Technical analysis and optimization strategies for static pressure zoning at fire hydrant outlets in fire water supply systems
This study compares and analyzes the differences between Chinese and American fire water supply systems,and delves into the underlying reasons for the static pressure zoning regula-tions at fire hydrant outlets in the Technical code for fire water supply and hydrant systems(GB 50974-2014).Using case analysis method,the pressure variations at the lowest fire hydrant out-lets in fire water supply systems under different building heights and system configurations were investigated.Results show that:the 1.0 MPa limit for static pressure at fire hydrant outlets may lead to overpressure damage risks in temporary high-pressure systems under certain circumstances;the regulation that sets the design pressure of pressure stabilizing pumps in temporary high-pres-sure fire water supply systems as the fire pump's zero-flow head plus 0.10 MPa is unreasonable.Based on these findings,improvements to the criteria for fire hydrant system zoning and reevalu-ation of the set values for pressure stabilizing pump design pressure are proposed.
Fire hydrant systemStatic pressure at fire hydrant outletPressure stabilizing pump design pressureNFPA
NETL
NSTL
万方数据
