Ok I won't but is there a code reference?
I posted it in post #29, but I'll post more code this time.
2009 IFGC
404.7 Above-ground outdoor piping. All piping installed
outdoors shall be elevated not less than 3 1/2 inches (152 mm)
above ground and where installed across roof surfaces, shall be
elevated not less than 3 1/2 inches (152 mm) above the roof surface.
Piping installed above ground, outdoors, and installed
across the surface of roofs shall be securely supported and
located where it will be protected from physical damage.
Where passing through an outside wall, the piping shall also be
protected against corrosion by coating or wrapping with an
inert material. Where piping is encased in a protective pipe
sleeve, the annular space between the piping and the sleeve
shall be sealed.
404.8 Isolation. Metallic piping and metallic tubing that conveys
fuel gas from an LP-gas storage container shall be provided
with an approved dielectric fitting to electrically isolate
the underground portion of the pipe or tube from the above
ground portion that enters a building. Such dielectric fitting
shall be installed above ground, outdoors.
404.9 Protection against corrosion. Metallic pipe or tubing
exposed to corrosive action, such as soil condition or moisture,
shall be protected in an
approved manner. Zinc coatings (
galvanizing)
shall not be deemed adequate protection for gas piping
underground. Where dissimilar metals are joined underground,
an insulating coupling or fitting shall be used. Piping
shall not be laid in contact with cinders.
404.9.1 Prohibited use. Uncoated threaded or socket
welded joints shall not be used inpiping in contact with soil
or where internal or external crevice corrosion is known to
occur.
404.9.2 Protective coatings and wrapping. Pipe protective
coatings and wrappings shall be approved for the application
and shall be factory applied.
Exception: Where installed in accordance with the manufacturer's
installation instructions, field application of
coatings and wrappings shall be permitted for pipe nippIes, fittings and locations where the factory coating or
wrapping has been damaged or necessarily removed at
joints.