szuiderveen Wrote:
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>
> Boilers were built new in the '20's to add
> superheat and keep the factor of safety to the
> recently enacted by ICC factor of 4.
>
Do you have a source on that? I've never heard that before in relation to the Class 125 (K-27) engines.
Well, 451, which never got SH, got a new boiler after it blew up in '23, but I had thought on the rest they just put in new flue sheets to accomodate larger flues needed for SH tubes?
hank