A method and a system which includes a semi-rigid pipe (SRP) disposed inside a first existing pipe and two coupling assemblies disposed over and sealingly coupled to the ends of the SRP. Each assembly includes: a coupling with a nipple configured to receive and be disposed inside the SRP; and a compression nut that includes an inner surface that tapers inward such that threading the compression nut onto the coupling presses the semi-rigid pipe against the nipple to form a fluid-tight seal. Also disclosed is a supersystem comprising a plurality of such systems.

A method and a system which includes a semi-rigid pipe (SRP) disposed inside a first existing pipe and two coupling assemblies disposed over and sealingly coupled to the ends of the SRP. Each assembly includes: a coupling with a nipple configured to receive and be disposed inside the SRP; and a compression nut that includes an inner surface that tapers inward such that threading the compression nut onto the coupling presses the semi-rigid pipe against the nipple to form a fluid-tight seal. Also disclosed is a supersystem comprising a plurality of such systems.

This disclosure relates to a hose assembly (1) including a fluid passage (11), a male coupler (12) and a blocker (13). The fluid passage (11) has an outlet (1112a). The male coupler (12) is rotatably sleeved on the fluid passage (11) at the outlet (1112a). The blocker (13) is protruded from the fluid passage (11) at the outlet (1112a) to restrict detachment of the male coupler (12) from the outlet (1112a) of the fluid passage (11).

A recreational vehicle waste delivery system with lengths of 3D cylindrical non-flexible tube and of 3D cylindrical flexible-tube, a first-coupler and, a second-coupler. The first coupler, the at least one flexible-tube, the second-coupler and the at least one flexible-tube in combination are able to be removably couplable modularly in series to provide an adjustable, modular waste management system for delivering waste from an rv to an in-ground sewer connection when engaged with a disposal fitting of the rv.

A recreational vehicle waste delivery system with lengths of 3D cylindrical non-flexible tube and of 3D cylindrical flexible-tube, a first-coupler and, a second-coupler. The first coupler, the at least one flexible-tube, the second-coupler and the at least one flexible-tube in combination are able to be removably couplable modularly in series to provide an adjustable, modular waste management system for delivering waste from an rv to an in-ground sewer connection when engaged with a disposal fitting of the rv.

The present invention provides a steel wire pre-embedded integrated full-bore acid fracturing hose assembly, including a hose that sequentially includes an inner liner, an internal adhesive layer, a steel wire layer, and an external adhesive layer from inside out; and, a joint that includes a protective sleeve disposed between the external adhesive layer and the steel wire layer, a locking sleeve sleeved on an outer side of the internal adhesive layer, and an outer sleeve disposed outside the inner liner, which are sequentially disposed from inside out along an axial direction of the hose; an outer circumferential surface of the locking sleeve is provided with a tooth groove, and a steel wire of the steel wire layer is embedded in the tooth groove and locked; and the outer sleeve is in a threaded connection with the locking sleeve and the protective sleeve.

The present invention provides a steel wire pre-embedded integrated full-bore acid fracturing hose assembly, including a hose that sequentially includes an inner liner, an internal adhesive layer, a steel wire layer, and an external adhesive layer from inside out; and, a joint that includes a protective sleeve disposed between the external adhesive layer and the steel wire layer, a locking sleeve sleeved on an outer side of the internal adhesive layer, and an outer sleeve disposed outside the inner liner, which are sequentially disposed from inside out along an axial direction of the hose; an outer circumferential surface of the locking sleeve is provided with a tooth groove, and a steel wire of the steel wire layer is embedded in the tooth groove and locked; and the outer sleeve is in a threaded connection with the locking sleeve and the protective sleeve.

An inlet locking collar assembly for a hose reel enclosure is provided. The collar assembly can include a securing member, an inlet member, and a collar. The securing member can include an arm and a clip. The inlet member can include a first end, a second end, and a channel. The first end can be configured to be in fluid communication with a fluid source. The second end can be configured to receive an outlet member. The channel can be configured to receive the arm. The collar can include a first edge, a second edge, a flange, and a recess. The first edge can be configured to receive the outlet member. The second edge can be configured to receive the inlet member. The flange can include a notch configured to receive the clip. The recess configured to receive the arm.

An inlet locking collar assembly for a hose reel enclosure is provided. The collar assembly can include a securing member, an inlet member, and a collar. The securing member can include an arm and a clip. The inlet member can include a first end, a second end, and a channel. The first end can be configured to be in fluid communication with a fluid source. The second end can be configured to receive an outlet member. The channel can be configured to receive the arm. The collar can include a first edge, a second edge, a flange, and a recess. The first edge can be configured to receive the outlet member. The second edge can be configured to receive the inlet member. The flange can include a notch configured to receive the clip. The recess configured to receive the arm.

A rotary union for a hose reel enclosure includes an inlet member in fluid communication with a fluid source. The rotary union further includes an outlet member rotatably disposed in the inlet member. The outlet member includes a first terminal in fluid communication with the inlet member and a second terminal in fluid communication with a hose in the hose reel enclosure. The rotary union also includes an inlet locking collar assembly. This design allows for efficient fluid transfer between the fluid source and the hose reel enclosure, providing a reliable and secure connection.