Apparatus for forming glass tubes, a heating chamber and a process for the manufacture of an apparatus for forming glass tubes

An apparatus for forming glass tubes, comprising:

• a Danner-pipe;
• a heating device;
• and
• a heating chamber having the Danner-pipe and the heating device arranged therein,
• wherein the Danner-pipe is inclined with respect to a horizontal plane by a Danner-angle, wherein the heating device is inclined with respect to the horizontal plane by a heating-angle, wherein the heating device comprises at least two heating elements which are arranged in a row, wherein the heating elements are gas burners, and wherein the gas burners are adjacent to the Danner-pipe.