K25 Sprinklers in Warehouse – Effect on Connected Light Hazard Areas?

[well m]

Hi All,
Im currently learning about fire system design in Australia and looking at a case study involving a high hazard warehouse using K25.2 ESFR sprinklers at around 14.6 m ceiling height. The setup also includes connected areas like offices and amenities (light hazard) that are fed from the same system using smaller pipework.

Just wondering if anyone has come across issues with this type of arrangement?

.Could having large K-factor sprinklers on the same line as small light hazard pipework cause any operational or pressure issues?
.Any thoughts on long-term reliability or pressure spikes?
Appreciate any feedback, still getting my head around how these setups behave in the real world.

 

[cdafd]

You are only allowed one fire in a design area

Not allowed to have a fire in the office and warehouse at the same time.

If there is fire in both, something went wrong.

Guess you are looking at a fire pump ?

 

[TravisMack]

You base your system sizing and calculations on a given area of operation. You are typically going to calculate the areas separately. The premise is that the fire will not cross from one area to another and be controlled by the fire sprinkler system.

I hope you are aware that not all fire sprinklers flow at one time. Water only flows from the fire sprinklers that have the fusible element ejected due to heat.

 

[well m]

Hey guys, thanks for the replies. My main concern is the fire pump size, could pushing that much flow into the lower hazard areas with smaller pipework cause issues with excessive pressure or velocity?

 

[SprinklerDesigner2]

Per NFPA #13 ESFR sprinklers can cover Light and Ordinary Hazard areas but NOT Extra Hazard Areas.

 

[cdafd]

NFPA 13 requires automatic sprinkler system components to be rated for no less than 175 pounds per square inch (psi) or rated for the maximum system working pressure the components are exposed to, whichever is greater. Most automatic sprinkler system components are rated for a maximum pressure of 175 psi, especially sprinklers.