plumbing air lines - any height issues

when running black pipe is there a minimum or max height to mount the piping? i do not need or want to go right up to the crane rails int he shop.


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Bill says....

Not as far as I'm concerned. You don't want them low enough to be impacted on by processes in the plant.

You also want the main to have a few degrees of slant to a common point for drainage, and you want to take the drop lines off the top of the main, not the bottom.

You may want to have a look at the info that is on the Plumbing Compressed Air pages linked from the site map.

Cheers,

Bill


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Location of Detached Receivers

by Steve C
(Muscle Shoals, AL)

The receiver on our compressors are separate tanks, is it better to store these tanks inside a temperature controlled building or outside where the temperature flucuates with the seasons?






Bill says...

Hello Steve;

If you have a moment, take a look at these pages on plumbing compressed air. Follow the links to the water issue pages.

You want compressed air to cool in the receivers and drop as much water there as possible, before the compressed air gets into the mains.

It seems to me that if you are plumbing your hot compressed air to a tank outside, and it's cold out, then the air will cool faster than if the tank were in a temperature controlled, but higher temperature level, inside area.

One problem with outside tanks is the frozen water in the bottom of the outside receiver (and I think you folks are seeing freezing weather right now) blogging the auto drain, and, depending on your compressed air demand, building up a reservoir full of water.

If I had my druthers, I'd put the tanks as far from the compressor as possible (the farther travel cools the air faster) and at around 35-40 deg. F.

Other opinions welcome.

Cheers,

Bill

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how big a compressed air hose / line?

by Jim Wyss
(Fort Wayne, IN )

we would like to run about 500 lineal feet of compressed air hose with 5 stations at 100 ft centers. what line(s) are suitable for this use? the compressor we have is set at 150PSI and rated at 175 cfm and we have an internal dryer. we will primarily be using equipment for a single RR car air tester for brakes that needs 90 PSI at 50 cfm
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Jim, part of the answer will depend on how many of those stations will be pulling air at 50 cFM at a time, and for how long, each time, they will do that?

If the demand is continuous and for all stations, rather than a single linear feed, consider a ring installation.

Consider, also, installing a large receiver mid-way, so that, when the testers are not running, the tank can fill with air and be used as a supply reservoir for the more distant stations. If you are installing a ring, and as I say, I recommend that, then put the tank at the far end of the run so air can be drawn from both the compressor tank and the reservoir.

I am not a proponent of black pipe for air systems, yet, if I were installing a main for this project, I would go with a 3" - 4" main at the ceiling for this application, that will likely be the most competitively priced. Sweated copper would be my first choice, but not too many folks can afford that material for an air line. So black pipe it may have to be.

You do want to read all the pages on this site to do with plumbing compressed air, as there are a number of tips that will come in handy, particularly the ring installation and how to correctly install drop lines.

Cheers,

Bill





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