What type of piping should be used? copper or black threaded?

by larry walsh
(portsmouth nh)

Copper pipe for air lines (Photo: http://www.hardwareireland.ie)

Copper pipe for air lines (Photo: http://www.hardwareireland.ie)

I have compresser in shop. It has copper airlines wich I am totally against. I am trying to convince my boss on doing the safest thing.

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I think, Larry, I would like to understand why you wouldn't want copper air lines?

They are the cleanest, don't rust, and if sweated or threaded together properly, which is much easier to do that it is to install black pipe, make a perfectly safe plumbing material for compressed air.

I am totally against using black pipe due to its tendency to rust and add rust particles to the air stream. I know it's cheaper, but if you can afford it, go for the copper every time.

Lots more info about plumbing an air compressor on this site too.

Bill

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Pipe size for application

by Anthony
(Martinez CA)

What size copper tubing do i need to run 17 cfm @ 100psi 100 ft long?






Bill says...

Anthony, a good question.

The longer and smaller the tube, the more fittings, the more the pressure drop.

The question is, perhaps, how much air do you need at the end where your tool is?

More on that here. Have a read of the pages linked from this one for more specific info.

Cheers,

Bill

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Compressor Pipe Type & Size

by Tom

I HAVE A 25 GAL. TANK CRAFTSMAN AIR COMPRESSOR IN MY GARAGE. I WANT TO RUN SOME 1/2 GALVANIZED PIPE FROM MY COMPRESSOR STRAIGHT UP INTO MY ATTIC AND THEN 45 FT AND THEN DROP DOWN AT ANOTHER LOCATION. I JUST USE MY COMPRESSOR FOR RUNNING AIR IMPACTS TO ROTATE TIRES AND SOME OTHER USES WHEN I'M WORKING ON MY CAR. I WOULD LIKE TO SET IT UP SO I CAN PAINT CARS IN THE FUTURE. WHAT SIZE PIPE SHOULD I USE IS GALVANIZED PIPE OK. SEEMS TO ME THAT WHAT YOU SEE IN MOST AUTO REPAIR GARAGES. THANKS, TOM.






Hi Tom:

Everything you've asked is answered on this site already, with - perhaps - the exception of whether or not to use galvanized pipe.

Where galvanized pipe is a step up from black pipe in terms of rust particle prevention, my jury is still out as to whether or not the actual galvanized coating inside the pipe will separate from the wall and become a downstream problem.

I have contacted galvanized pipe companies to ask about their recommendations for the use of galvanized pipe for compressed air systems, and so far, not one has had the courtesy of even responding to my inquiry.

So, I'm not sure.

To be sure, consider sweated copper or Rubber/Vinyl Air Hose as a substitute for galvanized in your air mains.

As to the other questions, please use the nav bar, search boxes or site map on the site to find the responses you need. It's all there.

Or, be the first to purchase my new ebook entitled The Home Compressor, due to be finished next week, and released then. It covers all of your questions too. Watch for the release notice on the home page shortly.

Cheers,

Bill

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