[alberg30] A-30: Stinky insulation?

Joe,

I'm really glad to hear you're sailing in the Caribbean, now.  I
hated to think of you giving up that boat.

Two points of concern:
  1. galvanized pipe.  I've heard that you should use black iron
     pipe for the exhaust, as galvanized can give off toxic fumes
     from the zinc.
  2. teflon anti-sieze.  Teflon is quite toxic when overheated
     and I've heard that it will give off toxic fumes when used
     on the exhaust.

Both of these warnings are somewhat second-hand, but I think you
should give them some consideration.

 - George


> alberg30 at mindspring.com said:
> 
> Rich:
> You might be right about not enough layers. I have one layer around the
> pipe, so maybe I will add another. This wrap is about as thick as heavy
> fiberglass mat. The surrounding items are not hot to the touch but the area
> is warm. More layers, eh?
> 
> I followed the diagram of a threaded pipe system at the National Triton
> association website.  http://members.tripod.com/~suter/ajsexhaust/   It
> worked very well. It costs about $20 for the materrials, I bought the whole
> thing at Home Depot, all galavnized. Be sure to use a teflon anti-sieze
> compound on the threads.
> 
> I have a Vetus water muffler in the bottom of the port aft locker, and a
> Vetus air vent above the manifold.
> 
> Yesterday was the first time I sailed my boat after more than 4 years in the
> yard for a do-it-yourself refit. Everything worked! The rebuilt Atomic 4
> purred. Even the instruments gave accurate readings. We motor-sailed for
> about two hours from Christinasted harbor around to the St. Croix Yacht
> Club, seven miles off shore. 20knot winds from the east and 4-6foot seas.
> Very wet ride, but the boat sailed great under just a main.
> 
> Contrary to popular opinion, the mahogany bowsprit I built did not fly off
> the bow, nor the 30 lb Danforth lashed to it. I plan to add a stay
> underneath to a bow fiting so it won't get ripped off in really bad seas.
> 
> Haven't ruled out the hard doger idea yet, and still have the one I started
> two years go. Will let you know.
> 
> Joe #499
> "One Less Traveled"
> 
> 
> 
> ----- Original Message -----
> From: "Rick Leach" <rleach at mbayaq.org>
> To: <alberg30 at yahoogroups.com>
> Sent: Sunday, January 20, 2002 10:08 PM
> Subject: [alberg30] A-30: Stinky insulation?
> 
> 
> > Joe!
> >
> > What it seems like you're describing may not be unusual.  Most type of
> > lagging and wraps will "off-gas" some stuff when first brought up to temp.
> > It sould taper off after a while.  Some other things to be mindful of
> might
> > include:
> >
> > How thick is this material?  How many layers have you wrapped on?
> >
> > How effective is the insulation?  If the outer surface is getting hot
> enough
> > to get very discolored you may need to add an extra layer or two.
> Otherwise
> > it will radiate a lot of heat to the surrounding area.
> >
> > How hot are the other surfaces (bulkheads, hoses, wires, etc.) in the
> > vicinity getting?  If they're hot to the touch after running you need to
> > beef up the wrap.
> >
> > Once you're sure that your're happy with what you've got and won't be
> > removing the insulation for a while you might want to try coating the
> outer
> > surface with a brush-on aluminum paint.  We always did that on shipboard.
> > It's usally of a pretty thin consistancy and penetrates into the cloth.
> > This helps consolodate the wrap and make it less prone to damage, easier
> to
> > clean and nicer looking.  If you try it, be ready for a little more
> > off-gassing of vapors.
> >
> >
> > Tell me about your piping, etc.  What kind of materials did you use?  Did
> > you have it welded up, or is it threaded fittings?  I'm considering doing
> a
> > replacement/upgrade of my exhaust system for this upcoming summer.  I'm
> > curious if there's anything that you'd have differently, knowing what you
> > know now.
> >
> > Am I correct in thinking that you're out in the V.I. now?  Love to hear
> > about that.  My experience there was very brief businees-like, with very
> > little time to do any exploring or relaxing.  I had a little more
> breathing
> > room in Puerto Rico and St. Lucia?  Very nice experiences!  I hope to
> visit
> > the Carribean again someday in the Alberg.
> >
> > Rick Leach
> > S/V Sugar Magnolia, A-30 #121
> > rleach at mbayaq.org
> > www.angelfire.com/ca/Alberg30
> >
> >
> >
> > -----Original Message-----
> > From: alberg30 at yahoogroups.com
> > To: alberg30 at yahoogroups.com
> > Sent: 1/20/2002 5:00 PM
> > Subject: [alberg30] Digest Number 835
> >
> > There is 1 message in this issue.
> >
> > Topics in this digest:
> >
> >       1. New exhaust --questions
> >            From: <alberg30 at mindspring.com>
> >
> >
> > ________________________________________________________________________
> > ________________________________________________________________________
> >
> > Message: 1
> >    Date: Sun, 20 Jan 2002 15:48:19 -0400
> >    From: <alberg30 at mindspring.com>
> > Subject: New exhaust --questions
> >
> > I installed a new exhaust system on my A30. I wrapped the galvanized
> > pipe with a heat sheild fabric, I got from the marina. It ia very
> > similar to the original wrapping made of woven asbestos or maybe
> > fiberglass. I think this stuff is fiberglass.
> >
> > My question: after motoring for about an hour today the wrap started to
> > turn a little brown and there is a slight smell of something burning. Is
> > this normal for the exhaust wrap; will it stop burning after a while? Or
> > should I have coated the wrap with some solution to keep it from
> > burning?
> >
> > The wrap has changed color slighlty and looks a little brown.
> >
> > Thanks in advance
> > Joe #499
> > "One Less Traveled"
> >
> >
> > [Non-text portions of this message have been removed]
> >
> >
> >
> > ________________________________________________________________________
> > ________________________________________________________________________
> >
> >
> >
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> >
> >
> >
> >
> >
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> >
> >
> 
> 
>  
> 
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> 
> 


-- 
 ----------------------------------------------------------------------
  George Dinwiddie                             gdinwiddie at alberg30.org
  The gods do not deduct from man's allotted span those hours spent in
  sailing.                                    http://www.Alberg30.org/
 ----------------------------------------------------------------------