Brass Flare Fittings

Brass Flare Fittings


Flare fittings are a type of compression fitting used with metal tubing, usually soft steel, ductile (soft) copper and aluminum, though other materials are also used. Tube flaringis considered to be a type of forging operation, and is usually a cold working procedure. 


The tool used to flare tubing consists of a die that grips the tube and a mandrel that is forced into the end of the tube to form the flare by cold working. The most common flare fitting standards in use today are the 45-degree SAE style, and the 37-degree AN style, also used with the JIC system. The AN/JIC style generally has a higher pressure rating for a given size tubing. SAE and AN/JIC fittings are completely incompatible due to the different flare angle. Further, AN fittings (or those complying with subsequent standards) and JIC fittings are not interchangeable for design-controlled applications due to differing quality standards. The refrigeration and air conditioning industry usually uses 45° flare connections while hydraulic hoses are usually 37-1/2° flare connections.

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