Abstract: This paper discusses the application of lightweight attack hoses in internal attack firefighting operations. Through comparative tests, the performances of lightweight hoses with diameters of ϕ40, ϕ45, ϕ50 and the ϕ65 hose were analyzed in terms of water-filled dragging, water supply, and pressure loss, so as to evaluate whether they meet the requirements of internal attack firefighting. The results show that lightweight hoses have good maneuverability and can satisfy the water supply intensity demand in internal attack firefighting. Meanwhile, this paper summarizes the limitations of lightweight hoses in practical application, such as large pressure loss and easy kinking. In addition, suggestions including the unification of connectors, adoption of double-layer hoses, and priority selection of ϕ45 hoses are put forward, aiming to improve the operational efficiency of lightweight attack hoses in internal attack firefighting.

Key words: attack hose, lightweight hose, pressure loss, water supply flow, maneuverability