![]() compression) on one port to an alternative connection on another port, such as NPT or SAE thread, or male NPT to C&T and many other combinations.Ĭone and Thread (C&T) connections are sometimes used in very high pressure applications (up to 150,000 psi), but are most frequently used for “medium pressures” of up to 15,000 psi. Many are also available with the designated style (i.e. Sometimes they are used as reducing fittings for instance from a larger size connection such as 3/8 to a smaller, 1/4 tube. Each style of fitting is available with the specified size end connections and in different configurations, such as: Seamless stainless steel tubing provides a much more reliable performance than the use of longitudinally welded tubing.įor medium pressure applications (up to 15,000 psi) stainless tube fittings are specified by the tubing OD (outside diameter) i.e. They can all be used with medium pressure to high pressure tubing. The threads allow for positive lock and sealing the end face of tube to the fitting body. ⇒ Cone and Thread Fittings (C&T): Tube ends are coned (chamfered) and threaded. ![]() ⇒ Butt Weld Fittings: Permanently joins to the tube end by welding the surrounding metal at the tube end with the fitting. ⇒ Compression Fittings: Slide over the tube and use a ferrule design to coin and seal on the OD of the tube. They are differentiated by their end connections, each having its own advantages and disadvantages in specific applications. ![]() There are three primary styles of medium pressure tube fittings. ![]()
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