An apparatus for forming glass tubes is provided. The apparatus includes a Danner-pipe, a heating device, and a heating chamber having the Danner-pipe and the heating device arranged therein. The Danner-pipe is inclined with respect to a horizontal plane by a Danner-angle. The heating device is inclined with respect to the horizontal plane by a heating-angle. The Danner-angle and/or the heating angle are in a range of 1 to 45.

An apparatus for forming glass tubes is provided. The apparatus includes a Danner-pipe, a heating device, and a heating chamber having the Danner-pipe and the heating device arranged therein. The Danner-pipe is inclined with respect to a horizontal plane by a Danner-angle. The heating device is inclined with respect to the horizontal plane by a heating-angle. The Danner-angle and/or the heating angle are in a range of 1 to 45.

An insulation product includes mineral fibers and a binder obtained by curing a binding compound, includes as components a) compounds including at least one epoxy function, including at least one epoxy precursor chosen from aliphatic compounds including at least two epoxy functions, b) a hardener chosen from compounds including at least two reactive functions chosen from hydroxyl and carboxylic acid functions, it being possible for the carboxylic acid function(s) to be in salt or anhydride form.