Can you double flare aluminum tubing? 3/8" fuel line. I've done steel tubing before, but didn't know if it works on aluminum too. thx, .bjb
I copied your ***le and did a search. https://www.holley.com/blog/post/ho...eal.?msockid=1e437518688968461491600b69f0694a Should answer your question and cover the unasked ones too. When talking about the bits that go into building rods and customs, especially if you are trying to emulate a HAMB era, look at industry from the era. Aircraft, stock autos, mil surplus, pro racing. Add a bit more safety, because we have over a half century of lessons learned and better tools and materials. Building to exactly the level they did is going to be sketchy in some things.
Double flaring to my automotive mind is for brakes. He asked about aluminum and fuel. Stainless has it's own issues with double flaring, which is why the line and fittings are different. I hope that OP is using the appropriate material, line, and fittings for the task. This has all been sorted over the years to best use and industries have been built to supply the proper stuff for each job depending on the environment, the fluids and the pressures. There is always the question of WHY is this done this way, which could be the start of a dive into the knowledge base or could be driven by wanting to use something that's not appropriate for the task due to availability or cost. It's one thing to ask if spray paint will work with pro chemicals, it's different to try to plumb a fuel system. Hoping OP is trying to gain knowledge!
I've double flared copper 3/8" tubing. I annealed it after the first operation. This was non-automotive, propane, and maybe not acceptable practice, but it worked just fine. I don't know if you can easily anneal aluminum, but I don't think so. But then again, there's probably many different kinds of aluminum tubing, some more malleable than others.
I used 3/8 steel brake line with single flare jic fittings. Wasn’t to bad price wise, but it achieved the look I was after
Metal shapers anneal aluminum all the time. Either cover the panel with acetylene soot or sharpie marker ink and burn it off. Panel annealed.
The science behind the single versus double flare "guidance" I never understood, until this gentleman explained it really well: https://dimebank.com/BrakePlumbing.html Cheers, Harv
No need to double flare fuel line . Single flare is probably good for 150psi . I worked in the liquid propane business for 36 years , single flare is approved method of sealing
Actually, not that hard. But will Aluminum fuel line live on the street ? (application not specified by OP)
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