What Are The Material Requirements For Fire Hoses?

The main material requirements for fire-fighting pipelines are: when the working pressure of the fire-fighting water supply system is not greater than 1.2MPa, the buried pipeline part should be made of ductile iron pipe or steel mesh skeleton plastic composite pipe water supply pipe; but when the working pressure of the system is greater than 1.2MPa, it should be For seam steel pipes, the maximum working pressure of grooved pipe joints with nominal diameter DN≤250mm should not be greater than 2.5MPa, and the maximum working pressure of grooved pipe joints with nominal diameter DN≥300mm should not be greater than 1.6MPa.