what is the specific application for the following sprinkler :
1. pendent and upright sprinkler.
2. early suppression fast response sprinkler.
3. quick response sprinkler.
4. residential sprinkler.
1. pendent and upright sprinkler - they do the same job but if you have dry system (installation initially filled with air or other inert gas) for example, only upright sprinklers may be allowed. there are exceptions from this but you should know there are also sidewall sprinklers. Common in hotel rooms for example
2. early suppression fast response sprinkler. - storage aplications, high performance sprinklers.
3. quick response sprinkler - whenever NFPA suggests it, you use it. You can use quick or normal response instead which affects the fire scenario. Basicaly you want your sprinklers work asap but in certain aplications it's allowed to use normal response. There is no big difference between quick and normal response - several dozens of miliseconds. Bulb in quick response is 3 mm, normal 5 mm - you can find also 4 mm bulbs which are called special response, something between quick and normal, that can be designed in accordance with some European standards or the requirements of authority having jurisdiction.
4. residential sprinkler - residential applications. relatively small sprinklers, comparing to Early Suppression Fast Response - 4 to 9 times smaller
I think that in dry systems, only dry pendent sprinkler is approved.
What is your opinion ?
yes, agree. that's why I wrote "may be" this is because water could freeze in this short vertical pipe. note that if your sprinkler is in heated place, standard pendent sprinkler may be allowed. this is not common to see dry systems in heated places though
So, please when i decide to use quick response sprinkler & early suppression fast response sprinkler ?
we dont use ESFR on dry systems, but we have listed DRY ESFR sprinklers for cold rooms that we use on wet systems.
quick response sprinklers on dry-system are lets say risky. everything depends on water delivery time. using normal response sprinklers is recommended cause you basically dont want to open more sprinklers than you calculated.
almost every test performed with quick response sprinklers say, they are better. also SFPA tests that were comparing normal response and quick response sprinklers in 2002 Advances in Sprinkler Technology - SFPE
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