A pipe fitting having a first body and a second body that together at least partially define a fluid flow passage. The first body defines a first portion of the fluid flow passage that extends from a first end of the fluid flow passage to a first internal opening. The second body defines a second portion of the fluid flow passage that extends from a second internal opening to a second end of the fluid flow passage. The first body has a first interface surface that surrounds the first internal opening, the first interface surface having a plurality of anti-rotation grooves. The second body has a second interface surface that surrounds the second internal opening and engages with the first interface surface. The first internal opening is in fluid communication with the second internal opening. The second interface surface has a plurality of anti-rotation fingers that are each received by and engage with a corresponding one of the anti-rotation grooves. Rotation of the second body relative to the first body is resisted by the engagement of the anti-rotation fingers with the anti-rotation grooves.

A coupling fitting comprises a pipeline and a connector sleeve. The pipeline and connector sleeve are each separate parts and are fixedly and non-detachably connected to one another by a connecting ring which can be produced in situ by injection molding plastics material. The invention is also directed to a method for making the coupling fitting.

A coupling fitting comprises a pipeline and a connector sleeve. The pipeline and connector sleeve are each separate parts and are fixedly and non-detachably connected to one another by a connecting ring which can be produced in situ by injection molding plastics material. The invention is also directed to a method for making the coupling fitting.

A tube end form, including a first section including a first radially outward facing surface, a second section including a second radially outward facing surface, and a shoulder axially arranged between the first and second sections, the shoulder including a first frusto-conical surface arranged at a first angle relative to the first radially outward facing surface, and a second frusto-conical surface arranged at a second angle relative to the first radially outward facing surface.

A tube end form, including a first section including a first radially outward facing surface, a second section including a second radially outward facing surface, and a shoulder axially arranged between the first and second sections, the shoulder including a first frusto-conical surface arranged at a first angle relative to the first radially outward facing surface, and a second frusto-conical surface arranged at a second angle relative to the first radially outward facing surface.

Provided herein is a fluid duct (8) comprising a fluid duct connection end portion (12) for coupling to a component connection end portion (4) via a sealing ring (6), the fluid duct connection end portion comprising a clamping ring seat (14) configured for receiving an adjustable clamping ring therearound, the clamping ring seat (14) extending axially (A) between an entry flange (16) and a tube joining section (18), the tube joining section (18) extending into a fluid duct tube portion (10). The clamping ring seat (14) comprises an extension fold (20) configured to allow the clamping ring seat (14) to expand radially due to a widening of the expansion fold (20).

Provided herein is a fluid duct (8) comprising a fluid duct connection end portion (12) for coupling to a component connection end portion (4) via a sealing ring (6), the fluid duct connection end portion comprising a clamping ring seat (14) configured for receiving an adjustable clamping ring therearound, the clamping ring seat (14) extending axially (A) between an entry flange (16) and a tube joining section (18), the tube joining section (18) extending into a fluid duct tube portion (10). The clamping ring seat (14) comprises an extension fold (20) configured to allow the clamping ring seat (14) to expand radially due to a widening of the expansion fold (20).

A method for coupling a fitting to a tubing end includes pressing a collar over the outer surface of the tubing until the strain on the collar in the hoop direction is at a predetermined level, or pressing a collar with a predetermined axial load.

A method for coupling a fitting to a tubing end includes pressing a collar over the outer surface of the tubing until the strain on the collar in the hoop direction is at a predetermined level, or pressing a collar with a predetermined axial load.

A method for inhibiting separation of joined pipes including providing within a pipe bell a gasket including rigid segments, each segment having bell teeth configured for engaging the bell and a spigot tooth configured for engaging a pipe spigot seated in the bell. Upon pressurization and over-pressurization of the joint, resulting axial forces exerted on the joint, which can cause pipes to separate, are countered by wedging the segments between the bell and the spigot and rotating each segment so that the thrust forces are directed radially. To prevent radially-directed thrust forces from damaging the joint through over-rotation of the segments, the bell teeth and the spigot tooth are adapted and arranged to maintain the thrust forces load path carried by each segment within a desired angular range relative to the spigot by transferring the load path between adjacent bell teeth whereby the effective length of each segment is increased.