Pre-manufactured pie cut pieces provide internal cutouts such that the cutouts from one piece are complementary to the cutouts of an adjacent piece so that the pieces connect by an interlocking friction fit. A series of pie cut pieces can be connected this way in concatenated fashion to produce a section of curved piping. The joints between the joined pieces can be sealed by welding or other suitable sealing means.

A system for producing chemicals, such as, ethylene or gasoline, at high temperature (above 1100 degrees C.) having a feedstock source. The system includes a chemical conversion portion connected with the feedstock source to receive feedstock and convert the feedstock to ethylene or gasoline. The conversion portion includes a coil array and a furnace that heats the feedstock to temperatures in excess of 1100 C. or 1200 C. or even 1250 C. or even 1300 C. or even 1400 C. A method for producing chemicals, such as ethylene or gasoline, at high temperature.

An assembly including a ceramic body. The assembly comprises a tungsten coupling attached to the ceramic body with a first joint that forms a first helium tight seal between the ceramic body and the tungsten coupling and where the first helium tight seal maintains its integrity at a temperature over 400 C. The assembly includes a metal body attached to the tungsten coupling with a second joint that forms a second helium tight seal between the metal body and the tungsten coupling and where the second helium tight seal maintains its integrity at a temperature over 400 C. A method. A mixture. A coupling.

An assembly including a ceramic body. The assembly comprises a tungsten coupling attached to the ceramic body with a first joint that forms a first helium tight seal between the ceramic body and the tungsten coupling and where the first helium tight seal maintains its integrity at a temperature over 400 C. The assembly includes a metal body attached to the tungsten coupling with a second joint that forms a second helium tight seal between the metal body and the tungsten coupling and where the second helium tight seal maintains its integrity at a temperature over 400 C. A method. A mixture. A coupling.

In a first embodiment, at a time of magnetic pulse welding, a stepped tube profile machining process axially bores a walled tube from an end inward to a transition depth to form a section with a reduced wall thickness and then axially bores the walled tube from the transition depth to a fall off depth, thereby forming a section with a maximized welding wall section. In a second embodiment, also at a time of magnetic pulse welding, a surface angle tube profile machining process axially bores at a surface angle a walled tube from an end to a bore length to form an angular welding wall thickness inward to a maximized wall section. For both embodiments, the bored surfaces are virgin with no pits, oil, residue, or oxidation thereon, thus making the machined walled tubes available for immediate magnetic pulse welding.

An arrangement (6) of a pipe (5) on a funnel (4) has a pipe interior space (8) fluidically connected with a funnel interior space (9). The funnel has an integral connection piece (10) with two axial openings (12) in the circumferential direction (11). A connecting sleeve (14), which has a clamping collar (15), which tapers towards the funnel and is formed integrally in one piece with the connecting sleeve (14), is attached to the connection piece on the outside thereof. The pipe is attached to the connection piece with an end section (16) facing the funnel. The end section has a counterclamping collar (17), which is formed integrally in one piece therewith and tapers away from the funnel. A clamp connection (7) has a clamp (18) with a ring-shaped connecting body (19) extending over the clamping collar (15) and the counterclamping collar (17) and prestresses these axially towards one another.

A high strength joint material. A material for a joint between a ceramic body and a metal body. A material for a joint between a ceramic body and a ceramic body.

A fluidic device includes a planar structure constituted by a plurality of laminated layers and accommodating a fluid channel extending up to a surface of the planar structure, and a female adapter piece configured for a fluid-tight accommodation of a male adapter piece having a fluid conduit. The the female adapter piece is connected or connectable with the planar structure so that, when the male adapter piece is accommodated in the female adapter piece, the fluid conduit is brought in fluid-tight fluid communication with the fluid channel. The fluid channel is exposed to the female adapter piece at a lateral surface of the planar structure at which the laminated layers are exposed.

A pipe joint has a first pipe having an end portion and a first pipe wall thickness, and a second pipe having an end portion. The end portion of the first pipe is welded to the end portion of the second pipe to seal the joint between the first pipe and the second pipe. The first pipe has an outwardly-extending, buckle-inducing deformation that is spaced apart from the pipe joint. A crest height of the deformation is 500% or less of the first pipe wall thickness.

A pipe connecting structure includes a tube made of PERT (polyethylene of raised temperature resistance) or PEX (crosslinked polyethylene) having a light-pervious or light-absorption color and a tubular connector made of PP (polypro pylene), PE (poly ethylene), POM (polyformaldehyde) or PA (polyamide) having a light-absorption or light-pervious color. One end of the tube and one end of the tubular connector are mated with each other to be welded together by laser welding with parameters including a power in the range of 13-28 W and a rotational speed in the range of 45-50 rpm. The strength of the pipe connecting structure is up to 500 psi when making a burst pressure test. The strength of the pipe connecting structure is two-three times as much as the original PERT tubular connector.