I want to attach a fitting to the 3/16" steel (Al?) rigid tubing which is the output on my fridge compressor so that it will have a 1/4" threaded end. It will most likely be used up to around 500 psi and I am not sure as to the best way to attach the fitting.
Ideas-
1. Score the tubing and JB-Weld the fitting on; I do not how strong JB-Weld actually is.
2. Weld it, pretty straightforward.
3. [Submit your possibly better suggestion here]
how to attach high-stress fittings
Man, my fridge had 3/16 or 1/8 copper output, which 1/4 inch copper just so conveniently fit nicley over, so I sodered it.
JB Weld (or other appropriate epoxy, I like marine epoxy) would work fine, just make sure to clean and roughen up the surfaces well and give it 24 hours to set up.
JB Weld (or other appropriate epoxy, I like marine epoxy) would work fine, just make sure to clean and roughen up the surfaces well and give it 24 hours to set up.
I like to play blackjack. I'm not addicted to gambling, I'm addicted to sitting in a semi-circle.
I used a compression fitting.
But instead of the metal ring, a piece of rubber bike pump hose.
Holds 30 bar without any problems when tightened down firmly.
I believe you can use a 1/4" threaded fitting with an endcap, but then with an hole drilled through the endcap.
But instead of the metal ring, a piece of rubber bike pump hose.
Holds 30 bar without any problems when tightened down firmly.
I believe you can use a 1/4" threaded fitting with an endcap, but then with an hole drilled through the endcap.
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Gippeto
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I'll second the recommendation for a compression fitting.
But;
Why would you replace the ferrule (olive to some) with a piece of rubber?
Compression fittings were designed to work with a ferrule, and they do. I routinely use compression fittings to thousands of psi.
Have a little faith in those engineers that were paid to design the thing.
But;
Why would you replace the ferrule (olive to some) with a piece of rubber?
Compression fittings were designed to work with a ferrule, and they do. I routinely use compression fittings to thousands of psi.
Have a little faith in those engineers that were paid to design the thing.
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Liberalism is a mental disorder, reality is it's cure.
Liberalism is a mental disorder, reality is it's cure.
Because the ferrule only works on a perfectly round pipe with the right OD.
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POLAND_SPUD
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@ psycix I agree with psycix that using rubber is a good idea..
on my fridge compressor I use a homemade compression fitting made from: two identical 1/2" male-female fitings with several rubber washers squeezed in between them...
washers had a small hole so I put the tube through the washers and then tighthened the fittings as much as I could... seems pretty simple doesn't it ?? suprisingly it has never leaked... not even at 500psi
on my fridge compressor I use a homemade compression fitting made from: two identical 1/2" male-female fitings with several rubber washers squeezed in between them...
washers had a small hole so I put the tube through the washers and then tighthened the fittings as much as I could... seems pretty simple doesn't it ?? suprisingly it has never leaked... not even at 500psi
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jimmy101
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They are just assembled with a pair of wrenches. For one manufacturer's instructions see http://www.bulksrl.it/pdf/tube/ing/general_info_ing.pdf
Usually, compression fittings are rated to a higher pressure than is the pipe (or tube) it is designed to be used with.
IIRC, standard compression fittings for standard 1/4" copper pipe is rated to several thousand PSI.
Usually, compression fittings are rated to a higher pressure than is the pipe (or tube) it is designed to be used with.
IIRC, standard compression fittings for standard 1/4" copper pipe is rated to several thousand PSI.
