Embodiments are directed to methods, systems, and apparatuses, for providing fittings capable of being orbitally welded. A system may include measuring components configured to measure a tubing thickness and measure a fitting thickness. The system may also include a processor configured to determine a difference in thickness between the measured tubing thickness and the measured fitting thickness and, based on the determined difference in thickness, determine an amount of fitting that is to be removed to reach a set, specified thickness that allows the fitting to be orbitally welded. The system may also include a facing tool configured to bevel and shape an end portion of the fitting according to the determined amount of fitting that is to be removed to reach the specified thickness and may include an orbital welder configured to orbitally weld the beveled end of the fitting to the tubing in a fusion socket weld.

Systems and methods for providing a constant current controller for use in constant current welding applications are described. In one embodiment, a current controller controls the output current of the welding torch without directly measuring the output current of the welding torch. The current controller controls or sets a current in a primary winding of a transformer in an inverter of a welding power supply to control the output current of the welding torch.

Systems and methods for providing a constant current controller for use in constant current welding applications are described. In one embodiment, a current controller controls the output current of the welding torch without directly measuring the output current of the welding torch. The current controller controls or sets a current in a primary winding of a transformer in an inverter of a welding power supply to control the output current of the welding torch.

An example welding torch includes: a handle piece that is electrically and mechanically connected to the torch head on a first end of the handle piece; a power supply connector configured to be coupled to a welding power supply on a first end of the power supply connector, wherein at least one of the handle piece or the power supply connector are a single piece; a welding cable that is electrically and mechanically connected to both a second end of the handle and a second end of the power supply connector; a first cover over the torch head, the handle piece, and a first portion of the welding cable connected to the handle piece; and a second cover over the power supply connector and a second portion of the welding cable connected to the power supply connector.

An example welding torch includes: a handle piece that is electrically and mechanically connected to the torch head on a first end of the handle piece; a power supply connector configured to be coupled to a welding power supply on a first end of the power supply connector, wherein at least one of the handle piece or the power supply connector are a single piece; a welding cable that is electrically and mechanically connected to both a second end of the handle and a second end of the power supply connector; a first cover over the torch head, the handle piece, and a first portion of the welding cable connected to the handle piece; and a second cover over the power supply connector and a second portion of the welding cable connected to the power supply connector.

A weld structure includes a first stainless steel member and a second stainless steel member. A crevice made by welding is defined by welding an end of the first stainless steel member and a portion other than an end of the second stainless steel member. A portion close to the end of the first stainless steel member is formed as a weld metal portion by performing welding heat input on the portion close to the end of the first stainless steel member. In the crevice made by welding, a length L.sub.B from a boundary between the weld metal portion and a raw material portion to a crevice deepest portion and a crevice length L.sub.C from the crevice deepest portion to a 40 μm-width position satisfy L.sub.C<L.sub.B.

An example weld training system includes: a weld training device configured to perform a simulated welding procedure on a simulated weld joint; a work surface comprising the simulated weld joint; a sensing device configured to track weld training device location information during the simulated welding procedure; a visual interface configured to display results of the simulated welding procedure based on the weld training device location information; and an enclosure comprising an interior volume configured to house within its interior the visual interface, the work surface, and the sensing device.

An example weld training system includes: a weld training device configured to perform a simulated welding procedure on a simulated weld joint; a work surface comprising the simulated weld joint; a sensing device configured to track weld training device location information during the simulated welding procedure; a visual interface configured to display results of the simulated welding procedure based on the weld training device location information; and an enclosure comprising an interior volume configured to house within its interior the visual interface, the work surface, and the sensing device.

Clamping device (2) for clamping a non-consumable welding electrode (3) with an electrode holder (2A) which has a receiving chamber (2B) aligned in the longitudinal direction for receiving a welding electrode (3) which is insertable therein and at its front end has an end portion (2C) which widens conically towards the forward end and can be compressed by means of a clamping heat sink (2D) for holding the welding electrode (3), thus producing a large-surface cooling end face (KSF) for cooling the welding electrode (3).

Clamping device (2) for clamping a non-consumable welding electrode (3) with an electrode holder (2A) which has a receiving chamber (2B) aligned in the longitudinal direction for receiving a welding electrode (3) which is insertable therein and at its front end has an end portion (2C) which widens conically towards the forward end and can be compressed by means of a clamping heat sink (2D) for holding the welding electrode (3), thus producing a large-surface cooling end face (KSF) for cooling the welding electrode (3).