Abstract: The flow characteristics of the pipe network of the perfluorophenone fire extinguishing system have an important influence on the time and state of the fire extinguishing agent injection, which in turn affects the fire extinguishing efficiency of the whole system. In this paper, a fluid mechanics model has been adopted to calculate the pipe flow of the perfluorohexanone fire extinguishing system. Different stages of the pipe flow process have been analyzed qualitatively, and the important characteristic pa⁃rameters such as pipe pressure, flow rate and agent discharge time in each stage have been studied quantitatively. The study revealed the pipe flow characteristics of the perfluorohexanone fire extinguishing system, providing a theoretical basis for further engineering design and calculation of the system pipe network.

Key words: perfluorophenone, pipe network design, theoretical calculation, flow characteristics