The industrial research of the process of annealing of hot-rolled pipes of steel ШХ15 in a chamber furnace was carried out. The reasons of the unqualitative heating and cooling of pipes in a batch were found out. The present schedule of annealing didn’t correspond to the requirements of temperature regime. The corrected schedule of heat treatment for removing the present faults and the variant of reconstruction of chamber furnace were suggested. The suitable taken measures with the preliminary calculations let reduce the duration of annealing for 5 - 6 hours, decrease the percentage of reject and increase the productivity of the chamber furnace at 25 - 30%.