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JIC fittings, defined by the SAE J514 and MIL-DTL-18866 standards, are a type of flare fitting machined with a 37-degree flare seating surface. JIC (Joint Industry Council) fittings are widely used in fuel delivery and fluid power applications, especially where high pressure (up to 10,000 pounds per square inch (690 bar)) is involved.
The most common flare fitting standards in use today are the 45° SAE flare [2] [3],the 37° JIC flare, and the 37° AN flare. For high pressure, flare joints are made by doubling the tube wall material over itself before the bell end is formed.
AN fittings are a flare fitting, using 37° flared tubing to form a metal-to-metal seal. They are similar to other 37° flared fittings, such as JIC, which is their industrial variant. [2] The two are interchangeable in theory, though this is typically not recommended due to the exacting specifications and demands of the aerospace industry.
The standard ISO 228 - Pipe threads where pressure-tight joints are not made on the threads consists of the following parts: ISO 228-1:2000 Dimensions, tolerances and designation ISO 228-2:1987 Verification by means of limit gauges
a fitting that connects pipes of different diameters, genders, or threads (see § Coupling below) [10] adapter spools (also called crossover spools), used on oilfields and pressure control, have different diameters, pressure ratings or designs at each end [11] adapters to convert NPT to BSP pipe threads are available [12]
American National Standard Pipe Thread standards, often called national pipe thread standards for short, are United States national technical standards for screw threads used on threaded pipes and pipe fittings. They include both tapered and straight thread series for various purposes, including rigidity, pressure-tight sealing, or both. [1]
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