Hey, It is electrogalvaised that is why it doesnt have spangles on it as say
AC ductwork. I have used a lot of it. Made my burning buggy out of 3/4" and
fusion gas welded it together. If you are going to weld it make sure you
have good ventalation. Ridgid conduit is the same as galvanised schedule 40
pipe. The difference is each piece of conduit is inspected to insure there
are no obstructions that would damage the insulation on the wires. Emt
stands for electrical metalic tubing. It is lighter gauge than conduit or
pipe but quite sturdy for many uses. Boating supply companys used to have
fittings to join it to make winter covers. Try Defender Marine if they are
still around.
"Grady" wrote in message
news:s9qAd.11575$c%.1167@okepread05...
You left out one. You can also get aluminum conduit that takes the same
fittings as galvanized rigid.


"RoyJ" wrote in message
k.net...
A couple of the posts hinted at it but: There are 3 kinds of electrical
grade round metal tubes: thin wall conduit (commonly called EMT),
intermediate (uses standard fittings, has a wall just thick enough to take
the threads) and rigid conduit (same dimensions as pipe, just different
specs for surface finishes) All of them are galvanized or zinc plated. All
of them have funny measuring systems where they are marked for the inside
dimension.

The thin wall conduit used to run about $1.25 per 10' in 1/2" (trade
size), currently running close to $3/ft due to steel prices. Lightweight,
easy to use, easy to bend with a hand bender. Use hydrochloric acid to
strip off the zinc. Down side is that the steel is fully annealed and
VERY soft. You can easily bend the 1/2 and 3/4" sizes over your knee.

Intermediate grade is much stonger than thinwall but will likely be too
expensive for your needs. Rigid is a high grade water pipe, more $$ yet.

If you are doing frames and handles, take a look at black iron pipe.
Typically sold as gas pipe at Home Depot and others. You can get a
hydraulic bender at Harbor freight, stuff welds great.
http://www.harborfreight.com/cpi/cta...emnumber=32888

Cheers.


Ronnie wrote:

I'm tired of trying to find 1/2" thin wall, round tubing (not pipe). It
was suggested locally that I try using rigid EMT electrical conduit.
Anyone use this for projects? I don't know why it won't work; it
doesn't appear to be galvanized. The best part is .26 cents a foot
versus $3.00 a foot for mailorder tubing. Ronnie