large air line

Karl Townsend fired this volley in news: snipped-for-privacy@4ax.com:

Karl, when we were blasting the paint off'n Swift boats in RVN, we used

1" line for anything up to the blaster rig itself. Then, whatever sized lines it had.

It's not "safe" for shop piping, but sch-40 pvc is rated higher than you'll be using it.

I've done that a few times to get air 200-300 feet away for a job like blasting my gate posts clean.

LLoyd

You can probably rent larger air line from United, Nations or other equipment rental places that rent trailer type compressors at a reasonable rate. You might find renting larger blast equipment is practical as well if it saves a lot of time and labor. Otherwise a roll of 1/2" or 3/4" PEX tubing and a couple fittings should work, and be useful for redeployment later as water plumbing.

3/4" garden hose?

It's not rated for air *at all*. No need for "scare" quotes - it's not safe for use with air, unless it's completely contained in ground or a shatter shield. Fundamentally different things happen when a plastic pipe containing 100PSI water and one containing 100PSI air crack. One results in shrapnel.

Large diameter rubber air compressor hose (as seen on a jackhammer hear you) - as already mentioned, it can be rented from the same places that rent towed compressors and jackhammers. Or you might find a roll at an auction.

Ecnerwal fired this volley in news: snipped-for-privacy@news.eternal-september.org:

Yes, Nanny. I won't do that anymore.

LLoyd

A rough calc for 100' of line and 20 cfm gives a pressure drop of 48 psi for .5" id, 5.6 psi for .75" id, and 1.2 psi for 1" id - diameter is your FRIEND :-).

I'm over to "the Kid's" place tommorrow. We're moving the air compressor to his basement and setting up scaffold for sandblasting the whole exterior of the house. He just found 100' of 3/8 line restricts the blaster too much.

His question, what should be used for temporary large ID air line?

Karl