wrote in message
ups.com...
Greetings
Does anyone know if typical schedule 40 PVC pipe is UV resistant? I
have some antenna projects in mind that will be built from this stuff.
I suppose I can paint it for some extra protection, but I was wondering
if it is necessary?

Thanks
Jim/K2TL

It's not bad, some of the early stuff (1970's/1980s) for an installation --
it is a lighter shade of gray today.
The last batch that I purchased a couple of years ago was silk-screened
(yellow) on outside as being UV resistant.
http://www.jmpipe.com/electrical.html

Schedule 80 is thicker (and heavier) and rated for outdoor use (and
punishment).

This is from Carlon (a major electrical PVC conduit mfg.)

UV is an issue for all plastic products. Fortunately, there are additives
that are added to plastics to make the material UV resistance. Listed
Schedule 40 and 80 PVC conduit utilizes these additives and are UV
resistant. The sunlight resistance test is found in UL Standard UL651.
Listed product will have an indefinite life period.



Listed Schedule 40 and 80 Conduit have been used in Florida for years
including on rooftops. It is preferred along the coast because it is
corrosion resistant. When used in an exposed environment where there are
changes in temperatures please are sure to use enough expansion fittings.



Greg
w9gb