A little off topic

I know this is not a glider question, but it is for a gliderport.

Does anyone know of any pipe other than metal that can withstand 150 psi for
a paint booth application.

I need to run 300 ft. from the compressor to the booth.

Thanks,
Fred

On Mar 28, 6:44*pm, "Fred Blair"
wrote:
I know this is not a glider question, but it is for a gliderport.

Does anyone know of any pipe other than metal that can withstand 150 psi for
a paint booth application.

I need to run 300 ft. from the compressor to the booth.

Thanks,
Fred

http://www.ejprescott.com/products/P...Schedule40.pdf
Depends on diameter and temperature, and the volume you require at
that pressure whether you can find a match.
http://ecat.georgfischer.com/mediaco...aa579b2a9fc075
for schedule 80.

On Mar 28, 8:15*pm, kestrel19 wrote:
On Mar 28, 6:44*pm, "Fred Blair"
wrote:

I know this is not a glider question, but it is for a gliderport.

Does anyone know of any pipe other than metal that can withstand 150 psi for
a paint booth application.

I need to run 300 ft. from the compressor to the booth.

Thanks,
Fred

http://www.ejprescott.com/products/P...Schedule40.pdf
Depends on diameter and temperature, and the volume you require at
that pressure whether you can find a match.http://ecat.georgfischer.com/mediaco...ownloadServlet...
for schedule 80.

150 PSI isn't very much. 4,000 PSI is present in every SCUBA rig, for
instance, and is run in rubber hose; I've seen a lot of small shops
with air piped around and it's always in plastic of some kind. Volume
is an important component as Kestrel points out. It may be cheaper to
run smaller pipe to a small tank at the booth acting as a reservoir so
you can take a higher pressure off the compressor (say 250 PSI) store
that and use a regulator to get the final working pressure at the
booth.

On Mar 28, 5:44*pm, "Fred Blair"
wrote:
I know this is not a glider question, but it is for a gliderport.

Does anyone know of any pipe other than metal that can withstand 150 psi for
a paint booth application.

I need to run 300 ft. from the compressor to the booth.

Thanks,
Fred

I checked in the garage and found 1/2 inch schedule 40 PVC rated to
600 PSI at 73 deg F. That seemed high so I looked for some other
samples. I found 1/2 inch with 480 psi and 400 psi ratings.

Andy

"Andy" wrote in message
...
On Mar 28, 5:44 pm, "Fred Blair"
wrote:
I checked in the garage and found 1/2 inch schedule 40 PVC rated to
600 PSI at 73 deg F. That seemed high so I looked for some other
samples. I found 1/2 inch with 480 psi and 400 psi ratings.

Andy



I know it's often done, but you may want to avoid using PVC or similar pipe
for compressed air, especially if it's exposed above ground. Do a Google
search on compressed air, PVC pipe accidents or see:

http://www.osha.gov/dts/hib/hib_data/hib19880520.html

The problem is that PVC pipe will become brittle with age, UV exposure, oil
contamination or cold temperatures. When it goes bang, the little pieces
become shrapnel.

More expensive, but the save way to go is copper for permanently installed
air lines. Another advantage is that fittings, including threaded etc, are
readily available and soldering is easy.

bumper
zz
QV and MKIII
Minden

On Mar 29, 8:45*am, "bumper" wrote:
I know it's often done, but you may want to avoid using PVC or similar pipe
for compressed air, especially if it's exposed above ground. Do a Google
search on compressed air, PVC pipe accidents or see:


Interesting references - thanks! This was another case where my
natural procrastination paid off. The air line beween my compressor
and the ceiling mounted hose reel is a piece of standard air hose. I
had been meaning to tidy it up with a neatly installed hard line for
years and had been thinking of using PVC. I'll spend the next
procrastination phase considering copper.

Andy

"Andy" wrote in message
...

Interesting references - thanks! This was another case where my
natural procrastination paid off. The air line beween my compressor
and the ceiling mounted hose reel is a piece of standard air hose. I
had been meaning to tidy it up with a neatly installed hard line for
years and had been thinking of using PVC. I'll spend the next
procrastination phase considering copper.

If your air hose is big enough to support your flow rate, just use some PVC
pipe to make a neat conduit for it. It will pretty things up, if properly
installed it will get rid of your low spots, and it will be perfectly safe.

Vaughn

On Mar 30, 2:42*pm, Andy wrote:
On Mar 29, 8:45*am, "bumper" wrote:

I know it's often done, but you may want to avoid using PVC or similar pipe
for compressed air, especially if it's exposed above ground. Do a Google
search on compressed air, PVC pipe accidents or see:

Interesting references - thanks! *This was another case where my
natural procrastination paid off. *The *air line beween my compressor
and the ceiling mounted hose reel is a piece of standard air hose. *I
had been meaning to tidy it up with a neatly installed hard line for
years and had been thinking of using PVC. *I'll spend the next
procrastination phase considering copper.

Andy

One benefit of copper is it becomes a natural cooling coil to help get
rid of moisture. We have 100 ft in an array across top of shop ceiling
and drip leg for condensate.
No water in our air.
PVC has proven over time to be a time bomb unless at pretty low
pressures.
UH

Having experienced the exploding pvc pipe, I would have to agree that
it is not a good idea. This was at the original Cirrus Design
factory. It was on the order of 2" dia. and I think rated 400psi. It
lasted a year or two before it let go. There was not an air dryer at
the compressor, which meant that there was certainly some oil in the
line, which as mentioned, is not good for pvc. Also, we felt that the
shock of turning tools on and off contributed to the failure. The
reason we felt this is because it blew right when someone let off the
trigger on a sander. Fortunately, the shrapnel didn't go very far and
no one got hurt (except our ears!).

"Fred Blair" wrote in message
...

Does anyone know of any pipe other than metal that can withstand 150 psi
for a paint booth application.

Several folks have suggested PVC pipe, and that is a tempting option
because it is cheap. In fact, a piece of 1.5" schedule that I just
purchased is labeled for 330# pressure, more than double the pressure you
mentioned BUT... That rating is for liquid service. Somewhere, there is
another rating for compressed gas usage of PVC pipe and it will have far
lower numbers. See this OSHA warning for more information:
http://www.osha.gov/dts/hib/hib_data/hib19880520.html As OSHA says, the
potential hazard is flying debris from any possible shattering of the pipe.

My opinion:
For a buried installation, I would have no problem with PVC. For exposed
installations, use something else. Years ago, I faced much the same issue
and ended up plumbing my shop with medium diameter air hose. 15 years
later, it still looks like new. (That said, a hose installation may not be
right for a paint booth due to water collecting in low spots. )

Vaughn