Abstract: Device (11) for driving a flexible lance (4) for cleaning a heat exchanger duct, provided with a frame (1) in which a drive (12) driving a flexible lance (4) is arranged for moving this flexible lance (4) in the direction of an outlet opening. The drive (12) is provided with a member (27) which can be clamped round the flexible lance (4) and which is movable in the frame (1) towards and away from this outlet opening.

Abstract: A device for spreading two flanges (1, 2) mounted in opposite position in a pipe system (3), which device mainly comprises a conical screw element (7) to be inserted into a continuous hole of a flange, said element having an axial opening, in which fits a pressure member (6) having a pressure head face for the axial displacement of the pressure member in said opening, wherein the screw element (7) has a screwthread with at least three leads in order to adapt said device for a greater variety of hole diameters in the flanges (1, 2) and to guarantee the necessary guiding of the conical screw element (7) during insertion thereof.