<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">FM200 residue is mostly all of the gunk and grease in the pipes left over from their manufacture and threaded-metal-fitting assembly.<div><br></div><div>John<br><div dir="ltr"><br>On 14 Dec 2018, at 4:31 am, Bevan Slattery <<a href="mailto:bevan@slattery.net.au">bevan@slattery.net.au</a>> wrote:<br><br></div><blockquote type="cite"><div dir="ltr">
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<div style="direction: ltr;">It’s pretty much all been said.</div>
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<div style="direction: ltr;">Halon (long gone). Reaction sucks oxygen out of air.</div>
<div style="direction: ltr;">FM200 (safe but being phased out). Heard it can leave a residue despite the brochure saying not.</div>
<div style="direction: ltr;">Inergen more common (and others like it). Fundamentally mostly nitrogen that drops oxygen below 15% and drops temperature. These are two components of a fire (heat, fuel and oxygen). People can operate comfortably below 15%
oxygen. In fact at 10% you can still function more than enough to pick up your gear and leave the room.</div>
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<div style="direction: ltr;">I did quite a bit of research on reduced oxygen environments (hypoxic) which is used on (Firepass etc.) <a href="http://www.firepass.com/oxygen-reduction-fire">http://www.firepass.com/oxygen-reduction-fire</a> </div>
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<div style="direction: ltr;">Obviously dry pipe is used a lot. The issues with gas suppression today are more around noise (and vibration) and temp drop and they relate to spinning disks and circuit boards, more than people.</div>
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<div style="direction: ltr;">The issues around dry pipe is, well when it goes off, it’s not very dry and water/equipment certainly doesn’t mix.</div>
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<div style="direction: ltr;">Cheers</div>
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<div style="direction: ltr;">B</div>
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<div id="divRplyFwdMsg" dir="dir="ltr""><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> AusNOG <<a href="mailto:ausnog-bounces@lists.ausnog.net">ausnog-bounces@lists.ausnog.net</a>> on behalf of Paul Wilkins <<a href="mailto:paulwilkins369@gmail.com">paulwilkins369@gmail.com</a>><br>
<b>Sent:</b> Wednesday, December 12, 2018 3:53 pm<br>
<b>To:</b> <a href="mailto:AusNOG@lists.ausnog.net">AusNOG@lists.ausnog.net</a><br>
<b>Subject:</b> [AusNOG] [AUSNog] : Re Data Centre Fire Suppression Safety
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<div dir="ltr">Every data centre has a fire suppression system. We're not used to thinking of this as a hazardous environment, but consequent to<a href="https://www.theguardian.com/world/2018/dec/12/antarctica-two-technicians-dead-mcmurdo-station-ross-island">two
techs being found dead working on a fire suppression system in Antarctica</a>, I find myself wondering yet again, why there aren't more stringent controls around the fire suppression systems in data centres: viz - when you enter a data centre, how confident
can you be you're not going to be quietly asphyxiated?<br>
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Kind regards<br>
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Paul Wilkins<br>
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