A packaging apparatus for forming a plurality of sealed packages filled with a pourable product comprising: - conveying means for advancing a web of packaging material along an advancement path; - an isolation chamber separating an inner environment from an outer environment; - a tube forming device extending along a longitudinal axis, being at least partially arranged within the isolation chamber and being adapted to form a tube from the, in use, advancing web of packaging material, wherein the conveying means are also adapted to advance the tube formed by the tube forming device along a respective tube advancement path; - a sealing device at least partially arranged within the isolation chamber and being adapted to longitudinally seal the tube formed by the tube forming device; - a support structure carrying at least the tube forming device; - filling means for continuously filling the tube formed by the tube forming device with a pourable product; - a package forming unit adapted to form and seal the packages from the, in use, advancing tube formed by the tube forming device and filled by the filling means; wherein the packaging apparatus further comprises a base support structure housing the package forming unit and carrying the isolation chamber; characterized by the support structure comprising at least one support column being carried by the base support structure and extending perpendicular away from the base support structure and being arranged within the isolation chamber; wherein the support column carries at least indirectly the tube forming device and extends parallel to the longitudinal axis of the tube forming device. - conveying means for advancing a web of packaging material along an advancement path; - an isolation chamber separating an inner environment from an outer environment; - a tube forming device extending along a longitudinal axis, being at least partially arranged within the isolation chamber and being adapted to form a tube from the, in use, advancing web of packaging material, wherein the conveying means are also adapted to advance the tube formed by the tube forming device along a respective tube advancement path; - a sealing device at least partially arranged within the isolation chamber and being adapted to longitudinally seal the tube formed by the tube forming device; - a support structure carrying at least the tube forming device; - filling means for continuously filling the tube formed by the tube forming device with a pourable product; - a package forming unit adapted to form and seal the packages from the, in use, advancing tube formed by the tube forming device and filled by the filling means; wherein the packaging apparatus further comprises a base support structure housing the package forming unit and carrying the isolation chamber; characterized by the support structure comprising at least one support column being carried by the base support structure and extending perpendicular away from the base support structure and being arranged within the isolation chamber; wherein the support column carries at least indirectly the tube forming device and extends parallel to the longitudinal axis of the tube forming device.