A method of fabricating a conduit comprises steps of attaching a first tubular-outboard-ply end of a tubular outboard ply to a first inner collar portion of a first collar with a third weld and attaching a second tubular-outboard-ply end to a second inner collar portion of a second collar with a fifth weld. The method additionally comprises steps of interconnecting the first inner collar portion and a first outer collar portion of the first collar with a first weld and interconnecting the second inner collar portion and a second outer collar portion of the second collar with a sixth weld. The method also comprises attaching a trimmed first corrugated-inboard-ply end to the first outer collar portion with a second weld, attaching a trimmed second corrugated-inboard-ply end to the second outer collar portion with a fourth weld, and communicatively coupling a first sensor with an interstitial space.

A tube arrangement comprising a first metal tube, a second metal tube, a first sleeve part, and a second sleeve part. The first and second sleeve parts are threadedly connected to the first and second metal tubes. The first and second metal tubes are configured to be joined via a butt weld joint. The first sleeve and the second sleeve are configured to be joined via a second butt weld joint. The first sleeve part comprises a first outer surface extending at a first acute angle (α) to an axial center axis of the first sleeve part and the second sleeve part comprises a second outer surface extending at a second acute angle (β) to an axial center axis of the second sleeve part. The present disclosure also relates to a furnace.

A method of fabricating a conduit comprises steps of attaching a first tubular-outboard-ply end of a tubular outboard ply to a first inner collar portion of a first collar with a third weld and attaching a second tubular-outboard-ply end to a second inner collar portion of a second collar with a fifth weld. The method additionally comprises steps of interconnecting the first inner collar portion and a first outer collar portion of the first collar with a first weld and interconnecting the second inner collar portion and a second outer collar portion of the second collar with a sixth weld. The method also comprises attaching a trimmed first corrugated-inboard-ply end to the first outer collar portion with a second weld, attaching a trimmed second corrugated-inboard-ply end to the second outer collar portion with a fourth weld, and communicatively coupling a first sensor with an interstitial space.

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.

A conduit for transporting a fluid comprises a first collar, a second collar, and a bellows. The bellows comprises a corrugated inboard ply, a corrugated outboard ply, and an interstitial space, interposed between the corrugated inboard ply and the corrugated outboard ply. The conduit additionally comprises a second weld, hermetically coupling the corrugated inboard ply and a first outer collar portion, a third weld, hermetically coupling the corrugated outboard ply and a first inner collar portion, a fourth weld, hermetically coupling the corrugated inboard ply and a second outer collar portion, a fifth weld, hermetically coupling the corrugated outboard ply and a second inner collar portion, and a first sensor, communicatively coupled with the interstitial space.

A piping device that includes two parts, each consisting of two concentric rings joined together by a solid steel mantle that when assembled produce a confined space between the pieces of at least 50 mm and house a guide wedge and an elastomeric ring that It produces the hydraulic seal and the thickness of this solid steel mantle and the assembly area between the cavity and the guide wedge is at least twice the thickness of the pipe. The heat of the welding process between the external concentric rings is released by the device itself and the temperature inside the pipe does not exceed 120+/20 C., eliminating any possible internal corrosion in the areas of the welded joints, since it prevents damage to the internal lining and increases the useful life of the pipe during it operation.

A conduit (100) for transporting a fluid comprises a first collar (102), a second collar (103), and a bellows (108). The bellows (108) comprises a corrugated inboard ply (110), a corrugated outboard ply (112), and an interstitial space (126), interposed between the corrugated inboard ply (110) and the corrugated outboard ply (112). The conduit additionally comprises a second weld (138), hermetically coupling the corrugated inboard ply (110) and a first outer collar portion (104), a third weld (134), hermetically coupling the corrugated outboard ply (112) and a first inner collar portion (106), a fourth weld (186), hermetically coupling the corrugated inboard ply (110) and a second outer collar portion (105), a fifth weld (184), hermetically coupling the corrugated outboard ply (112) and a second inner collar portion (107), and a first sensor (116), communicatively coupled with the interstitial space (126).

A tube arrangement comprising a first metal tube, a second metal tube, a first sleeve part, and a second sleeve part. The first and second sleeve parts are threadedly connected to the first and second metal tubes. The first and second metal tubes are configured to be joined via a butt weld joint. The first sleeve and the second sleeve are configured to be joined via a second butt weld joint. The first sleeve part comprises a first outer surface extending at a first acute angle () to an axial centre axis of the first sleeve part and the second sleeve part comprises a second outer surface extending at a second acute angle () to an axial centre axis of the second sleeve part. The present disclosure also relates to a furnace.

An end product and system for connecting large aluminum tubular pipe segments into an Isolated Phase Bus comprising reducing the diameter (or increasing the same) of one end of a tubular segment and sliding it into (or over) the untreated end of an adjacent pipe or tubular segment, followed by a tubular and circumferential welding of the same. The outside or inside circumference of the connected segments are uniform from distal to proximal end of the overall length of the connected tubular segments. A structural integral, axially aligned, simplified set of connectable tubular segments allows for a grounded connection between power generators and step transformers. Preferably, the overall diameter change of the necked down flange (or outwardly flared flange) of one tubular segment is less than or only slightly greater than twice the material wall thickness of the tubular segment's initial pre-rolled flat aluminum sheet material.

The present patent application corresponds to an easy-to-manufacture device which eliminates all possible internal corrosion in the areas of welded joints of carbon steel pipes because it prevents damage to the inner coating during the welding process, increasing its useful live importantly.

The device consists of two parts that are welded in the workshop to the ends of each pipe. These parts have the same external diameter where the welded joint is done during the construction of the pipeline. The heat released in this process is dissipated by the device which prevents the temperature of the pipe wall from exceeding 120+/20 C., a condition that can withstand all types of coatings with paints designed for fluid pipelines.