Wednesday, July 8, 2015

Only 246 to Go...

A milestone in our rebuilding of No. 40 has been reached: All of the new boiler tubes are in the boiler! Wayne and Kjell, assisted by Morgan and Ron made short work of sliding the tubes into their holes in the front and back tube sheets.

Here Kjell lines up a tube in its hole.
Now the process of expanding the tubes into their holes making them water and steam tight will begin. Once expanded, the ends at the back (fire box) end will be beaded using an air hammer and specially shaped tool. Then any excess material at the front (smoke box) end will be trimmed off, the beads seal welded to the rear tube sheet and then lightly expanded again.

When all this has been done, No. 40 will be ready for a hydrostatic test of the boiler. - J. David

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