About Flaring

While copper and steel tubes are usually connected by soldering, brazing or welding, there are times when a mechanical joint may be required or preferred. If you connect tubes with a mechanical connection you need flaring. The process called flaring is a tube’s end forming, used for creating a gas- or liquid-tight connection.

Single flaring is the most common and the simplest process of flaring The single flare is available in both 37 and 45 degrees. There are two ways to accomplish a flared tube end – rotary or spinning, and a ram forming the flared end.

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Most of flaring kits are relatively inexpensive and easy to find, despite the fact that different sizes of tubes require specific sets of equipment. You need to use a proper cutting tool to cut a tube. A common flaring tool kit has two main parts – a flare form and a reamer. A flare form is some kind of a clamp which has a number of holes designed to work with tubing of various diameter. The tubing is firmly held by the flare form, allowing you to flare the pipe using minimum strength The thing that makes the actual flaring is reamer, which has holding arms, a screw, and a conical point.

The 45-degree SAE style, and the 37-degree AN style, also used with the JIC system are the common standards for flare tube ends and flare fitting in use today. The AN/JIC style generally has a higher pressure rating for a given size tubing. Due to the different flare angle SAE and AN/JIC connections are completely incompatible. The hydraulic hoses are usually 37-1/2° flare connections, and the refrigeration and air conditioning industry usually uses 45° flare connections. According to NFPA 54/ANSI. Z223.1 National Fuel Gas Code, copper tubes used for natural gas, Liquefied Petroleum, or propane may use flared brass fittings of single 45°-flare type Nevertheless, all National Model Codes permit the use of flare fitting joints, the one should be consulted by the authority having jurisdiction (AHJ) to determine acceptance for a specific application

To make sure that the connectionof tubes using fitting will be leak-tight, you have to flare tubing properly using the proper tools and techniques. First of all, you need to cut the tubing to the proper length using the appropriate tool. Secondly, don’t forget to slide the compression nut on a tubing Finally, make a flaring with the special tool kit.