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Fridge pipes!

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Fridge pipes!

Unread postAuthor: pipeboyswe » Tue Jun 07, 2011 3:44 pm

Hi guys! My problem is that the output pipe from my fridge compressor is a 5mm steelpipe and is there any other way to connect it to my setup without welding? Does compression fittings work on steel? Or witch other options do i have?
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Unread postAuthor: sprayandprayboy » Tue Jun 07, 2011 3:58 pm

maby compression fittings or http://www.google.com/imgres?imgurl=htt ... x=30&ty=66 :oops: i know its a long link ... but compression fittings do not work well on car brakes so ive been told or you can go to a brake shop and ask if they can do
the double flare for higher pressures such as in a brake system.

double flare link http://www.cdxetextbook.com/toolsEquip/ ... flare.html

i have never done double flare ive only done single flare :roll: and compression fittings

i hope this helps :nike:
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Unread postAuthor: ramses » Tue Jun 07, 2011 4:58 pm

You can generally solder to steel. Find a suitable chunk of steel, drill a 5mm hole in one end, and drill and tap for 1/8 or 1/4" NPT in the other end. Flux it, shove the steel tube in, solder, and done.
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Unread postAuthor: pipeboyswe » Wed Jun 08, 2011 12:20 am

Ok, but would it be safe to handle @ 500psi? :roll:
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Unread postAuthor: Crna Legija » Wed Jun 08, 2011 12:24 am

i used a home made compression fitting its held 900psi fine
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Unread postAuthor: pipeboyswe » Wed Jun 08, 2011 12:29 am

A homemade one? How? :lol:
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Unread postAuthor: Technician1002 » Wed Jun 08, 2011 12:34 am

The normal method to connect a hermetic seal on the compressor is with silver brazing. It requires a welding torch to do properly.
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Unread postAuthor: Crna Legija » Wed Jun 08, 2011 1:48 am

pipeboyswe wrote:A homemade one? How? :lol:


I got a 1/2' compression tee and 1/2 cap drilled a 5mm hole in the cap.
Found a hard rubber door stopper drilled a 5mm hole in it and sanded the OD so the compression olive fits over it. Then put it together just like a normal compression fitting.
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Unread postAuthor: metalmeltr » Wed Jun 08, 2011 10:12 am

As long as you can get a single flare to form in the steel pipe it should work fine. Compression fitting should also work, contrary to a previous comment compression fitting can handle braking system pressures and would be fine at 500psi. If niether of those options work then you can try to find someone who has a flare tool capable of ISO bubble flares. These are a brake flare for metric lines and should workif you can find the tool. They are easily located though tool distributers but can cost an arm and a leg soif you know someone who has one that would be your best bet at getting your tube flared. Hydraulic Universal flare tool
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Unread postAuthor: sprayandprayboy » Wed Jun 08, 2011 11:26 am

contrary to a previous comment compression fitting can handle braking system pressures and would be fine at 500psi I only heard thet they cannot hold brake pressuer thank you.
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