The present application relates to a field system and methods that can be deployed in the application of pipe welding. The field system provides many embodiments relating to pipe welding systems and methods, that can be used in combination with one another, or individually. Such welding systems and methods, include, for example, internal welding systems and methods, tie-in welding system and methods, pipe inspection systems and methods, pipe handling systems and methods, internal pipe cooling systems and methods, non-destructive testing systems and methods, as well as remote interface and database systems and methods (uLog), to name a few. The application further relates to welded pipes that result from some or all of such processes.

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.

A metal hand tool including a handle attached to a blade piece and method of construction. The blade piece includes a blade opposite an elongated tang. The handle is made up of two, welded, symmetrical handle halves, each handle half having an opening for receiving a hang hole piece and a notched distal end for forming a handle opening to receive the blade piece elongated tang. In an embodiment, the handle includes a curved distal end accommodating a curved welded connection between the blade piece and the handle. The hand tool further includes a hang hole piece configured for placement through the hang hole openings in the handle and for welded connection to the handle. In an embodiment, the elongated tang includes a hang hole opening through which the hang hole extends. Some embodiments further include one or more tang guide pieces welded to the interior of the handle.

A metal hand tool including a handle attached to a blade piece and method of construction. The blade piece includes a blade opposite an elongated tang. The handle is made up of two, welded, symmetrical handle halves, each handle half having an opening for receiving a hang hole piece and a notched distal end for forming a handle opening to receive the blade piece elongated tang. In an embodiment, the handle includes a curved distal end accommodating a curved welded connection between the blade piece and the handle. The hand tool further includes a hang hole piece configured for placement through the hang hole openings in the handle and for welded connection to the handle. In an embodiment, the elongated tang includes a hang hole opening through which the hang hole extends. Some embodiments further include one or more tang guide pieces welded to the interior of the handle.

A hygienic food product to food product heat exchanger (1). The heat exchanger (1) has an elongated and hollow housing (4), a metal tube plate (6) arranged at each of the opposite ends of the elongated housing (4) for defining a closed interior space (10) inside the elongated and hollow housing (4), a plurality of tightly spaced metal tubes (2) axially extending between the tube plates (2) with the ends of the tubes being received in correspondingly tightly spaced holes the tube plates (6) or with the lumen of the tubes being aligned with said correspondingly tightly spaced holes in the tube plates. The metal tubes (2) are sealingly secured to the metal tube plates (6) by a welding joint (20) on the inwardly facing side of the tube plates (6).

A pipe assembly station for performing operations on a field joint during pipe assembly has an active rail extending around an opening through which the pipe can pass. Tool carriages are arranged to traverse along the active rail and around a periphery of the pipe. The station also comprises a standby position, distanced from the active rail and a switch arranged to transfer the tool carriage from the active rail to the standby position. By providing such a combination of a rail and a standby position, a tool carriage can be brought into position on the active rail to perform a pipe joining operation and can be subsequently set back to the standby position, where it is out of the way of operations taking place on the pipe. Such a switching arrangement allows for more effective use of the limited space around the joint.

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.

Disclosed is a system having a robotic welding system, a controller, a camera, and a processor. The robotic welding system is configured to weld metal sections together in accordance with a plurality of welding variables. The controller is configured to automatically control the robotic welding system. The camera captures sequential images of the welding performed by the robotic welding system. According to an embodiment, the processor is configured to process the sequential images to determine when a selected welding state is to change to a next welding state based on the selected welding state and multiple consistent determinations of the next welding state, and to signal that change to the controller to effect a change in how the welding is performed by the robotic welding system. By considering multiple consistent determinations of the next welding state, there can be a high probability that the next welding state is correct.

A system and method provide gasless, mechanized, field welding of an exterior of a tubular structure such as a pipeline, without the need for an enclosure. An embodiment consolidates some of the welding equipment on a skid for ease of transport to and from a remote worksite. The gasless weld may be achieved despite the presence of wind, by precisely controlling an arc voltage as disclosed. The footprint and weight of the system may be minimized, along with the associated labor, expense, and environmental impact otherwise incurred by conventional welding techniques using enclosures.

A submerged arc welded joint in a high-Mn content steel material that can be formed with reduced occurrence of hot cracking during the welding process and has high strength and excellent cryogenic impact toughness. In the welded joint, the high-Mn content steel material has a chemical composition including, by mass %, C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 18.0 to 30.0%, P: 0.030% or less, S: 0.0070% or less, Al: 0.010 to 0.070%, Cr: 2.5 to 7.0%, N: 0.0050 to 0.0500%, and O: 0.0050% or less, the balance being Fe and incidental impurities, and a weld metal has a chemical composition including C: 0.10 to 0.80%, Si: 0.05 to 1.00%, Mn: 15.0 to 30.0%, P: 0.030% or less, S: 0.030% or less, Al: 0.100% or less, Cr: 6.0 to 14.0%, and N: 0.100% or less, the balance being Fe and incidental impurities.