As another example, I am working on a mill conversion and the
building and sprinkler system are from 1904. When we changed the 3/4"
pipe, the internal looked like new pipe. This had been a wet system,
but was fed by river water. Go figure.
At 07:41 PM 1/25/2008, you wrote:
I agree Tom. Here is what I plan to respond unless I hear words of
wisdom from you guys.
One must accept the fact that there are variables which affect
the life of a sprinkler system. They include:
Proper original design and installation
Proper inspection and testing
Whether they are wet, dry, preaction or antifreeze
Environmental conditions, like salt air, high humidity, corrosive
atmosphere.
Presence of microbiologically induced corrosion (MIC)
Type of pipe, Schedule 40, thinner wall pipe, galvanized pipe, plastic pipe
Corrosive nature of the water
Earthquake
A new or existing wet pipe system which has been tested free of
the conditions leading to MIC, and is properly maintained, can
pretty much be expected to last for the life of the
building. Examples of this are the sprinkler systems at The
Presidio and Fort Mason in San Francisco. I know the system at the
Headquarters Building at Upper Fort Mason is in the neighborhood of
70 years old. I took apart portions of another 70 year-old
sprinkler system in San Francisco, during a building
demolition. The exterior and interior of the pipe was like brand new.
Dry pipe systems do not have such a good history, mostly because
of internal corrosion. I know of no statistics, but would expect
at 30 to 40 years.
Antifreeze systems will not get proper maintenance, so it is
anybody's guess.
Other fire extinguishing systems will likely have shorter lives,
partly due to obsolescence.
Tom Duross <[EMAIL PROTECTED]> wrote:
That's kinda like asking how long is a piece of string Ed.
Tom
Go Pats
eBay
At 06:39 PM 1/25/2008, you wrote:
>Here is a question I was asked today:
> "Where can I find a list that indicates the Estimated Design life
> for a fire
>suppression/sprinkler system?
>
> What say ye?
>
>
>Ed Vining
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Ed Vining
4819 John Muir Rd
Martinez CA 94553
925-228-8792
[EMAIL PROTECTED]
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Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
www.fpdc.com
860.535.2080
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