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----- Original Message -----
From: Charly Mitchel
To: REK46@aol.com
Sent: Friday, November 18, 2005 1:49 PM
Subject: Re: Fw: Pneumatic shop lines
I don't believe these statements are entirely true from my professional view
point. We do see and install these copper airlines in commercial
establishments. Copper air lines have been used for many years in pneumatic
controls also. There is nothing wrong with copper air lines. There is not a
problem with electrolysis in copper lines if there isn't any electrical charge
being produced as in water movement. We connect copper to steel pipe in
heating system all the time and have no problem because of the lack of oxygen.
I'm not sure I know what galvanic corrosion is, but steel is the host material
when there is a problem, being copper is a more noble element. Copper lines
also should always be hung with copper hangers.
I have seen pin holes develop inside copper water lines when the iron content
of the water was very high, but I think were talking about something
different.
Do use black iron if you want to have rust build up in the lines. If you
don't know what rust is, it's oxidation of iron: oxygen and water together
with iron. Black iron has no protection against the oxidation.
You know the copper is getting the same bad wrap Lucas gets. Everyone says
Lucas wiring sucks when actually Lucas doesn't make the wiring, at least not
in any cars I've worked on. They all say RISTS on the tag. British car
wiring is typically okay if someone has chopped it up.
Charly
TR6 #44
----- Original Message -----
From: REK46@aol.com
To: charly@mitchelplumbing.com ; billbartlett@WingnutRacing.com ;
fot@autox.team.net
Sent: Friday, November 18, 2005 1:19 PM
Subject: Re: Fw: Pneumatic shop lines
Watch out for copper tubing probs....if it's touching any steel/iron it is
subject to 'galvanic corrosion' and will be sacrificial and create pinholes
and leakage..Plus the joints would have to be 'well done' as in
professionally....stick to the black or galv piping where you have sure
connections via NPT threads and heavy walls....all this rap about
plastic,copper,high-tech,etc reminds me of things like.."Hey,you kids, don't
touch the stove....it's HOT"....and what do they do...think about it...the old
tried and true stuff that pros and commercial places use,and have used forever
,still work! You don't see plastic or copper lines in commercial
establishments where safety and durability are needed.
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