"habbi" wrote in message
...
Actually it must be polyethylene, it is black with a blue strip and rated
for 100psi, I have seen gold stripe which is rated for 160psi I think. It
comes in rolls and is quite flexible. Anyway I also saw this on one of the
websites for other uses and I read somewhere else that the burst strength
is
usually 3 times the working pressure.
"Transportation of Natural/Coal/Gobar gas " I will try it and if it goes
bang so what.

Only High Density Poly is good for natural gas. All of the HDPE I've seen
used in New York is yellow. High pressure services here are around 60 psi,
AFAIK from conversations with the gas utility. It is fairly thick walled and
not quite as flexible as the type you are talking about, which sounds like
the stuff we use to install sprinkler systems.

"ATP*" wrote in message
...

"Wayne Cook" wrote in message
...
On Mon, 03 Oct 2005 20:37:59 GMT, Nick Hull
wrote:

In article ,
"habbi" wrote:

What is the burst pressure of 1/2" black poly tubing rated for
100psi.
I
want to bury it as an air line between my house and work building so
it
will
have up to 125 psi in it. I have a lot of it for free that is why I
want
to
use it.



I used that stuff for some outdoor water faucets in the garden. All of
it eventually failed (split) at the barb connections. I only run 40
psi
water pressure.

Actually it depends on which stuff he has. The newer poly pipes are
very good especially if he's got gas service rated. It's about all the
gas companies are putting in the ground now days.

Wayne Cook
Shamrock, TX

That would be HDPE, high density polyethylene, also used for the jacket
on
direct bury primary cable.