When it comes to distributing A/C refrigerant, gas, fuel-oil or very high-pressure water through soft copper or aluminum pipe, there's really only one worthy alternative to soldering:. Where soldering with an open flame could prove difficult or dangerous (a real possibility when working with gas and oil lines), flare fittings allow for a strong mechanical joint capable of withstanding pressures in the 450-3000 psi range, depending on the pressure rating of the materials being used. Typically brass or steel, flare fittings are composed of a threaded body with flared ends, and. They utilize a corresponding flare at the end of the pipe to create their highly secure connection.

Creating that flared end is accomplished by using a. Pro Tip: Flaring is typically only done with malleable metal tubing like and aluminum. In situations where only hard copper pipe is available, you can still flare the pipe ends, but they will need to be annealed first. Annealing hard copper pipe is a fairly advanced skill; if you aren't comfortable with it, leave it to a pro.

Reed's hammer flaring tool for copper tubing has a durable build that is resistant to wear and deformation. This high-quality hammer flaring tool makes 45.

Pipe flaring tools are very simple in both design and operation. They consist of two separate parts: a die block (or 'flare form') with openings for different pipe sizes, and a flared cone attached to a yoke. As the cone is pressed into the pipe end, it shapes the soft metal into the 45° flare that the fitting calls for. Always be certain that you're using the correct flaring tool: in addition to plumbing/HVAC applications, flare connections are used in industry and the automotive world (brake lines, etc.).

The angle of those flares, however, is 37.5° - not 45° as used in 'home' applications. Flaring Steps. Problems usually come up as the result of the pipe slipping in the block while it's being flared. Should there be any issues, you can simply cut the pipe below the end in question, and try again. When finally installing the new flare fitting, make sure that you do not use any joint sealing compounds or tape on the threads. You can use a drop of threading oil to help make connecting your fitting easier. Always leak test after any new connection - this is especially critical if you're dealing with a gas or oil line.

As with any new skill, you should probably do a few practice runs on any spare bits of soft copper tubing you might have lying around; if you're buying new tubing, get an extra foot to play around with. When it comes to crunch time, it will pay off! Frequently Asked Questions Q. 'Where do you use versus flare fittings?' We prefer flare with soft tubing over 3/8' OD in size and fittings on all hard copper and soft tubing 3/8' OD and smaller. Don't use compression fittings on gas connections at all as most codes do not allow it nor do we recommend it. 'What is the flare degree of the flare fittings you offer?'

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The fittings we offer are SAE 45° flare with the exception of the 15/16'-16 flare cap. The 15/16'-16 are 45° flare, but are not SAE fittings. 'Are flare fittings suitable for natural gas connections?' Brass and copper pipe or tubing must not be used where the gas contains more than an average of 0.3 grams of hydrogen sulfide per 100 scf (standard cubic feet) of gas (0.7 mg/100) according to section 1208.5.2.3 of the 2012 Uniform Plumbing Code and section 54.5.6.2.3 of the NFPA (National Fire Protection Association) fuel gas code. Since natural gas can contain some hydrogen sulfide, the brass flare fittings we offer are not recommended.