Monday, February 9, 2009

[MW:1523] Re: Significance of HOT PASS

You can not stop before hot pass is completed.. If you have to then conduct NDT, preheat and continue.

--- On Mon, 9/2/09, Sukamal Naskar <sukamalbecmet@gmail.com> wrote:
From: Sukamal Naskar <sukamalbecmet@gmail.com>
Subject: [MW:1521] Re: Significance of HOT PASS
To: materials-welding@googlegroups.com
Date: Monday, 9 February, 2009, 2:52 PM

Pre-heating is not as such required, but it is a good practice to use flame heating at the joint to remove the moisture or any foreign particles before starting the welding on the next day.

Regards
Sukamal Naskar
Welding Engineer 

On Mon, Feb 9, 2009 at 1:16 AM, rafique naik <rafiquenaik@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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Sukamal Naskar
Malaysia

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