In a message dated 6/22/2005 10:56:15 A.M. Central Standard Time, [EMAIL PROTECTED] writes:
Both Halon (which was bad for the Ozone layer) and a more environmentally friendly replacement 1,1,1,2,3,3,3-heptafluoro-propane (manufactured under names such as HFC-227ea, FM-200, FE-227) have a minimum concentration at which they will suppress fires, and a higher concentration at which they become toxic. If I remember correctly, the size of the effective, nontoxic range is not that large, and smaller for Halon than HFC-227ea. IF the fire suppression system is properly >> There's a Federal tax of $45/lb on Halon in the US. This is to encourage alternatives. Before we could get changed out our Halon provider hit the discharge button instead of the test button and blew out the ceiling tiles in the print shop. Just got it cleaned up good and recertified and danged if the welders down the hall let it all cut loose and the the ventilation system sucked it in threw an open window(for special forms don't ya know) and blew it out again. The low bid on a replacement was a water mist system and just couln't get past the water and elctricity don't mix. Still Halon, although with recycled mix it's down to about $42/lb no tax. There was a field replacement of blue for brown(tan really) bus and tags that IBM did for upgrades and replacements. The blue evidently react with Halon to produce a carcinogen in a real fire. Everything went to brown except a couple of 3088s and they couldn't find any short browns anywhere.... ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
