1/4in Question

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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Mitchza89
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Hey guys,

I need a 1/4in compression fitting that fitted 1/4in brass/copper pipe, ok.... 1/4in is 8mm..

Therefore does 1/4in pipe have an I.D of 6mm? or do I have everything really mixed up?
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wannabie
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I think 1/4" has an id. of 8mm
In epoxy we trust.
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f.c
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well if the o.d is 8mm then the i.d should be around 6mm.
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jimmy101
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Nominal pipe sizes may or may not be close to an actual dimension of the pipe.

In L type copper tubing, 1/4" tubing is .375" OD (3/8"), and .315" ID. So the ID really is 8mm (actually 8.001mm). That assumes you have 0.035" walls. IIRC, the 1/4" pipe you get at the hardware store is the ".375" OD, .315" ID" stuff.

Mcmaster.com is a good place to look up things like pipe IDs, ODs, pressure ratings...
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Mitchza89
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Thanks alot for that jimmy. Thats what I first thought. Looks like im back to the drawing board...

Cheers.
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