Análise comparativa do dimensionamento de uma rede de hidrantes conforme as normas de 3 estados brasileiros sobre uma mesma edificação modelo

Abstract

This study presents a comparative analysis of the design of a fire hydrant network for a single model building, intended for commercial use with LPG storage, in light of the applicable standards of three Brazilian states: Paraná, Santa Catarina and Rio Grande do Sul. First, the theoretical foundations of active fire protection systems are discussed, with emphasis on the hydrant network and on the national and state technical standards that regulate its conception, installation and performance. Then, the building is characterized, the occupancy and fire risk classification is defined, and the design parameters required in each state are established, including criteria such as type of system, number and location of hydrants, hose type and length, minimum flow rates, fire water storage requirements and pumping conditions. The hydraulic design of the network is carried out using established methods, with verification of head losses, manometric heads and compliance with the minimum pressure and flow requirements in each regulatory scenario. Finally, the results of the three designs are compared, showing that differences among the state regulations directly affect the size of the system, the configuration of the network, the characteristics of the fire pumps and the volume of the reservoirs, with significant impacts on performance, safety and implementation costs.