[AT] Welding Rails

[Stephen Offiler]

Interesting, but not very helpful:

https://www.youtube.com/watch?v=f9i4aMYTv8o

On Fri, Nov 29, 2019 at 5:17 PM James Peck <jamesgpeck at hotmail.com> wrote:

> You have got me curious. I am going to guess resistance welding if you say
> that the rail ends are pushed together.
>
> https://en.wikipedia.org/wiki/Electric_resistance_welding
>
> Howard Pletcher AT List Member AT List Member (mailto:hrpletch at gmail.com);
> The process is mostly automated and details are hidden by the equipment.
> The rail joint comes into the welding station, the operator cleans the
> ends, the door closes, and there’s 2 seconds of arcing.  My understanding
> is it begins with a small gap between the ends and as the steel begins to
> melt from the arc, it is shoved together with high pressure. I assume the
> rails are clamped between (large) contacts to apply the current—should have
> asked for more details.
>
> Mentioning dimming city lights, they melt 120 tons of scrap in an electric
> arc furnace in a batch. They said this uses the same current as the city of
> Fort Wayne. Fortunately they are on their own distribution lines so the
> lights don’t go out.
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