A Study on the Evaluation of Simulation and Performance Test for the Development of High Pressure Hose

Abstract

In case of high rise building and tunnel fires, it is difficult for the fire truck to access the site due to road conditions and other barriers with the difficult access to the fire source owing to the heat of fire. This reason requires the long-distance water release for the fire fighting from the outside with the necessity for deployment of dozens of hoses accordingly. For that kind of fire fighting, the water release with high pressure in the fire fighting pump truck is required, and the development of the high pressure hose is imminent. In this thesis, simulation was done to decide the roughness and weaving types of the internal skin of the hose to develop the high pressure hose with the mathematical calculations done to compute the pressure drop occurring from the friction loss in case of the long-distance water release. Moreover, the connection position of the relay pump was analyzed for the use below the standard pressure. The computation in the analysis shows that the relay pump is needed if the fire fighting truck supplies the fire fighting water with 0.7 MPa beyond the distance of about 1.3 km. Additionally, the target test standards, which are not available in the domestic regulations, on the type approval and product inspection of a fire hose were prepared for performance verification with the performance test done to meet all the standards such as the rupture pressure test. Keywords: Longitudinal Tunnel, High Pressure Hose, Performance Criteria of Hose, Fire Fighting Pump Truck