This actually had a tank in the tower which I believe was filled by
the pump from the river. It was part of a hydroelectric system off
the tail race. There is no public water to the site. That pump is now
out of service and the active system is off a diesel pump and bladder
tank filled from wells. (George is familiar with the diesel). The
river pump belongs in a museum.
At 08:55 AM 1/26/2008, you wrote:
I've tested a few pumps drawing river water in CT and RI as well as MA and
found they have domestic in them off the street by way of a manual fill and
only see river water when the pump runs. Is this like that? Plus, you
don't see as good a metal product in the past 20+ years as you see in older
systems, not just pipe but pumps as well. Metallurgy has gone downhill,
domestic forges closed, quality of ore not what it used to be.
Tom
Go Pats
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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Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
www.fpdc.com
860.535.2080
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