1 They shall be installed on the sidewalk or non-motor vehicle driving area that is easy for fire trucks to approach. Underground fire pump couplings shall use cast iron manhole covers with the "fire pump coupling" logo, and fixed signs indicating their locations shall be set nearby; 4.5.2.3 Ground fire pump couplings shall be equipped with fixed signs that are different from fire hydrants. 4.5.2.4 The installation of wall fire pump couplings shall comply with design requirements. If there is no design requirement, the installation height should be 1.1m; the net distance from doors, windows, holes and openings on the wall should not be less than 2.0m, and they should not be installed under glass curtain walls. 4.5.3 The installation of underground fire pump couplings should ensure that the distance between the water inlet and the bottom of the manhole cover is no more than 0.4m, and should not be less than the radius of the manhole cover. 4.5.4 The masonry of underground fire pump coupling wells should meet the following requirements: 4.5.4.1 When underground fire pump coupling wells are set above the highest groundwater level, the well walls should be built with Mu7.5 bricks and M5.0 cement mortar; 4.5.4.2 When underground fire pump couplings are set below the highest groundwater level, the walls should be built with Mu7.5 bricks and M7.5 cement mortar, and the inner and outer surfaces of the well walls should be plastered with 1:2 cement mortar, and waterproofing agent should be added. The plastering thickness should not be less than 20mm, and the plastering height should be 250mm higher than the highest groundwater level. When the pipeline passes through the well wall, the gap between the pipeline and the well wall should be filled with clay and filled tightly, and M7.5 grade cement mortar should be used for plastering, and the plastering thickness should not be less than 50mm. Engineering Construction Standard Full Text Information System
W.7 Pressure switches, water flow indicators and automatic monitoring devices such as water level, air pressure, and valve limit should have clear nameplates, safe operation instructions and product manuals; water flow indicators should also have permanent marks for the direction of water flow. The main functions should be checked one by one before installation, and those that fail to meet the standards shall not be used.
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Installation and Construction of Water Supply Facilities
4.1 General Provisions
4.1.1 When installing water supply facilities such as fire pumps, fire water tanks, fire pools, fire air pressure water supply equipment, fire pump connectors, and their ancillary pipelines, the internal dirt and debris should be removed. When the installation is interrupted, the mouth should be closed. 4.1.2 When installing water supply facilities, the ambient temperature should not be lower than 5°C. 4.2 Installation of fire pumps and pressure-stabilizing pumps
4.2.1 The installation of fire pumps and pressure-stabilizing pumps shall comply with the relevant provisions of the current national standard "Specifications for Construction and Acceptance of Mechanical Equipment Installation Engineering". 4.2.2 The specifications and models of fire pumps and pressure-stabilizing pumps shall comply with the design requirements, and shall have product certificates and installation and operating instructions. 4.2.3 When there are no design requirements, a check valve and a pressure gauge shall be installed on the outlet pipe of the fire pump, and a drain valve for inspection and water testing shall be installed. A pressure gauge and a pressure relief valve shall also be installed on the main outlet pipe of the fire pump group; a buffer device shall be added when installing the pressure gauge. A plug valve shall be installed between the pressure gauge and the buffer device. The range of the pressure gauge shall be 2 to 2.5 times the working pressure.
4.2.4 The installation of the suction pipe and its accessories shall comply with the following requirements: 4.2.4.1 The control valve on the suction pipe shall be installed after the fire pump is fixed on the foundation. Its diameter shall not be less than the diameter of the fire pump suction port, and a butterfly valve shall not be used;
4.2.4.2 When the fire pump and the fire pool are located on two independent foundations and are rigidly connected to each other, a flexible connecting pipe shall be added to the suction pipe; 4.2.4.3 There shall be no air pockets or air leakage on the horizontal section of the suction pipe. Engineering Construction Standard Full-text Information System
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Fire Water Tank Installation and Fire Water Tank Construction
4.3.1 The construction and installation of fire pools and fire water tanks shall comply with the relevant provisions of the current national standard "Construction and Acceptance Code for Water Supply and Drainage Structures". 4.3.2 The volume and installation position of the fire water tank shall meet the design requirements. During installation, the width of the main passage between fire water tanks should not be less than 1.0m. Inspection passages should be set around the steel plate fire water tank, and their width should not be less than 0.7m; the distance from the top of the fire water tank to the floor or the bottom of the beam should not be less than 0.6m.
4.3.3 The overflow pipe and drain pipe of the fire water pool and fire water tank shall not be directly connected to the drainage system of production or domestic water.
4.3.4 When the pipeline passes through the reinforced concrete fire water tank or fire water pool, a waterproof casing should be added; flexible joints should be added to the vibrating pipeline. The connection between the joints of the water inlet and outlet pipes and the steel plate fire water tank should be welded, and the welding place should be treated with rust prevention. 4.4 Installation of fire pressure water supply equipment
4.4.1 The volume, air pressure, water level and working pressure of the pressure tank of the fire pressure water supply equipment shall meet the design requirements.
4.4.2 The installation of safety valves, pressure gauges, drain pipes, water level indicators, etc. on fire-fighting air pressure water supply equipment shall comply with the requirements of the product manual. 4.4.3 The installation position, inlet and outlet pipe directions of fire-fighting air pressure water supply equipment shall comply with the design requirements. During installation, maintenance passages shall be set up around it, and its width shall not be less than 0.7m. The distance from the top of the fire-fighting air pressure water supply equipment to the floor or beam bottom shall not be less than 1.0m. 4.5 Installation of fire-fighting water pump couplings
4.5.1 The assembly of fire-fighting water pump couplings shall be carried out in the order of interface, body, connecting pipe, check valve, safety valve, vent pipe, and control valve. The installation direction of the check valve shall allow fire-fighting water to enter the system from the fire-fighting water pump coupling. 4.5.2 The installation of fire pump couplings shall comply with the following provisions: 4.5.2.1 They shall be installed on the sidewalk or non-motor vehicle driving area that is easy for fire trucks to approach. Underground fire pump couplings shall use cast iron manhole covers with the "fire pump coupling" logo, and fixed signs indicating their locations shall be set nearby; 4.5.2.3 Ground fire pump couplings shall be equipped with fixed signs that are different from fire hydrants. 4.5.2.4 The installation of wall fire pump couplings shall comply with design requirements. If there is no design requirement, the installation height should be 1.1m; the net distance from doors, windows, holes and openings on the wall should not be less than 2.0m, and they should not be installed under glass curtain walls. 4.5.3 The installation of underground fire pump couplings should ensure that the distance between the water inlet and the bottom of the manhole cover is no more than 0.4m, and should not be less than the radius of the manhole cover. 4.5.4 The masonry of underground fire pump coupling wells should meet the following requirements: 4.5.4.1 When underground fire pump coupling wells are set above the highest groundwater level, the well walls should be built with Mu7.5 bricks and M5.0 cement mortar; 4.5.4.2 When underground fire pump couplings are set below the highest groundwater level, the walls should be built with Mu7.5 bricks and M7.5 cement mortar, and the inner and outer surfaces of the well walls should be plastered with 1:2 cement mortar, and waterproofing agent should be added. The plastering thickness should not be less than 20mm, and the plastering height should be 250mm higher than the highest groundwater level. When the pipeline passes through the well wall, the gap between the pipeline and the well wall should be filled with clay and filled tightly, and M7.5 grade cement mortar should be used for plastering, and the plastering thickness should not be less than 50mm. Engineering Construction Standard Full Text Information System
W.1 The volume, air pressure, water level and working pressure of the air pressure tank of the fire-fighting air pressure water supply equipment shall meet the design requirements.
4.4.2 The installation of the safety valve, pressure gauge, drain pipe, water level indicator, etc. on the fire-fighting air pressure water supply equipment shall comply with the requirements of the product manual. 4.4.3 The installation position, water inlet pipe and outlet pipe direction of the fire-fighting air pressure water supply equipment shall meet the design requirements. During installation, an inspection channel shall be set up around it, and its width shall not be less than 0.7m. The distance from the top of the fire-fighting air pressure water supply equipment to the floor or beam bottom shall not be less than 1.0m. 4.5 Installation of fire-fighting water pump coupling
4.5.1 The assembly of the fire-fighting water pump coupling shall be carried out in the order of interface, body, connecting pipe, check valve, safety valve, vent pipe and control valve. The installation direction of the check valve shall enable the fire-fighting water to enter the system from the fire-fighting water pump coupling. 4.5.2 The installation of fire pump couplings shall comply with the following provisions: 4.5.2.1 They shall be installed on the sidewalk or non-motor vehicle driving area that is easy for fire trucks to approach. Underground fire pump couplings shall use cast iron manhole covers with the "fire pump coupling" logo, and fixed signs indicating their locations shall be set nearby; 4.5.2.3 Ground fire pump couplings shall be equipped with fixed signs that are different from fire hydrants. 4.5.2.4 The installation of wall fire pump couplings shall comply with design requirements. If there is no design requirement, the installation height should be 1.1m; the net distance from doors, windows, holes and openings on the wall should not be less than 2.0m, and they should not be installed under glass curtain walls. 4.5.3 The installation of underground fire pump couplings should ensure that the distance between the water inlet and the bottom of the manhole cover is no more than 0.4m, and should not be less than the radius of the manhole cover. 4.5.4 The masonry of underground fire pump coupling wells should meet the following requirements: 4.5.4.1 When underground fire pump coupling wells are set above the highest groundwater level, the well walls should be built with Mu7.5 bricks and M5.0 cement mortar; 4.5.4.2 When underground fire pump couplings are set below the highest groundwater level, the walls should be built with Mu7.5 bricks and M7.5 cement mortar, and the inner and outer surfaces of the well walls should be plastered with 1:2 cement mortar, and waterproofing agent should be added. The plastering thickness should not be less than 20mm, and the plastering height should be 250mm higher than the highest groundwater level. When the pipeline passes through the well wall, the gap between the pipeline and the well wall should be filled with clay and filled tightly, and M7.5 grade cement mortar should be used for plastering, and the plastering thickness should not be less than 50mm. Engineering Construction Standard Full Text Information System
W.1 The volume, air pressure, water level and working pressure of the air pressure tank of the fire-fighting air pressure water supply equipment shall meet the design requirements.
4.4.2 The installation of the safety valve, pressure gauge, drain pipe, water level indicator, etc. on the fire-fighting air pressure water supply equipment shall comply with the requirements of the product manual. 4.4.3 The installation position, water inlet pipe and outlet pipe direction of the fire-fighting air pressure water supply equipment shall meet the design requirements. During installation, an inspection channel shall be set up around it, and its width shall not be less than 0.7m. The distance from the top of the fire-fighting air pressure water supply equipment to the floor or beam bottom shall not be less than 1.0m. 4.5 Installation of fire-fighting water pump coupling
4.5.1 The assembly of the fire-fighting water pump coupling shall be carried out in the order of interface, body, connecting pipe, check valve, safety valve, vent pipe and control valve. The installation direction of the check valve shall enable the fire-fighting water to enter the system from the fire-fighting water pump coupling. 4.5.2 The installation of fire pump couplings shall comply with the following provisions: 4.5.2.1 They shall be installed on the sidewalk or non-motor vehicle driving area that is easy for fire trucks to approach. Underground fire pump couplings shall use cast iron manhole covers with the "fire pump coupling" logo, and fixed signs indicating their locations shall be set nearby; 4.5.2.3 Ground fire pump couplings shall be equipped with fixed signs that are different from fire hydrants. 4.5.2.4 The installation of wall fire pump couplings shall comply with design requirements. If there is no design requirement, the installation height should be 1.1m; the net distance from doors, windows, holes and openings on the wall should not be less than 2.0m, and they should not be installed under glass curtain walls. 4.5.3 The installation of underground fire pump couplings should ensure that the distance between the water inlet and the bottom of the manhole cover is no more than 0.4m, and should not be less than the radius of the manhole cover. 4.5.4 The masonry of underground fire pump coupling wells should meet the following requirements: 4.5.4.1 When underground fire pump coupling wells are set above the highest groundwater level, the well walls should be built with Mu7.5 bricks and M5.0 cement mortar; 4.5.4.2 When underground fire pump couplings are set below the highest groundwater level, the walls should be built with Mu7.5 bricks and M7.5 cement mortar, and the inner and outer surfaces of the well walls should be plastered with 1:2 cement mortar, and waterproofing agent should be added. The plastering thickness should not be less than 20mm, and the plastering height should be 250mm higher than the highest groundwater level. When the pipeline passes through the well wall, the gap between the pipeline and the well wall should be filled with clay and filled tightly, and M7.5 grade cement mortar should be used for plastering, and the plastering thickness should not be less than 50mm. Engineering Construction Standard Full Text Information System
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