[MW:1522] Re: Significance of HOT PASS

it depends on how WPS stated about interpass temp. (this including
what code is used)
if there is no specific requirements, normaly will be kept higher than
5 degC.

regards,

- Eddy Konga -

On Feb 9, 12:16 am, rafique naik <rafiquen...@hotmail.com> wrote:
> Please let me know for A 106 B 16'' dia  12.7 mm thik pipe to pipe butt joint, if after root pass joint is left as it is for overnight and next morning welder wants to continue with hot pass, can he do welding  without any pre heating..
>
> Regards
>
> Rafique
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