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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.
Tube flaring is a type of forging operation, [1] and is usually a cold working procedure. During assembly, a flare nut is used to secure the flared tubing's tapered end to the also tapered fitting, producing a pressure-resistant, leak-tight seal. Flared connections offer a high degree of long-term reliability and for this reason are often used ...
Alternatively it is a short length of pipe with two female National pipe threads (NPT) (in North American terms, a coupler is a double female while a nipple is double male) or two male or female British standard pipe threads. If the two ends of a coupling are of different standards or joining methods, the coupling is called an adapter. Examples ...
A few Fischertechnik girders actually are made of aluminum. [4] At least one company made Fischertechnik-compatible aluminum bars of any desired length. [ 5 ] To teach the physics of such models, some sets included measuring devices, so that trigonometric vectors could be calculated and tested.
JIC fitting systems have three components that make a tubing assembly: fitting, flare nut, and sleeve. As with other flared connection systems, the seal is achieved through metal-to-metal contact between the finished surface of the fitting nose and the inside diameter of the flared tubing.
Steel tubing, generally of square section, has been used for wheeling machine frames during the past 30 years, in the US particularly, where sheet metal shaping has become a hobby as well as a business. Tube-framed machines are reasonably priced and are available as kit-built machines or can be built easily from plans.
Crimped or pressed connections to use special fittings permanently attached to tubing with a powered crimper. The fittings, manufactured with a pre-installed sealant or O-ring, slide over the tubing to be connected. High pressure is used to deform the fitting and compress the sealant against the inner tubing, creating a leakproof seal.
-HX2 = 1/4 hard-HX4 = 1/2 hard-HX6 = 3/4 hard-HX8 = full hard-HX9 = extra hard-O : Full soft (annealed)-T : Heat treated to produce stable tempers -T1 : Cooled from hot working and naturally aged (at room temperature)-T2 : Cooled from hot working, cold-worked, and naturally aged-T3 : Solution heat treated and cold worked
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