Abstract: A fitting incorporating a crimp sealing device and a method of forming a seal between a length of corrugated tubing and the fitting are provided. A sealing crimp is formed over at least one corrugation of the tubing, where the sealing crimp can utilize a preformed bend or bulge to form a crimp and seal. Alternatively, the sealing crimp can apply pressure radially against an outer sleeve of the fitting, such that at least one corrugation of the tubing is compressed axially or radially to form a primary seal. The outer sleeve also can include one or more gaskets arranged between the outer sleeve and the tubing for forming a secondary seal. An inner sleeve can be received radially inside the outer sleeve, and one or more gaskets can be arranged between the inner sleeve and the tubing. Further, a jacket crimp can be applied against an end of the sleeve member to contact a jacket that at least partially covers the tubing.

Abstract: A fitting incorporating a bushing for forming a seal between a length of corrugated tubing and the fitting, and methods of actuating the fitting and forming a seal using the fitting and tubing are provided. The tubing can be corrugated stainless steel tubing having a jacket that at least partially covers the tubing. The fitting includes a bushing having a substantially open configuration, the bushing configured to engage at least one corrugation groove. When a nut is advanced, the bushing applies pressure to the tubing to crush at least one initial corrugation to form a metal-to-metal seal that is gas and liquid tight.

Abstract: Corrugated tubing (2) having a smooth or semi-smooth bore, and methods for fabricating such tubing are provided. A length of corrugation tubing (2) can be formed with a filler (4) or liner material inside the tubing. The filler material (4) or liner material may yield one or more improved properties such as reducing head (pressure) loss, reducing friction, sound damping, fire resistance, and corrosion resistance. The corrugated tubing with a smooth or semi-smooth bore can be included in a piping system in which a fitting is connected to the tubing.

Abstract: A fitting incorporating a snap-fit sealing and locking device and methods of actuating the fitting and forming a seal between a length of corrugated tubing and the fitting are provided. The tubing can be corrugated stainless steel tubing having a jacket that at least partially covers the tubing. The sealing and locking device incorporates a bushing that is advanced through the application of axial pressure into a sleeve portion. Fingers on the bushing engage one or more corrugation grooves on the tubing and apply force to the tubing to collapse one or more corrugations to form a metal-to-metal seal. Distal motion of the bushing is inhibited after forming a metal-to-metal seal by contact between the bushing and the sleeve portion.

Abstract: A fitting (14) incorporating a quick actuating sealing and locking device and methods of actuating the fitting and forming a seal between a length of corrugated tubing (10) and the fitting (14) are provided. The tubing (10) can be corrugated stainless steel tubing having a jacket (12) that at least partially covers the tubing. The sealing and locking device incorporates a sealing ring (24) and a loading ring (26)—received in the fitting (14), the sealing ring (24) being compressible against an end corrugation of the tubing—. The loading ring (26) can be actuated to move axially and engage the sealing ring (24), thereby compressing the sealing ring (24) into substantial engagement with the end corrugation.

Abstract: A fitting incorporating a crimp sealing device and a method of forming a seal between a length of corrugated tubing and the fitting are provided. A sealing crimp is formed over at least one corrugation of the tubing, where the sealing crimp can utilize a preformed bend or bulge to form a crimp and seal. Alternatively, the sealing crimp can apply pressure radially against an outer sleeve of the fitting, such that at least one corrugation of the tubing is compressed axially or radially to form a primary seal. The outer sleeve also can include one or more gaskets arranged between the outer sleeve and the tubing for forming a secondary seal. An inner sleeve can be received radially inside the outer sleeve, and one or more gaskets can be arranged between the inner sleeve and the tubing. Further, a jacket crimp can be applied against an end of the sleeve member to contact a jacket that at least partially covers the tubing.