Abstract: A method of monitoring a portion of an equipment under pressure implementing a control station to control an ultrasonic non-destructive testing device through a remote network, includes: the control station sends a first measurement request to the non-destructive testing device; the control station receives a first plurality of measurement data from the non-destructive testing device, constructs a first mapping of the portion of the structure from the data; sends a second measurement request to the non-destructive testing device, receives a second plurality of measurement data from the non-destructive testing device, constructs a second mapping of the portion of the structure, from the second plurality of measurement data, and compares the first mapping and the second mapping.

Abstract: The invention relates to a method for replacing tubes in a hydrocarbon-vapor reforming unit, that comprises before launching any new production campaign: measuring the expansion of the tube diameters; taking X-ray photographs of the tubes; realizing replicas of the surfaces of the tubes; wherein a tube is replaced when it fulfills at least one of the following conditions; the diameter expansion is higher than 3%; the X-ray photograph includes at least one crack; the replica shows a sufficient thermal ageing and/or creep deformation.

Abstract: The invention relates to a method for replacing tubes in a hydrocarbon-vapour reforming unit, that comprises before launching any new production campaign: measuring the expansion of the tube diameters; taking X-ray photographs of the tubes; realizing replicas of the surfaces of the tubes; wherein a tube is replaced when it fulfils at least one of the following conditions; the diameter expansion is higher than 3%; the X-ray photograph includes at least one crack; the replica shows a sufficient thermal ageing and/or creep deformation.

Abstract: The invention relates to a method of protecting equipment intended to operate at high temperature in the presence of a fluid containing at least one hydrocarbon and/or carbon monoxide against corrosion by metal dusting, method in which pieces of the equipment are made from an alloy containing nickel, iron, chromium and/or aluminum, and in which said pieces of the equipment are protected from said corrosion by a protective coating. This method is characterized in that said equipment pieces protected in this way are connected to each other by means of joining pieces, said joining pieces being protected beforehand by a protective coating over at least part of their surface intended to be brought into contact with said fluid at high temperature, and in that each of the connections intended to be subjected to said corrosion is produced by external welding of the ends of the joining piece with said pieces of equipment.

Abstract: The invention concerns a method for non-destructive ultrasonic control, combining time-of-flight diffraction (TOFD) and inclined longitudinal wave techniques, of weld joints assembling two abutted parts. The method consists of using the time-of-flight diffraction technique, displacing in the longitudinal or circumferential direction, along the weld joint to be controlled, at least one pair consisting of a first transducer and of a second transducer, one transmitting and the other receiving ultrasonic waves, these transducers being laterally positioned on either side of the joint to be controlled, these transducers comprising piezoelectric ceramics or crystals. Furthermore, it consists of displacing along the welded joint to be controlled, using the inclined longitudinal wave technique, at least a third transducer, so as to detect any defect of the joint located at a thickness ranging between 0.5 mm and 15 mm.

Abstract: The invention concerns a method for non-destructive ultrasonic control, combining time-of-flight diffraction (TOFD) and inclined longitudinal wave techniques, of weld joints assembling two abutted parts. The method consists of using the time-of-flight diffraction technique, displacing in the longitudinal or circumferential direction, along the weld joint to be controlled, at least one pair consisting of a first transducer and of a second transducer, one transmitting and the other receiving ultrasonic waves, these transducers being laterally positioned on either side of the joint to be controlled, these transducers comprising piezoelectric ceramics or crystals. Furthermore, it consists of displacing along the welded joint to be controlled, using the inclined longitudinal wave technique, at least a third transducer, so as to detect any defect of the joint located at a thickness ranging between 0.5 mm and 15 mm.

Abstract: A method for producing a plate heat exchanger with multiple plates made of a solderable material. The plated define circuits for fluid circulation and are assembled together by soldering. The soldering is done after a soldering material is applied to the regions to be soldered. The soldering material is deposited on the plates with an electrolytic solution.

Abstract: The invention relates to a method of protecting equipment intended to operate at high temperature in the presence of a fluid containing at least one hydrocarbon and/or carbon monoxide against corrosion by metal dusting, method in which pieces of the equipment are made from an alloy containing nickel, iron, chromium and/or aluminum, and in which said pieces of the equipment are protected from said corrosion by a protective coating. This method is characterized in that said equipment pieces protected in this way are connected to each other by means of joining pieces, said joining pieces being protected beforehand by a protective coating over at least part of their surface intended to be brought into contact with said fluid at high temperature, and in that each of the connections intended to be subjected to said corrosion is produced by external welding of the ends of the joining piece with said pieces of equipment.

Abstract: The invention concerns a method for making a plate heat exchanger, comprising a plurality of plates made of a solderable material defining circuits for fluid circulation and assembled together by soldering, said soldering being carried out after depositing a soldering material on the zones to be soldered. Said soldering material is deposited using an electrolytic solution. The invention is applicable to evaporators/condensers of air separating appliances.