A long time ago, the only thing you could use for natural gas was black iron
pipe. Years ago, gas suppliers started putting an additive in the gas that
made the use of copper ok, but some local codes were never changed.

"EXT" etonks@sunstormADD-DOT-COM wrote in message
anews.com...
Around here, copper can be used with propane or natural gas. It is not
allowed to have sweated fittings, nor compression fittings, they all must
be
flared. The copper must be flexible, not sure of the grade, but it is the
thicker wall pipe.

"Edwin Pawlowski" wrote in message
news:EkcAf.150$Jn1.122@trndny01...

"Keith Williams" wrote in message
T...
In article ,
says...
I don't think he said natural gas.

Ok, maybe you'd rather sweat copper with propane in there? ;-)

--
Keith

Propane is often done with copper, mostly compression fittings. As for
sweating with propane in it, yes, it can be done. No., it won't explode.
All of our natural gas lines in commercial and industrial are welded.
Yes,
they are sometimes welded with gas in them, but the meter shut off.