A mechanical branch outlet including: a housing having an outer surface and an inner surface and defining an outlet bore extending between the outer surface and the inner surface; and an insert having a first end and a second end, the outlet bore of the housing sized to receive the second end of the insert and retain the first end of the insert.

A crimp fitting comprises a metal tube wall that forms both a cylindrical tube portion and an adjacent annular O-ring channel portion. The tube wall has a first wall thickness along the cylindrical tube portion and a second wall thickness along at least part of the O-ring channel portion. The second wall thickness is less than the first wall thickness. The cylindrical tube portion and O-ring channel are configured and adapted to encircle a cylindrical end portion of a tube when such end portion of the tube is inserted into the fitting.

A crimp fitting comprises a metal tube wall that forms both a cylindrical tube portion and an adjacent annular O-ring channel portion. The tube wall has a first wall thickness along the cylindrical tube portion and a second wall thickness along at least part of the O-ring channel portion. The second wall thickness is less than the first wall thickness. The cylindrical tube portion and O-ring channel are configured and adapted to encircle a cylindrical end portion of a tube when such end portion of the tube is inserted into the fitting.

A fitting assembly includes a first fitting that is configured to receive a first fluid tube and a second fitting that is configured to receive a second fluid tube. The first fitting defines a first groove. The second fitting includes a spring that is configured to engage the first groove to connect the first and second fittings such that the first and second fluid tubes are placed in fluid communication and a fluid tight seal is established between the first and second sealing fittings.

A fitting assembly includes a first fitting that is configured to receive a first fluid tube and a second fitting that is configured to receive a second fluid tube. The first fitting defines a first groove. The second fitting includes a spring that is configured to engage the first groove to connect the first and second fittings such that the first and second fluid tubes are placed in fluid communication and a fluid tight seal is established between the first and second sealing fittings.

A coupling device for releasably connecting fluid-carrying duct ends of ducts is provided. The duct ends, respectively, each carry a jacket having at least two annular ribs housing a first annular sealing element. The first annular sealing element is engaged by the inner shell. The coupling device includes an outer shell that has radially inward extending ribs or rib portions, which are either arranged in an axial distance with respect to a further annular rib of the jackets or engage an axial recess provided on the jackets defined between the further annular rib and a fourth annular rib.

A coupling device for releasably connecting fluid-carrying duct ends of ducts is provided. The duct ends, respectively, each carry a jacket having at least two annular ribs housing a first annular sealing element. The first annular sealing element is engaged by the inner shell. The coupling device includes an outer shell that has radially inward extending ribs or rib portions, which are either arranged in an axial distance with respect to a further annular rib of the jackets or engage an axial recess provided on the jackets defined between the further annular rib and a fourth annular rib.

A lockable pipeline seal, pipeline sleeve, and sealed pipeline connection for a pipeline. The pipeline seal includes a ring-shaped body having a head along a first ring end and a tail along a second ring end of the ring-shaped body, with a body portion therebetween. The ring-shaped body has an outer surface and an inner surface along its periphery. A deflection surface and abase surface are defined along the outer surface. The deflection surface is at an angle to a horizontal axis of the ring-shaped body, and a recessed grip is defined along the inner surface. The ring-shaped body is compressible such that, when the pipeline seal is installed between the pipeline sleeve and the pipeline pipe, the deflection surface is urged against the pipeline pipe and the recessed grip grippingly engages the pipeline sleeve whereby a locked seal is formed between the pipeline sleeve and the pipeline pipe.

A lockable pipeline seal, pipeline sleeve, and sealed pipeline connection for a pipeline. The pipeline seal includes a ring-shaped body having a head along a first ring end and a tail along a second ring end of the ring-shaped body, with a body portion therebetween. The ring-shaped body has an outer surface and an inner surface along its periphery. A deflection surface and abase surface are defined along the outer surface. The deflection surface is at an angle to a horizontal axis of the ring-shaped body, and a recessed grip is defined along the inner surface. The ring-shaped body is compressible such that, when the pipeline seal is installed between the pipeline sleeve and the pipeline pipe, the deflection surface is urged against the pipeline pipe and the recessed grip grippingly engages the pipeline sleeve whereby a locked seal is formed between the pipeline sleeve and the pipeline pipe.

A connector for a process tube, comprising an annular body; an engagement bore formed in the annular body, for receiving an end of the process tube; a sealing groove formed in the engagement bore, for receiving at least two annular gaskets for contacting the end of the process tube; wherein the annular body comprises a sealing port fluidly connected with the sealing groove so as to allow applying a gas pressure in the sealing groove between the at least two annular gaskets.