Ed, Moire examples of long lived systems that I have seen the interiors of that show no signs of corrosion:
Buildings at the Naval Undersea Warfare Center at Keyport, WA built in 1942. The former stables for the Seattle horse drawn street car system--early Twentieth Century. A system that was converted to dry of which I have the faceplate-General Fire Company 1917. There is a system in Tacoma still in service dated 1898. Finally a 1916 Viking Tyden dry system like new. There are many more. In fact although I've seen corrosion in old pipes I've never encountered MIC in old steel. On 1/25/08, Ed Vining <[EMAIL PROTECTED]> 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 > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > > > > Ed Vining > 4819 John Muir Rd > Martinez CA 94553 > 925-228-8792 > [EMAIL PROTECTED] > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > > To Unsubscribe, send an email to:[EMAIL PROTECTED] > (Put the word unsubscribe in the subject field) > -- Ron Greenman at home.... _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
