I retubed a steel boiler - copper tube type 7 1/4" Hunslet.
All I did was make 2 very slow tapered drift, grease it well jack the firebox end in and thrape the smokebox end in with a big hammer .
A lot quicker and easier than tube expanders, and non have leaked to date ( Fitted 9 years ago)
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The Worlds Smallest Steam Roller......whatever next??
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