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RE: Weld Fractures (refrain)

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You are correct.  The minimum ambient temperature is process dependent, but
welding in general is not allowed when the ambient temperature drops below 0
degrees F without special procedures for preheating and maintaining heat.
Also when the base metal temperature is below 32 degrees F, the base metal
is to be preheated and maintained at 70 degrees F.

Harold O. Sprague

> -----Original Message-----
> From:	Bill Polhemus [SMTP:bpolhem(--nospam--at)]
> Sent:	Wednesday, December 20, 2000 11:24 AM
> To:	seaint(--nospam--at)
> Subject:	Re: Weld Fractures (refrain)
> Harold, it has been awhile for me, but aren't there some preheat
> requirements
> for cold ambient temperatures?
> "Sprague, Harold O." wrote:
> > 
> > Normally A53 B pipe is thought of as low carbon requiring no preheat for
> up
> > to 3/4" thickness.