I'm building a decorative piece for a guy, basically a steel tube rectangle with
holes drilled in it so copper tubing can pass through. I'm wondering about
preventing galvanic corrosion. In particular, I'm wondering if anyone makes slip
flanges of plastic that are designed to shield 5/8" OD copper tubing from
touching steel studs. It seems likely due to all the copper they run and all the
steel stud framing they do nowadays. Anyone know?

GWE

Grant Erwin wrote:
I'm building a decorative piece for a guy, basically a steel tube
rectangle with holes drilled in it so copper tubing can pass through.
I'm wondering about preventing galvanic corrosion. In particular, I'm
wondering if anyone makes slip flanges of plastic that are designed to
shield 5/8" OD copper tubing from touching steel studs. It seems likely
due to all the copper they run and all the steel stud framing they do
nowadays. Anyone know?

GWE
This might be of help... http://www.build-smarter.com/Chapter4/steelframing6.htm

In article ,
says...
I'm building a decorative piece for a guy, basically a steel tube rectangle with
holes drilled in it so copper tubing can pass through. I'm wondering about
preventing galvanic corrosion. In particular, I'm wondering if anyone makes slip
flanges of plastic that are designed to shield 5/8" OD copper tubing from
touching steel studs. It seems likely due to all the copper they run and all the
steel stud framing they do nowadays. Anyone know?

GWE


There's this sort of thing...
http://www.richco-inc.com/group_deta...50&grpcode=070
http://www.richco-inc.com/browse_group.asp?seccode=450

But unless the piece is exposed to hard water or some other electrolyte,
galvanic corrosion won't be a problem.

Ned Simmons

On Mon, 15 May 2006 13:40:52 -0700, Grant Erwin
wrote:

I'm building a decorative piece for a guy, basically a steel tube rectangle with
holes drilled in it so copper tubing can pass through. I'm wondering about
preventing galvanic corrosion. In particular, I'm wondering if anyone makes slip
flanges of plastic that are designed to shield 5/8" OD copper tubing from
touching steel studs. It seems likely due to all the copper they run and all the
steel stud framing they do nowadays. Anyone know?

GWE

Go look in the Electrical Supplies section. They make snap-in
bushings for 1/2" NPT (7/8 OD) knockouts that should work fine with
1/2" Nominal (5/8" OD) copper tubing. There will be a sixteenth or so
of slop, but it will prevent any galvanic action and be pretty good
protection against a vibration induced rub-through.
http://www.aifittings.com/m_6.htm#1
http://www.aifittings.com/m_3.htm#4400

They make snap-in insulators for the pre-punched holes in steel
studs, but they are a bit larger - 1-1/2" or so.
http://www.aifittings.com/c_13.htm

-- Bruce --

--
Bruce L. Bergman, Woodland Hills (Los Angeles) CA - Desktop
Electrician for Westend Electric - CA726700
5737 Kanan Rd. #359, Agoura CA 91301 (818) 889-9545
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