I would like to ask questions regarding the piping for fire water
Thread Content
Recently, while looking at the piping diagrams for the fire suppression system, I noticed that many of the pipes are curved. For example, they come up from underground (where the main pipes are buried), and they don’t turn upward right away at a bend; instead, they move horizontally for a distance first, then pass through two bends in a horizontal direction before going upward. What’s the logic behind this? I think the resistance of fire hoses should be minimized, and there should be as few fittings such as elbows as possible (of course, those that are necessary must be used); is that correct? Also: What are the other requirements for the piping of fire hoses?
From the perspective of fire protection pipeline requirements, what the original poster mentioned doesn’t make sense. It’s worth checking whether there are other reasons for the pipes to change direction, such as obstacles on the floor that occasionally block them. According to the regulations regarding fire protection water pipelines, there is no requirement to minimize resistance, as the fire protection system operates under high pressure and the medium used is water. There are also some unified requirements, which are summarized as follows: The process equipment should be equipped with an independent high-pressure fire protection water supply system, with a pressure of 0.8–1.2 MPa being appropriate ； The fire water supply pipes should be arranged in a circular pattern and divided into several sections using valves ； When an accident occurs in a certain circular pipeline, the remaining independent circular pipelines should be able to handle 100% of the fire-fighting water demand ； Underground fire water pipes should be buried at a depth of ≥150 mm below the freezing line ； The flow velocity in the independent fire water supply pipeline should not exceed 5 m/s.
Agree with the view on the second floor. The specific piping should be determined based on the particular circumstances.