An orbital welding device (1) having a welding head (2), the welding head having a tubular mount (3) and a welding electrode holder (4) rotatably supported with respect to the tubular mount (3), the orbital welding device (1) having an electric motor (6) activated by a motor controller (5) of the orbital welding device (1), which is configured to drive the welding electrode holder (4) and thus to rotate the same with respect to the tubular mount (3), wherein the orbital welding device (1) has an electric torque measuring device (7), which is configured to measure a torque applied by the motor (6) to the welding electrode holder (4), wherein the torque measuring device (7) is connected to the motor controller (5), and wherein the motor controller (5) is configured to stop the motor (6) automatically if the torque exceeds a predetermined first torque.

The invention relates to an orbital welding device with a welding head that has a receptacle for positioning a joining area of two joining partners, in particular a fitting and a pipe end, in which joining partners are tubular at least in the joining area. The welding head has a first opening and a second opening opposite the first opening, between which the receptacle extends, and wherein the welding head is adjustable between an open position and a closed position. The welding head, in the open position, has an insertion opening connecting the first and second openings for inserting a joining area of two joining partners, which are tubular at least in the joining area, into the receptacle, and wherein the insertion opening is at least partially closed in the closed position. The invention further relates to a system with such an orbital welding device and an orbital welding method.

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.

An orbital welding system is disclosed for joining a riser to a pulled collar on a manifold runner with a circumferential weld bead, which includes a multi-axis welding platform, a weld head assembly supported on the welding platform and including a shaft housing, an electrode drive shaft mounted for axial rotation within the shaft housing, a drive motor connected to the electrode drive shaft for axially rotating the electrode drive shaft, and a torch assembly that rotates with the electrode drive shaft and includes a vertical torch shaft having an electrode holder at an upper end thereof for retaining a tungsten electrode.