1.0.1 This code is formulated with a view to rationally designing the fire protection water supply and hydrant systems, guaranteeing the construction quality, regulating the acceptance and maintenance management, reducing fire hazard and protecting personal and property safety.
1.0.2 This code is applicable to the design, construction, acceptance and maintenance management for fire protection water supply and hydrant systems of newly-built, extended and rebuilt industrial, civil and municipal construction projects.
1.0.3 Design, construction, acceptance and maintenance management of fire protection water supply and hydrant systems shall comply with the relevant national policy and guideline. Effective technical measures shall be taken in combination with engineering characteristics to achieve safety and reliability, advanced technology, economic suitability and environmental protection.
1.0.4 Components and equipment of fire protection water supply and hydrant systems adopted for project shall be those meeting the requirements of current relevant national standard and access system.
1.0.5 Design, construction, acceptance and maintenance management of fire protection water supply and hydrant systems shall not only comply with the requirements stipulated in this code, but also comply with those in the current relevant national standard.
2 Terms and Symbols
2.1 Terms
2.1.1 Fire water
Water source supplying fire water for water fire extinguishing facilities, vehicle-mounted or portable fire pumps and fixed fire pumps, including municipal water supply, fire reservoir, gravity fire reservoir and natural water.
2.1.2 Constant high pressure fire protection water supply system
Water supply system constantly maintaining the required operating pressure and flow of water fire extinguishing facilities, and conducting direct pressurization without fire pump in case of fire.
2.1.3 Temporary high pressure fire protection water supply system
Water supply system which fails to meet the required operating pressure and flow of water fire extinguishing facilities at original times, but automatically starts the fire pump to meet the required operating pressure and flow in case of fire.
2.1.4 Low pressure fire protection water supply system
Water supply system meeting the required operating pressure and flow for water intaking of vehicle-mounted or portable fire pumps.
2.1.5 Fire reservoir
Man-built water storage facilities for water absorption of fixed or movable fire pumps.
2.1.6 Gravity fire reservoir
Water storage facility arranged in high place and directly providing gravity water supply for fire extinguishing facility.
2.1.7 Elevated/gravity fire tank
Water storage facility arranged in high place and directly providing fire demand of fire extinguishing facility in initial fire hazard.
2.1.8 Hydrant systems/standpipe and hose systems
A system consisting of water supply facility, hydrant, water distribution network and valve.
2.1.9 Wet hydrant system/wet standpipe system
Water distribution network hydrant system filled with water at original times.
2.1.10 Dry hydrant system/dry standpipe system
Water distribution network hydrant system which is not filled at original times but filling water to water distribution network in case of fire.
2.1.11 Static pressure
The pressure of pipeline at a certain point where the water in pipe network of fire protection water supply system is static hereinafter referred to as static pressure.
2.1.12 Residual/running pressure
The difference between the total pressure and velocity pressure of pipeline at a certain point where the water in pipe network of fire protection water supply system is flowing, hereinafter referred to as running pressure.
2.2 Symbols
A - the sectional area of fire reservoir inlet pipe;
