A lighting pole is disclosed, which includes a hollow tube, and at least two nonintersecting walls extending over an axial length of the hollow tube to divide an interior of the hollow tube into at least three isolated chambers. At least one of the three isolated chambers defines a gap separating at least two of the isolated chambers.

A lighting pole is disclosed, which includes a hollow tube, and at least two nonintersecting walls extending over an axial length of the hollow tube to divide an interior of the hollow tube into at least three isolated chambers. At least one of the three isolated chambers defines a gap separating at least two of the isolated chambers.

A method for solid-state, one-shot, butt-welding of multiple coaxial metal pipe subassemblies that have a prescribed annular clearance to allow them to be welded separately yet simultaneously is described. The nested pipes or tubes making up of these subassemblies can thus be joined end to end to form pipelines or wells for oil, gas and geothermal and the like with specific desired advantages over conventional single-wall pipelines or wells casings. The advantages include an ability to monitor the condition of all or selected portions of the pressure envelope constituted by the pipeline or well casing and thereby identify damage with ample advance warning before failure and leakage or major spills occur.

An insulated joint in a pipe-in-pipe system comprises a weld that connects two inner pipes while respective outer pipes circumferentially enclose the inner pipes and terminate at a position distal from the weld. Respective rings are coupled to the inner pipes at the distal position and the outer pipes are welded to the rings. A joint insulation material covers the weld, and a sleeve segment covers the weld and joint insulation material. Preferably, the sleeve segment is formed from two half-pipe sleeve portions and welded to the rings to so secure the sleeve segment to the joined pipe-in-pipe segments. Contemplated pipe-in-pipe systems have significantly reduced thermal loss and provide strength sufficient for a pipe laying process that includes pipe bending and pipe straightening.

A member includes a first tubular component including a tubular portion having a tubular shape, and a second tubular component including a tubular portion having a tubular shape and disposed coaxially with the first tubular component. The first tubular component includes a plurality of projecting portions configured to project from one end of the tubular portion of the first tubular component in an axial direction and spaced from each other in a circumferential direction. The first tubular component and the second tubular component are joined with each other such that each of the plurality of projecting portions is joined with the second tubular component. Each of the plurality of projecting portions includes a distal end portion joined with the second tubular component and a base portion separated from the second tubular component.

A method of connecting a pipe and a hose includes providing a transition assembly including a hose end, a pipe end opposite the hose end, and an inner surface defining a transition assembly passage extending through the transition assembly from the hose end to the pipe end, engaging the hose end of the transition assembly with the hose such that a first connection is formed between the transition assembly and the hose, and engaging the pipe end of the transition assembly with the pipe such that a second connection between the transition assembly and the pipe is formed. The second connection is spaced an axial distance from the first connection.