Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
  • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
  • F16L55/07—Arrangement or mounting of devices, e.g. valves, for venting or aerating or draining
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
  • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
  • B23K26/20—Bonding
  • B23K26/21—Bonding by welding
  • B23K26/24—Seam welding
  • B23K26/28—Seam welding of curved planar seams
  • B23K26/282—Seam welding of curved planar seams of tube sections
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups B23K1/00 - B23K28/00
  • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by any single one of main groups B23K1/00 - B23K28/00 relating to soldering or welding
  • B23K31/027—Making tubes by soldering or welding
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K9/00—Arc welding or cutting
  • B23K9/02—Seam welding; Backing means; Inserts
  • B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
  • B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K9/00—Arc welding or cutting
  • B23K9/16—Arc welding or cutting making use of shielding gas
  • B23K9/164—Arc welding or cutting making use of shielding gas making use of a moving fluid
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K9/00—Arc welding or cutting
  • B23K9/24—Features related to electrodes
  • B23K9/28—Supporting devices for electrodes
  • B23K9/29—Supporting devices adapted for making use of shielding means
  • B23K9/291—Supporting devices adapted for making use of shielding means the shielding means being a gas
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K9/00—Arc welding or cutting
  • B23K9/32—Accessories
  • B23K9/325—Devices for supplying or evacuating shielding gas
  • B23K9/326—Purge gas rings, i.e. devices for supplying or evacuating shielding gas inside of hollow or tubular articles, e.g. pipes, vessels
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K2101/00—Articles made by soldering, welding or cutting
  • B23K2101/04—Tubular or hollow articles
  • B23K2101/06—Tubes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
  • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
  • B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
  • B23K37/02—Carriages for supporting the welding or cutting element
  • B23K37/0276—Carriages for supporting the welding or cutting element for working on or in tubes

Definitions

• the proposed technology generally relates to devices that removes water and vapor from sections of water carrying pipe in order to enable a welding operation in these particular sections.
• the proposed technology also relates to a method for removing water and vapor from water pipes and a method for performing welding on water carrying pipes.
• a device for removing vapor from a section of a water pipe to enable welding in the section the device being adapted to be inserted into the water pipe.
• the device comprises a first component comprising at least one gas transferring channel adapted to be connected to an external pressurized gas supply.
• the device also comprises a second component adapted to be inserted into the water pipe, the second component having an elongated shape and being connected to the first component at a first end and comprising an gas outlet part adapted to face the direction of incoming vapor, the second component further comprising at least one gas transferring channel adapted to convey gas from the external pressurized gas supply to the gas outlet part through the channel comprised in the first component to enable pressurized gas to exit the second component through the gas outlet part in a direction toward the vapor to thereby steer the vapor away from a region of the pipe where welding are to be performed.
• a method for removing vapor from parts of water pipe by utilizing a device according to the first aspect to thereby enable welding on the parts comprises the step of inserting, through an open pipe joint in the water pipe located in the vicinity of the part of the water pipe where welding is to be performed, the second component in such a way that the gas outlet part is facing in the direction of the vapor.
• the method also comprises the step of connecting the first component of the device to an external pressurized gas supply.
• the method also comprises the step of allowing gas from the external pressurized gas supply to flow through channels in the first and second component and exit the device through the gas outlet part in a direction facing the vapor to thereby steer the incoming vapor away from the part of the water pipe where welding is to be performed.
• a method for performing welding in parts of a water carrying pipe comprises the step of identifying the part of the water carrying pipe where welding are to be performed.
• the method also comprises the step of opening water pipe joints in vicinity of the identified part.
• the method also comprises the step of removing vapor from the water pipe by means of a method according to the second aspect.
• the method also comprises the step of performing welding on the identified part of the pipe.
• Embodiments of the proposed technology makes it possible to perform maintenance work such as welding in the wet environment present in water carrying pipes. Other advantages will be appreciated when reading the detailed description.
• FIG. 1 a is a schematic diagram of a device according to the proposed technology.
• FIG. 1 b is a schematic diagram of a device according to the proposed technology connected to an external supply of pressurized gas or air.
• FIG. 2 is a schematic diagram of an embodiment of a device according to the proposed technology.
• FIG. 3 is a schematic diagram of an alternative embodiment of a device according to the proposed technology.
• FIG. 4 is a schematic diagram of another alternative embodiment of a device according to the proposed technology.
• FIG. 5 is a schematic diagram of still another alternative embodiment of a device according to the proposed technology.
• FIG. 6 is a schematic diagram of yet another alternative embodiment of a device according to the proposed technology.
• FIG. 7 is a schematic diagram of an exemplary embodiment of a device according to the proposed technology.
• FIG. 8 is a schematic diagram of another exemplary embodiment of a device according to the proposed technology.
• FIG. 11 is a schematic diagram illustrating yet another alternative embodiment of the device depicted in FIG. 9.
• FIG. 12 is a schematic diagram of an embodiment of the device according to the proposed technology when in place for use in a water carrying pipe.
• FIG. 1 a is a schematic illustration of a device that is adapted for removing vapor from a section of a water pipe to enable welding in the section.
• FIG. 1 a illustrates a device 10 that is adapted to be inserted into the water pipe.
• the device comprising a first component 1 comprising at least one gas transferring channel 13a adapted to be connected to an external pressurized gas supply.
• the device also comprises a second component 2 adapted to be inserted into the water pipe.
• the second component 2 having an elongated shape and being connected to the first component 1 at a first end 2a and comprising an gas outlet part 21 adapted to face the direction of incoming vapor, the second component 2 further comprising at least one gas transferring channel 23 adapted to convey gas from the external pressurized gas supply to the gas outlet part 21 through the channel 13 comprised in the first component 1 to enable pressurized gas to exit the second component 2 through the gas outlet part 21 in a direction toward the vapor to thereby steer the vapor away from a region of the pipe where welding are to be performed.
• the proposed technology provides a device that will enable the user to remove vapor from relevant areas in the water pipe in order to perform maintenance work such as welding.
• the vapor is removed from the relevant area by blowing highly pressurized gas toward it.
• the pressurised gas which preferably is a highly pressurized gas, will scatter the vapor and thus prohibit it from reaching particular areas.
• the gas may be air, e.g., compressed air, but it may also be some other gas such as a cooling gas.
• By introducing cooling gas into the pipe the temperature gets lower and at least part of the vapor is allowed to condensate and fall toward the bottom of the water pipe, thereby creating a dryer environment in the upper part of the pipe.
• the condensed water, flowing on the bottom part may additionally be removed by utilizing a particular embodiment of the proposed technology to be described later in this disclosure.
• FIG. 1 b illustrates how the device 10 is connected to an external pressurized gas or air supply 100 through a gas or air conduit 101.
• FIG. 2 is a schematic illustration of an embodiment of the proposed technology that displays a device 10, wherein the elongated second component 2 is curved such that a section 210, comprising the gas outlet part 21 , of the elongated second component 2 is offset relative the remaining parts of the second component 2.
• the purpose of the curved section is to provide more space behind the section 210 in order to simplify the work for the welder/repair man.
• the welder may enter the pipe through the same open joint in the water carrying pipe that were used for inserting the device and since the device comprises a curved section it is created more space in the area around the pipe joint. This area will provide the welder/repair man with some manoeuvring space.
• This particular embodiment enables an elongated third component that can be connected to the second component but can also be long enough so that at least part of the third component is arranged on the outside of the pipe if the device was inserted into the pipe with the third component as the leading edge. That is, if the device has a length dimension that is larger than the diameter of the pipe.
• a first purpose is to provide a locking means on the third part.
• the proposed technology provides a device 10, wherein the third component 3 comprises a locking means 31 that is adapted to enable locking the device 3 to the water pipe.
• FIG. 4 A particular example of such an embodiment is schematically illustrated in FIG. 4. Since the second component 2 of the device comprises an outlet part 21 for blowing pressurized gas towards the vapor it is possible that the second component, in case the gas flow through the component is substantial, will be subject to forces that may cause a movement to the second component 2. This movement may in turn enable vapor to enter the area of the pipe where welding are to be performed and disturb the welding operation.
• a device 10 wherein the locking means 31 are arranged on the non-curved part of the third component 3.
• This embodiment provides more space for the operator, in the area behind the curved section, as well as a possibility to e.g. , stabilize the device during use, i.e. , locking the device to the pipe.
• Certain embodiments of the proposed technology provide a device that has a length dimension that is larger than the diameter of the water pipe whereby the locking means can be arranged on the outside of the water pipe.
• Still another embodiment of the proposed technology provides a device 10 wherein the third component further comprises at least one gas transferring channel 13b adapted to be connected to an external pressurized gas supply, not shown, over an gas conduit 101 and adapted to convey pressurized gas from the external pressurized gas supply to the gas outlet part 21.
• This embodiment enables gas to be transferred to the gas outlet part 21 from two directions, a first direction through the first component 1 and a second direction through the third component 3.
• the outlet part 21 may for example direct gas conveyed through the first component in a first direction in the pipe and direct gas conveyed through the third component in a second direction, e.g., the opposite direction.
• the device also comprises a the third component 3 that further comprises a water transferring channel 34 having one end 34a connected to the water transferring channel 24 in the second component 2 and having an opposite end 34b that is open to enable the external water pumping device to remove water present in the water pipe through the connected water transferring channels 14; 24; 34, where the part of the third component that comprises the opposite end 34b have a shape that is adapted to the inner profile of the water pipe.
• This embodiment that combines vapor removing mechanisms and water removing mechanisms is illustrated in FIG. 6.
• the operator may insert, through open pipe joints, the device into the pipe from a first direction whereby the device spans the pipe in a horizontal direction in order to let the gas outlet part 21 face any vapor present in the pipe.
• the second component comprises a centrally arranged water transferring channel 24. This may leave sparse room to arrange the gas transferring channels and one might have to arrange them closer to the boundaries of the second component 2. In such cases the gas exit holes may also be arranged closer to the boundaries or edges of the second component 2.
• FIG. 8 provides an illustration of the second component of the device where the arrows indicate the flow through the gas transferring channel 23 and how the gas exits the component through holes 22 arranged along the edge of the second component. A single row of holes is illustrated, it is however possible to arranged several rows of holes, the competition of space between the gas transferring channel and the water transferring channel determines how many exit holes that can be used.
• the gas outlet part 21 comprises a plurality of holes 22 arranged on the surface of an inflatable structure having an inside connected to the gas transferring channel 23.
• an inflatable structure e.g., a balloon like structure
• the inflatable structure may, by way of example, have the form of an inflatable bellow.
• the bellow may be configured to have a first configuration in its uninflated state where all of its part are arranged close to the second component.
• the bellow may also be configured to have a second configuration when inflated, in which configuration the distance between the bellows utmost part and the second component is increased.
• the inflatable structure may be inflated by means of a designated air or gas channel connected to an external air or gas supply.
• an inflatable structure that comprises two spaced apart layers, an inner layer and an outer layer, of foldable material, i.e. , a soft plastic or a textile.
• the inner layer is closed and may be connected to an external air or gas supply through a dedicated set of air or gas channels. By allowing air or gas to flow into the inner layer the inner layer will inflate and the outer layer, surrounding the inner layer, will follow suit.
• the outer layer comprises gas exit holes and are also connected to an external air or gas supply through a dedicated set of air or gas channels. The holes in the second layer are intended to open up in a direction towards the vapor.
• the gas or air channels that connects the air or gas supply to the inside of the first layer may be equipped with a valve to enable the operator of the device to control the amount of inflation of the inner layer.
• the gas or air supply that inflates the inner layer may in a particular example be connected to the inner layer through air or gas transferring layers provided in the third component 3 of the device 10.
• the control mechanism may, according to a first example, be a controllable mechanical locking mechanism that locks the extendable elements 220 in its first configuration and that forces the extendable structure to assume the second configuration when the locking mechanism is unlocked. This may for example be done by means of a biased spring attached to the extendable means.
• the natural configuration of the spring has a length that corresponds to the height of the extendable structure when it assumes its extended configuration. By clamping or locking the spring in a compressed state it is possible to force the extendable structure to assume its non-extended configuration, the extended configuration may then be obtained by unlocking or unclamping the spring.
• the unlocking mechanism may for example comprise a rod connected to the clamping mechanism that can twist the locking mechanism in order to unlock the spring.
• the rod should preferably have an extension such that it can be manipulated from the outside of the pipe when the device is in use.
• the proposed technology also provides a device wherein the second component 2 further comprises at least one protruding structure 25 having a peripheral edge with the same shape as the inner profile of the water pipe to enable the protruding structure to tightly connect to the inside of the pipe.
• the protruding structure being either directly arranged on the second component 2 or being arranged on the extendable elements 220.
• FIG. 9 provides a schematic illustration of such an embodiment. The embodiment ensures that any vapor that has not been steered away by the blowing gas is not allowed to pass the protruding structure. This will in turn ensure that a dry environment is created in the area behind the protruding structure.
• FIG. 10 is a schematic illustration of a device 10 wherein a protruding structure 25 provided with holes 22 protrudes in two different directions from the second component 2.
• a gas conduit 1010 connects the first component 1 of the device to an external gas supply, not shown.
• Still another embodiment of the proposed technology provides a device 10 wherein the at least one protruding structure 25 is hingedly attached to said second component 2 to enable the protruding structure 25 to assume an angled configuration, relative the longest direction of the elongated second component when the device is in an operational state.
• the protruding structures 25a and 25b may be attached to the second component 2 or the extendable elements 220 through a hinge or hinging means such that the protruding structures 25a and 25b have their natural position, i.e. , the position the protruding structures 25a and 25b assume when no other external forces beside gravity and the force from the hinges are applied, in its angled configuration.
• the protruding structures 25a and 25b may be provided with interlocking means that lock them together in their upright configuration when they are inserted into the water pipe through pipe joints in the same. The interlocking means may then be removed to allow the protruding structures to assume their natural position when in place in the water pipe.
• the interlocking means may for example be a removable clip that locks the protruding structures 25a and 25b together.
• the protruding structures 25a and 25b are provided with gas exit holes 22, at least along their peripheral edges, that are connected to the external gas supply through gas transferring channels. These gas exit holes will ensure that vapor is steered away from the compartment created between the protruding structures 25a and 25b.
• the device shown in FIG. 11 may also be adapted to remove water from the bottom of a water carrying pipe.
• the peripheral edges of the protruding structures 25a and/or 25b with a hole, or several holes, to enable water to be pumped from the bottom of the water carrying pipe.
• These holes are connected to an end of water transferring channel provided in the protruding structure, this water transferring channel may have its other end connected to a corresponding water transferring channel provided in the second component, optionally through a water transferring channels in the extendable element 220, if such an element 220 is used.
• the water transferring channel in the second component 2 can be connected to an external water pumping device, through corresponding water channels in the first component.
• the protruding structure 25 comprises at least one gas transferring channel connected to the gas transferring channel 23 of the second component 2 and a plurality of holes 22 arranged on the surface of the protruding structure 25 that connects the gas transferring channel with the environment.
• the protruding structure 25 may be provided with holes on both sides to enable a gas exit on both sides of the device in order to create a dry environment surrounding the device.
• the gas or air supplied to the opposite sided of the protruding structure 25 may emanate from different external air or gas supplies. It is for example possible to feed gas to one side of the protruding structure 25 from an external gas supply connected to the first component 1 of the device and to the other side of the protruding structure 25 from an external gas supply connected to the third component 3 of the device.
• a gas conduit i.e. , a conduit of hose type, that connects the gas transferring channel in the protruding structures with the gas transferring channel 23 in the second component 2, either directly to the same or through an intermediate gas transferring channel provided in the extendable element 220, if the protruding structure is attached to the extendable element 220.
• the gas conduit should therefore have one end that communicates with the external gas supply and an opposite end that opens up in the protruding structures 25 to enable gas to leave the protruding structures 25 through gas exit holes in the same.
• the proposed technology provides a device according to what has been described earlier, wherein at least parts of the first component 1 is curved so that it extends in a direction essentially orthogonal to the second component 2.
• the curved first component may act as a handle that will simplify the control of the device e.g., make it easier to change the direction in which the device is inserted into the water pipe.
• a possible embodiment of the proposed technology provides a device wherein the gas transferring channel 13a in the first component 1 is connected to the external pressurized gas supply through a valve to enable the controlling of the gas supply to the second component 2, the valve being adapted to lie outside of the water pipe when the device 10 is in its operational state.
• an gas transferring channel 13b in the third component 3 is connected to the external pressurized gas supply through a valve to enable the controlling of the gas supply to the second component 2, the valve being adapted to lie outside of the water pipe when the device 10 is in its operational state.
• all three components 1 ; 2; 3 of the device are integrally formed.
• Some of the optional components, such as the inflatable structure, the extendable elements and the protruding structure may also be integrally formed in the device, but they may also be removably provided on the device 10.
• the present disclosure also provides a first embodiment of a device that is configured to create a dry environment in parts of a water pipe to enable welding in the parts.
• the device having a width dimension that allows it to be inserted into opened joints of the water pipe.
• the device comprises a handle part for steering the device into the opened pipe joint.
• the device also comprises an elongated insertion part connected to the handle part at one end, the elongated part having a length that allows it to essentially span the diameter of the water pipe.
• the device also comprises at least one protruding structure arranged on the elongated insertion part, the protruding structure having a peripheral edge having the same shape as the inner profile of the water pipe to enable the protruding structure to tightly connect to the inside of the pipe, the at least one protruding structure being hingedly attached to the elongated insertion part to enable the protruding structure to assume an angled configuration, relative the longest direction of the elongated second component when the device is in an operational state. That is, when it is inserted into the pipe.
• a third embodiment of the proposed device provides a device according to any of the first or second embodiments wherein the at least one protruding structure comprises an extendable part having a first end that is hingedly attached to the elongated insertion part, and a second opposite end having the same shape as the inner profile of the water pipe, and wherein the extendable part is adapted to be extended in a direction that raises or elevates the second opposite end from the elongated insertion part.
• a fourth embodiment of the proposed device provides a device according to any of the embodiments 1 -3, wherein the first and second protruding structures may be attached to either the second component or the extendable part through a hinge or hinging means such that the first and second protruding structures have their natural position, i.e.
• a fifth embodiment of the proposed device provides a device according to any of the embodiments 1 -4, wherein the extendable part is adapted to assume at least two configurations, a first non-extended configuration when the device is in an idle state and a second extended configuration when the device is in an operational state, i.e. , when inserted into the water pipe through an open joint.
• FIG. 13 is a schematic flow diagram illustrating a method for removing vapor from parts of water pipe by utilizing a device according to what has been described herein.
• the method comprises inserting S1 , through an open pipe joint in the water pipe located in the vicinity of the part of the water pipe where welding is to be performed, the second component 2 in such a way that the gas outlet part 21 is facing in the direction of the vapor.
• the method also comprises connecting S2 the first component of the device to an external pressurized gas supply.
• the method also comprises allowing S3 gas from the external pressurized gas supply to flow through channels in the first 1 and second component 2 and exit the device 10 through the gas outlet part 21 in a direction facing the vapor to thereby steer the incoming vapor away from the part of the water pipe where welding is to be performed.
• the proposed technology also provides a method for performing welding in parts of a water carrying pipe.
• the method comprises identifying S10 the part of the water carrying pipe where welding are to be performed.
• the method also comprises opening S20 a water pipe joint in vicinity of the identified part.
• the method also comprises removing S30 vapor from the water pipe by means of a method according to claim 22.
• the method also comprises performing S40 welding on the identified part of the pipe.
• the method is schematically illustrated in the flow diagram of FIG.14.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Plasma & Fusion (AREA)
• Optics & Photonics (AREA)
• General Engineering & Computer Science (AREA)
• Pipeline Systems (AREA)
• Arc Welding In General (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=71101532

Family Applications (1)

Country Status (3)

Family Cites Families (8)

• 2018
  • 2018-12-21 SE SE1851665A patent/SE543612C2/en unknown
• 2019
  • 2019-12-17 WO PCT/SE2019/051290 patent/WO2020130915A1/en not_active Ceased
  • 2019-12-17 EP EP19900381.5A patent/EP3899342A4/de active Pending

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