OK for air line connection?

[John T]

Are these ok for air line connections?


I've use them on my old system before... seemed ok... if there were any leaks it was not noticeable...

upgrading my system so thought i'd ask...

a proper bashing may change my plan...

pics coming...

 

[John T]

want an EZ disconnect if necessary


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[John T]

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[Jarwop]

Sure it okay.

 

[Lelandwelds]

They look like they are in good shape. I would re use them. The part that ***** is cutting and threading all that pipe. I've got a threading machine and I dread it.

What's the upgrade?

 

[DieselNut88]

No problem. The building I working in has tons. A lot are 2" too. Zero leaks. Just tighten them down good.

 

[EOC_Jason]

Nothing wrong with unions... Just make sure the mating surfaces are clean before joining and tightening down...

 

[rpcraft]

if it's good enough for natural gas then I'm sure air is fine...

 

[kbs2244]

"if it's good enough for natural gas then I'm sure air is fine... "
Inside the house NG is about 4 PSI.
You can stop it with your finger.

 

[The Cobbler]

"if it's good enough for natural gas then I'm sure air is fine... "
Inside the house NG is about 4 PSI.
You can stop it with your finger.

actually about 1/4psi

 

[Will Allen]

Natural gas comes into the meter at 60 psi. The regulator turns it down to 2 psi.

 

[rpcraft]

I was thinking more on industrial scale but i suppose you are correct in that aspect..

 

[Norcal]

Natural gas comes into the meter at 60 psi. The regulator turns it down to 2 psi.

Residential gas pressure is 7 inches water column, which is about 1/4 PSI. 28" water column (1 PSI) is considered high pressure gas.

 

[RWorth]

I've used those unions for air for 40 years and never had an issue.

 

[SgtHawkUSMC]

If you run black pipe, open up a connection next year and check out all the rust scale. That's if you aren't running a good drier I suppose. Personally, I never run it after I took a piece off a couple years back.

 

[audioworks04]

If you run black pipe, open up a connection next year and check out all the rust scale. That's if you aren't running a good drier I suppose. Personally, I never run it after I took a piece off a couple years back.

I agree, I ran black pipe all over my last garage and when I moved I pulled it all out! It was unbelievable how nasty the inside was and I had drains all every drop that I drained quite often. This time I’m running all pex except the regulator and filter so that they are easier to mount.


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[sberry]

It might not make much diffet ence in a simple system but put the service valve on the other side of the union.

 

[John T]

It might not make much diffet ence in a simple system but put the service valve on the other side of the union.

Hah
Good point.

But I also have a valve at the tank also.




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[John T]

They look like they are in good shape. I would re use them. The part that ***** is cutting and threading all that pipe. I've got a threading machine and I dread it.



What's the upgrade?

Actually I can get away with all store-bought Lengths...

My plan is

From the tank:
4 feet to the ceiling
Across 4 feet to the right
and down about 6’ to a drip leg
I will T off the drip leg into the filters
Then up 4’
Then across the ceiling about 12’
To a 3’ whip
Into the hose reel.

Upgrade is a quincy 2 stage and 1/2” lines.

Auto tank drain also


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[John T]

Hah
Good point.

But I also have a valve at the tank also.

I wanted to shut off right before the filters
To change elements and desiccant

 

[sberry]

1/2 line is good. I like it better than larger pipe for a couple reasons. 1st, the worry about flow rate is usually nonsense in these garages and it is closer to 5/8 than 1/2. Fittings go over instead of inside like tubing or hose. Most air is going thru a regulator and using 3/8 hose anyway. These systems are relatively short, loss just isn't a problem even with 3/4 air guns and 1/2 hose till way past 100 ft.
A modest pipe helps keep the air velocity up a bit and carrys water along if it should get there a lot better. Main reason to valve ahead of the union is on larger systems, allows local shut down to remove the stuff to work on it if needed without affecting the rest of it. As you point out not a deal here either way.

 

[sberry]

I have a couple places not used as often with old hoses, I shut off when not needed as the system is on 24/7. No drip leg in a couple of them, the filter would be the catcher if it had water.
I have a back up and demand comp, I do leave the breaker off to it. It's so rare with 200 gallons of tanks on to need it and if something should ever go wrong no point in 2 units running.

 

[Coloshaver]

I ran about 70' of black pipe around my shop with 5 drops from my 16' ceiling. When I first turned it on, I had a leak at the regulator. To take the regulator out, I would have had to undo it all

It turned out I was missing a plug in the regulator that I could install without taking it all apart, but my take away was - use unions every 2 - 3 pipe lengths.

 

[Will Allen]

Residential gas pressure is 7 inches water column, which is about 1/4 PSI. 28" water column (1 PSI) is considered high pressure gas.

I had my meter replaced last week. The guy said it comes in at 60 psi and leaves the meter at 2 psi.

 

[lakeroadster]

Are these ok for air line connections?

What pressure air line connection?

Looks like those are std black iron fittings which are typically specified as 150 psig Maximum Allowable Working Pressure.

https://www.homedepot.com/p/LDR-Ind...gclsrc=aw.ds&dclid=CKOWkezDkdgCFQYbAQodok4OGA

They make higher pressure fittings if needed.

 

[John T]

What pressure air line connection?

Looks like those are std black iron fittings which are typically specified as 150 psig Maximum Allowable Working Pressure.

https://www.homedepot.com/p/LDR-Ind...gclsrc=aw.ds&dclid=CKOWkezDkdgCFQYbAQodok4OGA

They make higher pressure fittings if needed.

Mine are rated for 300 PSI

 

[GMCGarage]

Residential gas pressure is 7 inches water column, which is about 1/4 PSI. 28" water column (1 PSI) is considered high pressure gas.

Mine is propane.