A method for manufacturing a tube includes continuously moving a tubular hollow blank through an expansion tool, and supplying fluid to a space delimited by the expansion tool and the tubular hollow blank the such that a hydraulic pressure is applied inside the tubular hollow blank. The magnitude of the hydraulic pressure is selected such that the tubular hollow blank is deformed plastically. The disclosure also relates to an arrangement for manufacturing a tube.

A tube flaring tool, which is adapted to clamp a tube and align the tube with a punch driver, includes a carrier having a clamping assembly slot and a punch assembly slot; a clamping assembly received in the clamping assembly slot of the carrier to clamp a tube; and a punch assembly having a main member and a plurality of punches movably coupled to the main member. The main member is movably received in the punch assembly slot, so that the main member of the punch assembly is able to be moved to select one of the punches to flare the tube.

The present invention includes a mold set, a deformation generating element, and an engaging element. The mold set has a pipe storing channel, a deformation portion, and a positioning recess. The deformation generating element has a deformation generating portion and a pushing portion with an outer working thread. The engaging element has an axial positioning portion and a working channel with an inner working thread. Therefore, the deformation generating portion can move toward the deformation portion for pipe flare processing work and a view hole is provided for viewing. So, no threaded hole is required for the mold set. The view hole allows the user to inspect the pipe end's position being correct or not. The manufacturing for the engaging element is easy. The engaging element has a guiding function.

Tubes for use in ultrahigh pressure devices, and associated systems and methods of manufacture are disclosed herein. In one embodiment, a metal tube includes an elongate bore having a circular transverse cross-sectional shape. The metal tube also includes an elongate wall extending around the bore and having an annular transverse cross-sectional shape with an inner surface closest to the bore, an outer surface furthest from the bore, and a wall thickness extending from the inner surface to the outer surface. An inner portion of the wall is under swage-autofrettage-induced overall compressive stress.

Processes and systems for preparing pipe for machine processing to form pin and box ends for assembly into pipelines using mechanical press-fit pipe joints that are fully measured and documented during both manufacturing and assembly. Installed pipelines include pipeline data monitoring systems coupled to a pipeline data management center for receiving, archiving, and analysis of the data records to aid in administration, operation and management, and troubleshooting of pipelines.

A folded tube for a heat exchanger is disclosed. The tube includes first and second ends for connection to first and second headers of the heat exchanger. An outer wall of the tube provides at least two channels for carrying a heat exchange fluid between the first and second headers. At least one seam is formed in the outer wall extending the length of the tube, the seam including a pair of opposed flanges extending into the tube to form the two channels, the outer wall joined together along the seam. The tube further includes a first end region and a second end region, and an intermediate region. The tube flattened along its length to form at least two flattened lobes, each lobe including one of the channels, and the lobes in the intermediate region being flatter than the lobes in at least one of the end regions.

A method and a device for producing an outer pipe of a telescope-like support, for reasons of weight and stability, is produced from a standardized zinc-coated steel pipe having a large outer diameter and a small wall thickness. Also included is the telescope-like support and the outer pipe which is contained therein. A pipe portion of the outer pipe is expanded in the method with a punch and subsequently tapered to the original outer diameter again with a ring. A reinforcement of the pipe portion and a calibration of the outer diameter of the pipe portion are thereby achieved. An outer thread can be rolled on the pipe portion.

Disclosed is a pipe expanding punch for a drill, which is configured to expand a pipe by hitting the pipe by an anchor drill or a rechargeable drill. The pipe expanding punch includes: an expanding mandrel provided with at least one portion (hereinafter referred to as an expanding part) having an outer diameter larger than an inner diameter of a pipe to be expanded; and a holder formed integrally with the expanding mandrel and fixedly coupled to a drill such that the pipe is expanded using the drill, wherein the outer diameter of an introduction part of an end portion of the expanding mandrel is smaller than the inner diameter of the pipe, a first tapered step is provided between the introduction part and the expanding part, and at least one polished flat surface is formed by polishing the first tapered step.

An expansion tool for expanding an article. The expansion tool includes a lead-in portion extending outwardly from a first end of the expansion tool and a first pilot portion extending from the lead-in portion. The first pilot portion has a first diameter. The expansion tool further includes a second pilot portion being generally parallel with the first pilot portion. The second pilot portion has a second diameter larger than the first diameter. The expansion tool further includes a forming portion bridging the first pilot portion and the second pilot portion. The forming portion is generally sloped. The expansion tool further includes an expansion portion extending from the second pilot portion toward a second end of the expansion tool. The expansion portion has a third diameter larger than the second diameter.

A pipe expanding device with a pipe-length fixing assembly is suitable for holding a pipe with a connecting end, and includes: a body including a first space and a second space; a clamping unit detachably disposed in the first space, and provided for insertion of the pipe, wherein the connecting end of the pipe is able to move back and forth within the second space; and the pipe-length fixing assembly is disposed in the second space and able to move back and forth toward the first space, and the connecting end of the pipe is stopped against the pipe-length fixing assembly. The pipe expanding device is capable of precisely fixing the expanding length, and improving the sealing of the joint between expanded pipes, and the pipe expanding operation is not limited by the user's experience.