It is called dolly mix because first pass is uphill and remaining pass
are downhill,
moslty qualified as WPS-02. Dollymix is often has more strength than
downhill welding.
On Aug 6, 11:22 am, limesh M <limes...@gmail.com> wrote:
> Dear All,
>
> Is there any technical term called 'Dollymix' in pipeline welding?
>
> I searched lot of literature but all efforts are in vein.I found that
> many contractors WPS says 'Dollymix' progression !!!
>
> Root pass uphill and remaining downhill called dollymix or root and
> hot pass uphill and remaining downhill called dollymix? Is it a local
> terminology or worldwide accepted one?
>
> Regards,
>
> Limesh
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