On Fri, 15 Jul 2011 06:21:30 -0700, harry wrote:

On Jul 15, 2:12Â*pm, Andy Breen wrote:
On Fri, 15 Jul 2011 06:03:02 -0700, harry wrote:
On Jul 15, 12:21Â*pm, TBirdFrank
wrote:
Welding - cast iron - boiler explosions???

shurely shome mistake

Boilers are not cast iron just for starters

In days of yore there were steam cast iron boilers. But not on
locomotives.

Except there were. Only in the early days, I'd admit, but the first
commercially successful locomotives (and the first locomotives to be
built as more than prototypes, and the first exported..) had cast-iron
boilers.


Yes, you're right the Penydarren locomotive is thought to have had a
cast iron boiler.


As did the Murray/Blenkinsop machines at Middleton (and elsewhere!)
and, IIRC, the Gateshead "Trevithick" and its immediate descendent,
the Wylam 'Black Billy'. Sunsequent Wylam 2-cyl machines, together
with all of Old George's locomotives and all the varied Chapman/
Buddle machines, used wrought iron though. Presumably plates of a
suitable size got cheap enough somewhere between 1812-13 and 1814-15..
--
Andy Breen, not speaking on behalf of Aberystwyth University "The
internet, that wonderful tool for bringing us into contact with things
that make us wish we could scrub our brains out with dental
floss.." (Charlie Stross)