Abstract: A mobile flanging machine for pipes has a portable frame on which a drive is mounted, which drives a roller via a transmission, and an adjustment mechanism fixed to the frame, on which a counter-pressure roller is movably held, wherein a bent flange can be produced on the pipe end by inserting a pipe end into a gap between the roller and the counterpressure roller. A method for assembling the mobile flanging machine involves transporting and setting up a frame with a rotatably mounted roller and an adjustment mechanism on which a counterpressure roller is movably held, transporting a drive with a first coupling part to the frame, connecting the first coupling part to a second coupling part for driving the roller, and fixing the drive to the frame.

Abstract: A tension ring, particularly for connecting two tube ends, includes several mutually linked segments. A closing device detachably connects two segments with one another. The position of the segments relative to one another is adjustable at least on one hinge element between two segments. As a result of the closing device preferably constructed as a quick-acting closure, a prefixing/pretensioning can be achieved and, subsequently, the tension of the tension ring can be regulated to the desired extent by an adjusting device without opening the closing device again.

Abstract: A tension ring, particularly for connecting two tube ends, includes several mutually linked segments. A closing device detachably connects two segments with one another. The position of the segments relative to one another is adjustable at least on one hinge element between two segments. As a result of the closing device preferably constructed as a quick-acting closure, a prefixing/pretensioning can be achieved and, subsequently, the tension of the tension ring can be regulated to the desired extent by an adjusting device without opening the closing device again.