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<DIV><FONT face=Arial size=2>Yeah, I've read about that. My conclusion was that
for most shops the risk is minimal. But in my specific case, the RH in my
central Florida shop really never gets below about 40% or 45% - and in the
winter time it sometimes goes up to 50% or 55% because I don't run the AC. I
have never gotten a static elec shock in the house - the RH just never gets low
enough. Back when I lived in Michigan, we would always get shocks in the winter
time.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>I think that if I were in a climate where I found
my shop RH dipping low in the winter, I might want to ponder this question more.
But with my very moderated and never low shop RH, I just don't think it is an
issue. I will monitor the system anyway - test for shocks and stuff - gotta
admit that if I get a shock every time I touch my piping after use, I might
think a little harder about all this. My planned piping run is fairly short, so
I'm gonna give it a go with PVC and see what shakes out.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks for the thought.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Terry Farrell</FONT></DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>Just to
follow up, because no one else did, here are just a couple of links to the
debate about PVC tubing in dust systems. You probably already know
this stuff, uh?<BR><BR><A
href="http://www.woodweb.com/knowledge_base/PVC_piping.html"
eudora="autourl">http://www.woodweb.com/knowledge_base/PVC_piping.html</A><BR><BR><A
href="http://www.rockler.com/blog/index.cfm?commentID=44"
eudora="autourl">http://www.rockler.com/blog/index.cfm?commentID=44<BR><BR><BR></A>While
there seem to be no reports of explosions resulting from static build up, all
the literature emphasizes proper grounding when using
PVC.<BR><BR><BR><BR><BR><BR>At 10:41 AM 8/8/2006, Terry Farrell wrote:<BR><BR>
<BLOCKQUOTE class=cite cite="" type="cite"><FONT size=2>And then there is
the ducting thing. I haven't got that installed yet. I spent a lot of time
trying to locate the recommended ASTM 2729 thin-wall six-inch PVC piping and
failed. To the best of my knowledge it doesn't exist! I guess I'll have to
settle for the next thicker stuff. And I haven't picked that up yet because
I haven't installed a hitch on my car to pull a trailer for the pipe
(although I did finally get a license plate for the
trailer).<BR></FONT> <BR><FONT size=2>I</FONT></BLOCKQUOTE>Regards
-<BR><BR>David Skolnik<BR><BR></BLOCKQUOTE></BODY></HTML>