In case you missed any of the previous posts in the Vehicle Fire Suppression Basics series…
Part 6 of 8: Nozzle Coverage and Location
Having identified the fire hazards and areas which require protection, the next step is to determine the number of discharge nozzles needed and where they should be placed to provide the best coverage. This is where the expertise of the fire suppression system designer and installer comes in.
Key Nozzle Considerations
When using any nozzles, it is critical to ensure that obstructions do not interfere with the discharge pattern. However, obstructions that are unavoidable can often be overcome by installing additional nozzles in different locations to ensure complete coverage.
Nozzles must be fitted with blow-off caps to prevent debris such as wood chippings or coal dust entering and clogging the nozzle. When the system is activated, the pressure exerted by the extinguishing agent will remove these caps and begin discharge.
It is important to remember that different models of nozzle will vary in their discharge patterns. This allows system designers to avoid wasting any agent and provide coverage specific to the shape and size of the hazard area.
When selecting nozzles and nozzle locations, the following rules apply:
After completing a hazard analysis and having established nozzle type, quantity and location, the type and quantity of extinguishing agent tanks can be determined. The amount of extinguishing agent should be sufficient to provide each nozzle with the correct flow rate. We will look further into this area in the blog post.
Next blog post in the Vehicle Fire Suppression Basics series: Extinguishing Agent Quantity Requirements
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