When replacing tubes in a water-tube auxiliary boiler, to eliminate the possibility of leaks at the tube seats, the replacement tubes should be __________.
A
stress relieved to ensure expansion when rolled
B
annealed to prevent cracking when rolled
C
fitted with a welded backing ring in the seat area
D
rolled, beaded, and seal welded around the bead edge
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Question 1 / 205eccefa2bacbc34ba4d47bdd
Question 1 of 205eccefa2bacbc34ba4d47bdd
When replacing tubes in a water-tube auxiliary boiler, to eliminate the possibility of leaks at the tube seats, the replacement tubes should be __________.
When replacing tubes in a water-tube auxiliary boiler, to eliminate the possibility of leaks at the tube seats, the replacement tubes should be __________.