compressed air installation. what to do with ?? PP PE PEX PVC

Question

Hello dear colleagues and I am asking for help, I would like to make compressed air installations in my garage, but I do not know what to do with? To make it cheap, fast and safe, when it comes to pressure, max. 12 bar.

At the beginning I thought about a pvc hose, but it will be expensive, maybe it's better PE pipes and twisted elbows, but I don't know if it will withstand such pressure.

k124l · Answer

In many workshops, I have seen the installation of pipes welded to the gray ones to water, they withstand about 12 bar.

puchal.bass · Answer

The price is good, but the welding is a bit unconvincing, it seems to me that the pex is probably the best and the price is the same.

Anonymous · Answer

In the company, we have almost the entire air installation made of welded PP pipes. It is 100 meters long and there are countless elbows, tees, etc. This system is perfect for compressed air. There has never been a breakdown since its foundation, i.e. 12 years. And the plant is pressurized for at least 350 days a year.

puchal.bass · Answer

Maybe someone knows what pressure such an installation can withstand?

Anonymous · Answer

With us, the maximum pressure in the installation is 8 atmospheres because more is not needed. But it can take a lot more.

supchem · Answer

I do not know what pressure they withstand, but in the workshop where my dad worked, such an installation was also made. He worked there for 5 years and there has never been a breakdown. She worked at a pressure of up to 8 bar.

puchal.bass · Answer

Pressure 8 atm. it's not enough for me, the key works for 10 and I would like to have a spare 12, e.g. for sandblasting. Maybe there is someone on the forum with installations, e.g. for sandblasting, and he will suggest something.

Anonymous · Answer

Gentlemen, it's so hard for you to visit the website of the manufacturer of such pipes and fittings and check the specifications before you start building an installation out of them?

puchal.bass · Answer

It just so happens to be where I started. PP 8 PE 12.5 Pex 10 hose even 40,
I guess pex though. cheap tube, it can be formed, so the bends fall off and it will definitely hold 12 as I talked to the seller of these tubes because at 80 degrees it has a strength of 10 atm.

Anonymous · Answer

Well, since your installation has a pressure guarantee from the seller himself, it must withstand I have never designed or installed a compressed air installation, but my intuition tells me that the matter is not necessarily trivial and simple. However, I know how much it is usable 12 bar, I have been dealing with high-pressure steam installations for many years. Out of curiosity, I entered the appropriate phrase into the search engine to confirm my suspicions: theoretically, it is possible to make such an installation from just anything, but it is practically uneconomical and pointless. I do not want to write what I have read, because this knowledge is generally available, but as for the general information - above 8 bar, the installation must be made of materials for such installations. Not these pipes, and not the couplings you're up to. To be at least a little help I paste Link to one of the many systems available. I paste it in order to get an idea of what the toto should look like. Regards

saskia · Answer

I'm afraid that it's not the key that works at 10atm, but you have too little capacity of the couplings or hoses. The same goes for installation. If you make it with a too small cross-section, it can even be 20 atm. it will not be enough. And the more it will be visible when sandblasting.

puchal.bass · Answer

The beta key works at 10 atm and the hose directly from the 14mm compressor I also have a paint gun, but of course on a different hose and with filters. I mean, the tangle of snakes under my feet annoys me, I'm fed up! I know that it is difficult to install such an installation cheaply and well to do with little money, but maybe it will work and I will definitely share my experience with your help. Systems like John Guest, Coprax, Tekalan etc. are too expensive for me.

For now, the first place is taken by pex and brass fittings because the ordinary ones are a failure
but I am wondering the PE (water) holds up to 12.5 atm and the tube is soft unlike PP
just one more thought bothers me what diameter to choose the tube ??

supchem · Answer

It depends on the efficiency of the compressor. In order not to push yourself into any complicated patterns for throughput, etc., etc., I think the most sensible thing to do is to see what diameter of the coupler is at the compressor or what diameter the cylinder outlet is and use the same or slightly larger one. Only we don't know what the author calls installation. Since he has used hoses so far and wants to do this installation cheaply, maybe it is not a complex system, maybe it is just an ordinary pipe passing through 3 rooms with leads to quick couplings. In the installation that I saw, there was also something made that where there was an air intake point (quick coupler on the wall), at the end there was just no valve and quick coupler, only a tee positioned so that one outlet was directed downwards and the other was pointing horizontally from the wall . Valves were screwed to both outlets, the one set downwards drained the accumulated water, and air was drawn from the horizontal one.

Anonymous · Answer

And we don't know how low its budget is. Earlier, I pasted a link to the catalog of the professional system - noo ... - semi-professional. There, such a connector - a muff or a tee costs a few zlotys (EUR , but you assemble the installation and work - for many years you free yourself from the problems of leakage, corrosion, chemical aging, etc. However, since you have to cheaply, I think that you do not necessarily have to combine with substitute materials produced for other media, and in addition we will not be sure if and when the assembled system will cease to function, because the only guarantee is the fact of using a similar one with a brother-in-law or a neighbor. I entered the appropriate phrase in the search engine again to see what we have available in this field in the dedicated but cheap category. I paste another one Cord . As this is a link to the auction, the moderator may comment on it. I also paste a photo just in case. Below the auction, scrolling through the group of materials you can see the unit prices. The question is, is it expensive? IMO - extremely cheap. Regards

puchal.bass · Answer

The maximum pressure of this set is 10 atm. Length 30 meters. Price: 315 plus possible shipping costs. Please do not follow the photo because the description says what the set contains. I have already purchased pex tubes and fittings. I came across something like this on the net, maybe it will be useful to someone: Link
Regards

Anonymous · Answer

Why did you assume the topic, if in your opinion the only correct solution was PEX pipes?

puchal.bass · Answer

Mr. Buddy, I set up a better topic to find out what material would be the best for the installation of compressed air, it seems to me and even I'm sure that the forum is for it. I didn't get a specific answer so I started looking deeper in the web and it turned out that pex is a very good solution.
I greet you lamentation and close it

compressed air installation. what to do with ?? PP PE PEX PVC

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