A device for welding together cylindrical sections of a casing. The device comprises a clamping ring configured to surround and attach to a section of the casing and a robot provided with a welding gun and at least one joint, wherein the robot is movably attached to the clamping ring by cooperating means. A method for welding cylindrical sections of a casing by using such a device includes the steps of a) positioning and clamping the clamping ring at the correct position, b) moving the robot along the clamping ring to the correct position for welding, c) welding the sections to each other by the welding gun of the robot, and d) releasing the clamping ring.

The invention is an apparatus and method for Orbital welding of pipes or pipe segments together to form a pipeline, i.e., Orbital welding. A scanner welding unit, a control unit and a welding unit are combined to travel along and above a seam, which is formed between two interfacing base/cylindrical surfaces of every two pipe or pipe segments, scan the pipes/pipe segments relative positioning, alignment and levelling, and their surface geometry and topography and overlay a welding material starting from the root layer at the bottom of the seam and up to its edge and sealing it with a capping layer. The welding unit lowers a welding tip into the seam that may rotate on its axis at different angels relative to the surface during welding. The scanner unit may alert on mismatches on the relative position of the pipes/pipe segments before or after welding and in some cases enable repositioning for a more hermetically sealed weld.

A welding method includes: forming one or more lower plate grooves having a predetermined width and a predetermined depth at one side of an upper surface of a lower plate; forming one or more upper plate grooves having a predetermined width and a predetermined depth at one side of a lower surface of an upper plate; overlapping the lower plate and the upper plate so that the lower plate grooves of the lower plate and the upper plate grooves of the upper plate mesh with one another; and performing welding to form a bead at a welding part.

A welding method includes: forming one or more lower plate grooves having a predetermined width and a predetermined depth at one side of an upper surface of a lower plate; forming one or more upper plate grooves having a predetermined width and a predetermined depth at one side of a lower surface of an upper plate; overlapping the lower plate and the upper plate so that the lower plate grooves of the lower plate and the upper plate grooves of the upper plate mesh with one another; and performing welding to form a bead at a welding part.

An orbital welding device (1) for welding two pieces of pipe, the orbital welding device (1) having a welding current source (10) in a welding current source housing (11) and an orbital welding head (20), which is separate from the welding current source housing (11) and is connected to the welding current source (10) by a cable (2), the orbital welding head (20) having a chamber (50) for the use of shielding gas (50) and/or the orbital welding device (1) having a purging device (90) for the use of shielding gas, preferably back-up shielding gas or purge gas, the orbital welding device (1) having an oxygen sensor (40), wherein the oxygen sensor (40) is arranged in or on the welding current source housing (11).

An orbital welding device (1), having a welding current source (10) in a welding current source housing (11) and an orbital welding head (20), which is separate from the welding current source housing (11) and is connected to the welding current source (10) by a cable (2), the orbital welding head (20) having a pipe mount (21) and a welding electrode holder (22) for holding a welding electrode (23). An electric motor (31) is designed to drive the welding electrode holder (22) and thus turn it with respect to the pipe mount (21). The orbital welding head (20) has a chamber (50) for shielding gas. An optical oxygen sensor (40) is designed to measure an oxygen concentration in a measuring region (51) in the chamber (50). The oxygen sensor (40) is arranged outside the chamber (50) and is optically coupled to the measuring region (51) by an optical coupling.

A design for tank fabricating equipment and system comprises a frame supporting opposing arms for supporting one or more tank shells. The opposing arms pivotally engage opposing sides of the tank shells to force them into a circular cross-sectional shape. The arms are provided with rollers for aligning the tank shell with adjacent components during fabrication. In some embodiments, the rollers are provided with a circumferential channel to accommodate welding seams and to ensure alignment of butt joints.

Methods for welding a particle-matrix composite body to another body and repairing particle-matrix composite bodies are disclosed. Additionally, earth-boring tools having a joint that includes an overlapping root portion and a weld groove having a face portion with a first bevel portion and a second bevel portion are disclosed. In some embodiments, a particle-matrix bit body of an earth-boring tool may be repaired by removing a damaged portion, heating the particle-matrix composite bit body, and forming a built-up metallic structure thereon. In other embodiments, a particle-matrix composite body may be welded to a metallic body by forming a joint, heating the particle-matrix composite body, melting a metallic filler material forming a weld bead and cooling the welded particle-matrix composite body, metallic filler material and metallic body at a controlled rate.

Systems and methods for the remote control of automated equipment are disclosed herein. The systems and methods include automated equipment configured to execute a process in a restricted location by performing operations based on predetermined programming. In some embodiments, the process is a welding process and the restricted location is a nuclear containment building. The system and methods also include cellular routers configured to enable communication of operating parameters between the automated equipment and a human machine interface (HMI). An operator is able to remotely modify operations of the automated equipment, without being inside of or at the site of the restricted location, by changing the operating parameters using the HMI.

A tube assembly includes at least first and second tubes configured for coupling at respective ends. The first and second tubes each include a base material, and a weld interface at the respective end. The weld interface is proximate to an inner diameter and an outer diameter of the first and second tubes, and includes a weld interface segment extending therebetween. A work hardened weld assembly couples the base material of each of the first and second tubes. The work hardened weld assembly includes a weld fusion zone between the weld interfaces of the first and second tubes and the weld interface segments of the first and second tubes. The weld fusion zone is work hardened and at least the weld interface segments of the first and second tubes are work hardened between the work hardened weld fusion zone and the base material of the first and second tubes.