A tube unit includes multiple tubes, a bundling portion that bundles end portions of the tubes, and pipe elements that are inserted into respective end portions of the tubes and support the end portions of the tubes from inside. A degassing module includes the tube unit and a housing in which the tube unit is accommodated and that separates inside spaces inside the respective tubes from an outside space outside the tubes. In addition, each tube is a tubular membrane that allows gas to pass therethrough and prohibits liquid from passing therethrough. The housing has an inside-space opening that is in communication with the inside spaces of the tubes and an outside-space opening that is in communication with the outside space of the tubes.

A carrier pipe is protected from corrosion by being received inside a casing at a location above ground. The casing, which can be formed from a polymer, defines a gap extending around an exterior surface of the carrier pipe. In one embodiment, the gap is substantially filled with a potting material having a corrosion-resistant property. In another embodiment, a self-contained impressed current cathodic protection system is received in the gap. A pull head is installed on the carrier pipe and/or casing for pulling the pipe assembly, including carrier pipe, casing, and elements received in the gap, into an underground bore as a single unit. In some embodiments multiple pipe assemblies are pulled together into the same bore.

A double wall tube assembly includes an inner tube extending in an axial direction between two opposed ends of the inner tube. A sleeve fitting is mounted to one end of the inner tube. An outer tube outboard of the inner tube extends in the axial direction between two opposed ends of the outer tube. A collar fitting is mounted to one end of the outer tube wherein the collar fitting is outboard of the sleeve fitting.

In various embodiments, multi-conduit assemblies 100 comprise pluralities of individual or distinct conduits 101 joined by various forms of webs 110, sleeves 176, wraps 222, 212, and/or retainers 181. Assemblies 100 are useful for fluid, electrical, communications, and other applications.

A duct bank assembly may include an elongate extending conduit with a length for receiving and passing through a cable or wire and an encasing body encasing the conduit along its longitudinal extent between a first mating end and an opposed second mating end of the body. Each mating end of the at least one elongate conduit has a male or female mating end for joining with a corresponding male or female mating end of an abutting duct bank assembly in a self-locking, self-sealing joint.

The subject matter of this specification can be embodied in, among other things, a fuel delivery component, a substantially rigid, unitary structure formed as a single piece of material, and at least a first seamless lumen defined by the unitary structure as a first loop.

A heat-insulated pipe assembly includes a pipe allowing a fluid to flow therethrough, and a heat insulating member covers at least a part of the pipe. The pipe is used in an exhaust gas purification system using an SCR catalyst. The heat insulating member has a closed-cell structure and suppresses an increase in a temperature of the fluid due to heat exchange with air. In the exhaust gas purification system using the SCR catalyst, the interior of the pipes is thermally insulated from the exterior by the heat insulating member. Thereby an increase in the temperature of the fluid flowing through the pipe due to heat exchange with air is suppressed.

A piping structure includes a plurality of pipes that connects a plurality of process modules disposed adjacent to each other at a first room and a plurality of vacuum pumps disposed at a second room below the first room to be corresponding to the plurality of process modules, respectively. The plurality of pipes are divided into a plurality of blocks in a height direction, and the plurality of pipes used for blocks in an identical height have an identical shape.

A subsea riser is installed by lowering at least one riser conduit to the seabed when piggybacked to an elongate support that comprises at least one flowline. The elongate support may be a pipeline bundle, which may be attached to one or more towheads in a towable bundle unit. The riser conduit may be in fluid communication with the flowline. At the seabed, a free end portion of the riser conduit is detached from the elongate support by releasing subsea-releasable fastenings. Then, with the elongate support and a root end of the riser remaining at the seabed, the detached free end portion of the riser conduit is lifted away from the elongate support to a riser support, such as a platform, an FPSO (floating production, storage and offloading vessel), or a buoy.

A tube arrangement for the transport of temperature control medium, comprising a base body (2) made of polymeric material and produced by means of blow molding, wherein at least one functional element (3) is arranged in the base body (2), which element is in operative connection with the temperature control medium.