As part of the 15 year inspection of our No. 40, all 253 boiler tubes were removed from the boiler to enable a minute inspection of its interior. A new set of boiler tubes were purchased to replace the old ones.
Here, Kjell anneals the ends of the tubes in our rivet forge. Annealing softens the steel so the tube can be easily expanded into the tube sheets and made steam tight. - J. David