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Tool Talk Discussion Forum

Shop air line

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Ralf from MI

06-05-2007 09:36:15




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A while back I asked about an air line for my shop, copper vs iron pipe. Nine out of ten said copper so I went down to get some pipe. Copper 3/4 pipe was $23.00 a lenght, some one had said there was an OSHA approved plastic pipe for air but it was pricey, anyone know what it's called? At the price of copper it might be worth checking out for 90 ft of pipe. thanks




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wilman

06-07-2007 11:14:22




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 Re: Shop air line in reply to Ralf from MI, 06-05-2007 09:36:15  
Why not just use black iron pipe. 10 feet of 1/2 diameter is around 9 bucks around these parts. That is what I am using in my shop. There has been good discussion on what pipe to use for air compressors on here in the past.

Wil



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traper

06-06-2007 18:24:18




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 Re: Shop air line in reply to Ralf from MI, 06-05-2007 09:36:15  
Ralf//In our shop we used galv pipe some been there 45 years.When installing air lines to hose connections use tee down short nipple tee out 12 inch pipe down sleeve reduce to 1/4 inch install drain valve. [Home rad valve works well]



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Bigbang

06-06-2007 08:15:20




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 Re: Shop air line in reply to Ralf from MI, 06-05-2007 09:36:15  
Just use garden hose, when it swells up it gives you extra capacity requirning the compressor to run less often.



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Charles (in GA)

06-05-2007 17:21:11




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 Re: Shop air line in reply to Ralf from MI, 06-05-2007 09:36:15  
Chen-Aire by Nibco. Its green in color and an ABS based plastic. Approved by California OSHA and now is accepted by virtually every state OSHA and the Feds.

Link



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jmixigo

06-05-2007 16:34:15




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 Re: Shop air line in reply to Ralf from MI, 06-05-2007 09:36:15  
Schedule 80 CPVC. There is a red colored schedule 80 plastic pipe called "chemtrol" but for clean air you won't need it. Several on this forum have beat me up about plastic pipe for air lines, but I see it used regularly in industrial applications with working pressures up to 240 psi. The pipe is not too bad but schedule 80 CPVC fittings can be expensive. The "big box" stores don't carry it-go to a plumbing supply house.

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CWL

06-06-2007 04:42:50




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 Re: Shop air line in reply to jmixigo, 06-05-2007 16:34:15  
The "CPVC" kind of makes sense actually. I've always been told that the heat and vibration are what ends up killing pvc air pipe. Never seen it but have heard about pvc pipe exploding when used for compressed air. The CPVC would take the heat a lot better. Probably would be a good idea to run a short piece of flexible hose between the compressor and the CPVC to absorb some vibration. I've done the copper and steel piping. Out of the two I liked the copper better. I've even seen guys use electrical conduit benders to tweek the copper tubing for an offset. Have to be real gentle though.

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circus

06-05-2007 13:13:16




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 Re: Shop air line in reply to Ralf from MI, 06-05-2007 09:36:15  
Why not use cu and Fe and a hyd. hose? Nothing cools air like metal which condenses out moisture.



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Hal/WA

06-05-2007 21:10:12




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 Re: Shop air line in reply to circus, 06-05-2007 13:13:16  
That was the reason I decided to use copper. And the fact that copper is easier to work with than iron pipe. At the time I did it, it didn't seem that much more expensive than the black iron pipe sections, and the fittings were cheaper. At the far end of my airline, the pipe is always cool, no matter how much air I have ever tried to push through it. The air is also quite a bit dryer than it is if I take it from near the low end near the compressor.

I have my line around the perimeter of my garage with plenty of slope to allow condensation to flow down to a drain at the low end. It is important to remember to drain it though, every time I use it more than a very small amount, since there will be a bunch of moisture in the drain line. Once I forgot and the low part of the drain split when it froze. An easy fix though.

Too bad copper has got so expensive. It seemed like the ideal material for this job. Good luck!

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Quebec Bob

06-05-2007 12:21:21




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 Re: Shop air line in reply to Ralf from MI, 06-05-2007 09:36:15  
I am facing the same situation and am determined to stay with copper. It is so clean and safe and can be altered with reasonable ease. I went yesterday to a bankruptcy place that had three thirty foot sections of 1 inch copper lying around for reasonable prices. If you don't have this kind of supply place around, try checking with a plumber and see what is out there second hand. It is worth a little scouting.

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markiz41

06-05-2007 12:00:00




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 Re: Shop air line in reply to Ralf from MI, 06-05-2007 09:36:15  
I think it's called Chem-aire. I remember reading something about avoiding synthetic oils in your compressor because they'll degrade the plastic pipe. So what's the point?? And availability? I bet the stuff has to be special ordered down to the last fitting. Stay with copper. Have you completely ruled out plain iron pipe?



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you

06-05-2007 10:30:56




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 Re: Shop air line in reply to Ralf from MI, 06-05-2007 09:36:15  
Well, For my two cents worth, If you can find a old house or building being torn down, you can pick out the old plumbing. ( was what I did) Or local scrap guy should have lots to pick from. Anyway a little sweat equity will give lots of FREE stuff. regards, You



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mjbrown

06-05-2007 13:06:55




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 Re: Shop air line in reply to you, 06-05-2007 10:30:56  
I don't think you will see any free copper these days. People are breaking into homes and stealing in use copper plumbing while the owners are at work.



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