Abstract: Method for producing coated assembly parts for chemical device elements including the following steps: (a) the formation of an initial assembly including a steel support part, a zirconium or zirconium alloy coating, and at least one brazing material between the support part and the coating; (b) the insertion of the initial assembly into a brazing chamber with a controlled atmosphere; (c) the formation of a controlled atmosphere in said chamber; and (d) the reheating of said assembly to a temperature at least equal to the melting temperature of said brazing material.

Abstract: Method for producing coated assembly parts for chemical device elements including the following series of steps: (a) the formation of an initial assembly including a steel support part, typically a plate, a zirconium or zirconium alloy coating, typically a sheet having dimensions similar to those of the steel plate, and at least one brazing material between the support part and the coating, wherein said brazing material is an alloy including silver and copper; (b) the insertion of the initial assembly into a brazing chamber with a controlled atmosphere; (c) the formation of a controlled atmosphere in said chamber; (d) the reheating of said assembly to a temperature at least equal to the melting temperature of said brazing material; wherein, prior to the formation of said initial assembly, the deposition of a titanium or titanium alloy layer on said zirconium (or zirconium alloy) coating is performed, and in that said coating is placed so that its titanium- or (titanium alloy-) coated surface is in contact w

Abstract: The vessel of the invention includes a side wall and an end wall, and is characterized in that the end wall is a domed end wall, of thickness EI including an inner layer CI providing corrosion resistance and an outer layer CE of thickness EE at least equal to the thickness EI of the inner layer CI. The inner and outer layers are rigidly joined by a first assembly device. Inner layer CI is formed from a multilayer material including an internal layer CI for providing corrosion resistance and an external layer CIS, the internal CIC and the external CIS layers being rigidly joined by a second assembly device. The invention enables inexpensive manufacture of large vessels.

Abstract: Method for producing coated assembly parts for chemical device elements including the following series of steps: (a) the formation of an initial assembly including a steel support part, typically a plate, a zirconium or zirconium alloy coating, typically a sheet having dimensions similar to those of the steel plate, and at least one brazing material between the support part and the coating, wherein said brazing material is an alloy including silver and copper; (b) the insertion of the initial assembly into a brazing chamber with a controlled atmosphere; (c) the formation of a controlled atmosphere in said chamber; (d) the reheating of said assembly to a temperature at least equal to the melting temperature of said brazing material; wherein, prior to the formation of said initial assembly, the deposition of a titanium or titanium alloy layer on said zirconium (or zirconium alloy) coating is performed, and in that said coating is placed so that its titanium- or (titanium alloy-) coated surface is in contact w

Abstract: The aim of the present invention is a manufacturing process for assembly parts (101, 102, 111, 112) for the manufacture of elements of chemical devices (100), comprising the fixation of an anticorrosion metallic coating (31, 32) on an unprocessed assembly part (21, 22), by means of an operation comprising a brazing operation under a controlled atmosphere and, possibly, the shaping of the coated part (101, 102), by plastic deformation. The brazing temperature is preferentially less than approximately 750° C., and more preferentially between 600° C. and 720° C. The process according to the invention makes it possible to fix solidly on a steel plate an anticorrosion coating with a thickness less than 1 mm.

Abstract: The aim of the present invention is a process for manufacturing a plated product (1) comprising a support part in steel (2) and an anticorrosion metallic coating (3), characterized in that the anticorrosion coating (3) is fixed on the support part (2) by controlled-atmosphere brazing, in particular by vacuum brazing. The process according to the invention makes it possible to fix solidly an anticorrosion coating with a thickness smaller than 1 mm on a steel plate.

Abstract: The aim of the present invention is a process for manufacturing a plated product (1) comprising a support part in steel (2) and an anticorrosion metallic coating (3), characterized in that the anticorrosion coating (3) is fixed on the support part (2) by controlled-atmosphere brazing, in particular by vacuum brazing. The process according to the invention makes it possible to fix solidly an anticorrosion coating with a thickness smaller than 1 mm on a steel plate.

Abstract: The aim of the present invention is a manufacturing process for assembly parts (101, 102, 111, 112) for the manufacture of elements of chemical devices (100), comprising the fixation of an anticorrosion metallic coating (31, 32) on an unprocessed assembly part (21, 22), by means of an operation comprising a brazing operation under a controlled atmosphere and, possibly, the shaping of the coated part (101, 102), by plastic deformation. The brazing temperature is preferentially less than approximately 750° C., and more preferentially between 600° C. and 720° C. The process according to the invention makes it possible to fix solidly on a steel plate an anticorrosion coating with a thickness less than 1 mm.

Abstract: The aim of the present invention is a process for manufacturing a plated product (1) comprising a support part in steel (2) and an anticorrosion metallic coating (3), characterized in that the anticorrosion coating (3) is fixed on the support part (2) by controlled-atmosphere brazing, in particular by vacuum brazing. The process according to the invention makes it possible to fix solidly an anticorrosion coating with a thickness smaller than 1 mm on a steel plate.

Abstract: A bellows for connecting hoses or apparatus operating in a partial vacuum including a corrugated tube reinforced on the outside by rings at the troughs of the corrugations. The tube further includes toric reinforcing rings on the inside of the crests of the corrugations, the length of the rings being adjustable so as to adapt to the deformation of the corrugations in service.

Abstract: A magnetically drive centrifugal pump comprises a fixed assembly formed by a pump barrel made of a carbonaceous material, rigid annular bearings and a non-magnetic, non-electrically conductive sealing shell, and a rotating assembly formed by an impeller made of a carbonaceous material, a cylindrical rotor made of a carbonaceous material and having sealed therein permanent tracking magnets. The rotor is fixed directly to the impeller to form an impeller-rotor assembly which rests on the annular bearings. The driver includes magnets which interact with the permanent tracking magnets of the rotor in order to drive the pump, the driver being isolated from the impeller-rotor assembly by the sealing shell. The impeller-rotor assembly includes a secondary circuit for circulation of transported fluid located between the impeller-rotor assembly and the sealing shell.