Device and system for opening up branch point of pipe assembly

A device for opening up a branch point in a pipe assembly, comprising:

• a rotation axle arranged to be rotatable and a tip part arranged to be rotatable and in connection of which there is at least one blade, as well as a centralizing system separate from the tip part and arranged to be substantially non-rotating when the tip part is rotated, and the centralizing system comprising at least two discs through which the rotation axle is arranged to pass, and a spring that keeps the discs apart and positions the discs as planes perpendicular to the rotation axle;
• each of the discs having numerous protrusions radially protruding from the outer edge of the discs, the protrusions being more elastic than the discs and made out of plastic;
• the blade being attached to the tip part and extending in a forward and longitudinal direction from the tip part;
• and
• each protrusion of the discs being movable between a first position wherein the protrusion is perpendicular relative to the rotation axle and a second bent position without bending said discs.