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JIC fittings and AN fittings are both common types of flare fittings used to create secure connections in hydraulic and fluid transfer applications. However, there are some key differences between them to consider when choosing the right fitting for your needs.
The history and design of the JIC fittings vs An fittings
The 37deg flare fittings have proven their worth in many different industries over the past ninety years. The male cone-tipped string mates to either a female coned seating or the internal shape on an erupted tube end. When you mate JIC string with tubing, a strain dissipating sleeve with nut is used to apply strain to flare of tubing and maintain the seal.
This metal-on-metal sealing is ideal for high temperatures or tension, and it is also resistant to vibration. JIC should be investigated to see what makes them so effective.
History and Plan
It was some time ago that the possibility of a flare fitting with a 37deg angle began to be discussed. This was before JIC became a standard under SAE J514. These fittings were initially designed to be used by the US Naval and Armed forces during WWII. These fittings, known as AN (Military Naval Force Fittings), were high-performance fittings with a solid reputation in auto and aviation applications.
After the war, many organizations tried to produce their own flare-style fittings, with varying degrees of success. Many fittings could not be used together without a standard.
In 1950, the Joint Business Gathering discovered that it would create a standard for manufacturers to use when delivering this type of fitting. They did this with the help of a council made up of experts from the General Public for Auto Designers. The A fittings were kept largely the same, but they were normalized to a lower level of string (JIC – 2A/2B versus AN – 3A/3B). This allowed manufacturers to deliver them more easily and at a cheaper price.
JIC Fittings are used by who?
In the beginning, 37-degree fittings are used for fuel and oil systems (counting as pressure driven fittings in liquid power applications). They are still used for these applications today, but they have also been adopted by many other businesses, including water treatment, compound exchange systems, carwashes, and oil-based fuel systems.
When should JIC be used with A fittings?
As mentioned above, AN was created to a very tight resistance standard. JIC was normalized to a more realistic resistance level in order to keep costs and troubles down. A framework using the A standard may be able to withstand if the resistances are too free. The framework may also fail to meet the strain rating guarantees if an unacceptable fitting is used.
Where Can 37deg Fittings be Used?
37deg fittings can be used for a wide range of purposes. The pressure rating, the fitting material and the media thickness are three important factors to consider when deciding if JIC will be a good choice.
1. Pressure Rating – pressure ratings are compared with the fitting material, manufacturer, or temperature. Be sure to follow the rules of your specific accommodating manufacturer for temperature and tension.
2. JIC fittings come in a variety of materials, including steel, titanium, treated steel and metal. Some fitting materials may be compatible with other fittings or media streaming in the framework. Be sure to recognize similarities before settling on material.
3. The thickness of the media is important. Since JIC uses a metal-onmetal seal it’s not ideal for lighter gases. This type of media may leak due to minute imperfections on the metal surfaces. In this case, an elastic-based or delicate material fitting might be appealing.
37 Degree Cylinder Explosion
For JIC fittings to work with rigid tubing, it is necessary to erect the tubing to a 37-degree angle to match the seating surface cone of the male fitting. JICs are often referred to as 37-degree fittings. Use an erupting tool specifically designed for this type of flare. You must ensure that the nut and sleeves are on the tube before you ignite it. This is so they do not slide over the cylinder when it erupts.
Both manual and water-driven erupting tools are available. The water-powered unit is easier to use, but it also comes with a higher price tag.
It can be difficult to master the art of erupting. Some have switched to a framework with no flares, such as Superlok I Fitting.
When to Replace a Flare Connector
JIC and A connectors will begin to wear out sooner or later. This is especially true if the association has been dismantled, reassembled and repaired frequently. Search for scarring or wear on the cone’s seat, as well as a slackening of the pleat holding the female strings to the female turn connectors.
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Worn male 37deg
1. This can be caused by small scratches or wear on the cone seats. It could be caused by repeated re-installations or the introduction of an unfamiliar trash to the fixing surfaces.
2. Cone Implosion – If a flare is too tightly fixed, the male cone’s tip may begin to collapse internally. This can lead to a restriction of flow, a debilitated sealing potential, or an all-out spill.
