I've not been able to obtain any idea of the relative frequencies of MIC and ESF incidents, either to themselves or in total # of systems.
However, its prudent to take precautions because: While the chances of getting eaten by a lion while walking down Main St are one in a million; Once is enough. glc -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Bill Brooks Sent: Monday, March 15, 2010 8:17 AM To: [email protected] Subject: RE: MIC How did you locate MDE? Are you suggesting them because of the need to test the sludge or because they provide services to test the drinking water? Is condensate water different than drinking water in attacking the dry system piping? I suppose it could be since this water is being extracted from the air and might be influenced by the compressor system. A couple months ago I made some calls and wound up speaking to someone at Potter (also a source for testing services). There's also Huguenot Labs, an advertiser in the AFSA magazine. What I learned from Potter is there is no standardized test for MIC, and that laboratory results can differ because of this. My first reaction to one of these reports was that it was nothing but a sales approach to water treatment. However, as I understand more it seems we should be looking to water treatment as a mandatory long-term design method. The client I was serving also saw the sales method before seeing the technical solution embedded in it. In my experience, the water quality test available from the local water company does not provide the necessary information. Bill Brooks William N. Brooks, P.E. Brooks Fire Protection Engineering Inc. 372 Wilett Drive Severna Park, MD 21146-1904 410-544-3620 410-544-3032 FAX 412-400-6528 Cell -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Sunday, March 14, 2010 11:10 PM To: Travis Mack, SET; [email protected] Subject: Re: MIC Go to mde.com for the testing. Sent from my Verizon Wireless Phone ----- Reply message ----- From: "Travis Mack, SET" <[email protected]> Date: Sun, Mar 14, 2010 7:31 PM Subject: MIC To: <[email protected]> Doesn't the main have to be pitched? 8.15.2.3.1 Dry Pipe Systems in Non-Refrigerated Areas. In dry pipe systems branch lines shall be pitched at least 1/2 in. per 10 ft (4 mm/m) and mains shall be pitched at least 1/4 in. per 10 ft (2 mm/m). I think the contractor was confused between preaction and dry systems. It used to be that a preaction system in a heated area did not have to be pitched. However, as long as I can remember, dry systems have been pitched. On 3/14/2010 1:57 PM, Jay Jay Blocker wrote: > I have a scenario I would like some input on. We have a property with five buildings all five buildings are five stories tall with dry systems in the attics. 4 inch schedule 10 main with Tyco attic heads on 1.25 inch sprigs. 4 of the buildings have all the main and sprigs in the attic with only the supply and the drum drips in the heated floor below. Building five has the 4 inch main hung in the hall way below with 10 foot sprigs penetrating the rated ceiling into the attic. NO pitch on any of the main. I have not seen a dry system done this way before but can not seem to find anything that says it cant be done this way. (13-2002) Any input on this arrangement? > > The issue I am having is the 4 inch pipe is developing pinhole leaks at only 18 months of service. Upon replacement of a section of pipe a sludge about 1 inch thick was discovered as well as large amounts of water. I know the pitching will correct the draining of the water but our concern was where the water was coming from. The installing contractor told the customer "Idid you a favor to keep your main from freezing." The question was asked if it was possible that all the sprigs being in the cold area and the main in the dry could be the cause for the excess water (condensation). Also is there any place I can send a sample of the sludge to get it tested for possibility of MIC? > > Thanks for the help. > > Jeremy Blocker > EFPS > (303) 353-9712 > > > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > > For Technical Assistance, send an email to: [email protected] > > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) > _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
