PEX For Air Compressor Lines

 
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Old 03-07-2013, 06:06 PM   #1
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PEX For Air Compressor Lines


Anyone know if I can safely use PEX for running compressed air lines in my shop? I know metal lines are better for the sake of condensation but I need to run a few lines in odd places that would just be a huge pain in the a$$. I refuse to use other plastic pipes for fear of explosion and plastic shards becoming shrapnel. I feel like PEX wouldn't have this issue as it's a real soft plastic and would just split.

I did a bit of research and I've seen quite a few people using pex just don't know what the pro's / con's are. I probably have enough copper to do what I want to do, I also don't feel like sweating the copper. I have to refill my acetylene tank and that's not going to happen for a few more weeks until there's money in the bank account. LOL


Thoughts? Opinions?
Thanks,
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Old 03-07-2013, 06:14 PM   #2
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Re: PEX For Air Compressor Lines


There are kits that are specifically for this pupose:

http://www.rockler.com/product.cfm?p...FYdT4AodB0kAWA

Not sure I would use regular plumbing pex. You can probbaly get this stuff in bulk, most of your CNC equipment has some sort of plastic air lines on it with push style fittings.

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Old 03-07-2013, 08:17 PM   #3
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Re: PEX For Air Compressor Lines


Use Rapid Air, http://rapidairproducts.com/

It's on my list of "to- do" this spring
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Old 03-07-2013, 08:27 PM   #4
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Re: PEX For Air Compressor Lines


Pressure Ratings for pex.
100psi at 180F
160psi at 74F

If you'll notice, these are far below the standard 300 psi ratings of a typical air hose.

Had a guy at the Gun Club ask me the same question. I'll tell you what I told him.

"I wouldn't do it."
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Old 03-07-2013, 09:08 PM   #5
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Re: PEX For Air Compressor Lines


I dunno about pex...why not use PVC?
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Old 03-07-2013, 09:12 PM   #6
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Re: PEX For Air Compressor Lines


Quote:
Originally Posted by Inner10 View Post
I dunno about pex...why not use PVC?
Pvc explodes under pressure
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Old 03-07-2013, 09:22 PM   #7
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Re: PEX For Air Compressor Lines


Quote:
Originally Posted by rrk View Post
Pvc explodes under pressure
News flash son everything explodes under enough pressure.
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Old 03-07-2013, 09:58 PM   #8
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Re: PEX For Air Compressor Lines


Pex is fine. Dont use PVC as if it does crack it will send srapnal all over the place. It's a big no no and OSHA don't even allow it because it's so dangerous.

The rapidair line is cheap at about $50 for $100 foot.
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Old 03-08-2013, 06:59 AM   #9
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Re: PEX For Air Compressor Lines


Quote:
Originally Posted by Inner10 View Post
News flash son everything explodes under enough pressure.
No S Sherlock

When it does explode at pressures that a normal compressor produces you will be picking long pvc shards out of everything.
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Old 03-08-2013, 07:36 AM   #10
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Re: PEX For Air Compressor Lines


Quote:
Originally Posted by BCConstruction View Post
Pex is fine. Dont use PVC as if it does crack it will send srapnal all over the place. It's a big no no and OSHA don't even allow it because it's so dangerous.

The rapidair line is cheap at about $50 for $100 foot.
I don't know the US rules but where does it not allow pvc?

What pex rated too? 150psi?

What's pvc sch 40 rated too 300psi?
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Old 03-08-2013, 07:38 AM   #11
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Re: PEX For Air Compressor Lines


can you make a potato gun out of pex?
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Old 03-08-2013, 08:03 AM   #12
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Re: PEX For Air Compressor Lines


Quote:
Originally Posted by Inner10 View Post
I don't know the US rules but where does it not allow pvc?

What pex rated too? 150psi?

What's pvc sch 40 rated too 300psi?
http://www.osha.gov/dts/hib/hib_data/hib19880520.html

Im sure it can handle the pressure just fine but i would hate to be around if it ruptured. I would def use something design for them pressure with air in mind.
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Old 03-08-2013, 08:08 AM   #13
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Re: PEX For Air Compressor Lines


Quote:
Originally Posted by Tom Struble View Post
can you make a potato gun out of pex?
yes you can this is my mates one.

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Old 03-08-2013, 08:32 AM   #14
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Re: PEX For Air Compressor Lines


GOD bless America!!
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Old 03-08-2013, 09:04 AM   #15
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Re: PEX For Air Compressor Lines


Quote:
Originally Posted by BCConstruction View Post
http://www.osha.gov/dts/hib/hib_data/hib19880520.html

Im sure it can handle the pressure just fine but i would hate to be around if it ruptured. I would def use something design for them pressure with air in mind.
Damn new one on me!

But it mentions they allow types of ABS? I didn't even think ABS was pressure rated.
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Old 03-08-2013, 09:18 AM   #16
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Re: PEX For Air Compressor Lines


Quote:
Originally Posted by Inner10 View Post
Damn new one on me!

But it mentions they allow types of ABS? I didn't even think ABS was pressure rated.
Never looked ad ABS ratings but i think it is a little softer than the PVC so may not fracture like PVC.
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Old 03-08-2013, 12:02 PM   #17
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Re: PEX For Air Compressor Lines


last I checked, abs is for drain/waste/venting only...and even if PVC is rated for pressure I wouldn't use it. I'll take my chances with standard plumbing pex before I used PVC. Albeit black iron is the best but I'm not cutting and tapping pipe for my air system. If anything I'd use copper. I don't see why pex wouldn't work. If it can handle water pressure why can't it handle air pressure? I'm trying to do this on a very economical level. Even if I went copper, I have miles of pipe and fitting I just don't want to deal with sweating all the fittings or buying shark bites.

I'll try pex in a trial run and see what happens!
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Old 03-08-2013, 04:07 PM   #18
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Re: PEX For Air Compressor Lines


Quote:
Originally Posted by lifestooshort81 View Post
last I checked, abs is for drain/waste/venting only...and even if PVC is rated for pressure I wouldn't use it. I'll take my chances with standard plumbing pex before I used PVC. Albeit black iron is the best but I'm not cutting and tapping pipe for my air system. If anything I'd use copper. I don't see why pex wouldn't work. If it can handle water pressure why can't it handle air pressure? I'm trying to do this on a very economical level. Even if I went copper, I have miles of pipe and fitting I just don't want to deal with sweating all the fittings or buying shark bites.

I'll try pex in a trial run and see what happens!
You would take your chances with something not rated for use in your application what so ever before using something rated at over 3x the operating pressure you require? If you feel it's unsafe use sch80 or 120.
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Old 03-08-2013, 06:18 PM   #19
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Re: PEX For Air Compressor Lines


Run it in black pipe.
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Old 03-08-2013, 11:06 PM   #20
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Re: PEX For Air Compressor Lines


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Run it in black pipe.
FINALLY!

A plumber speaks up.

Thanks Rex.

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