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Re: [MW:21719] Is preheating requirement based on weld-metal or base metal

By Materials & Welding

For some P numbers preheat is mandatory
Best regards
Dr Georgios Dilintas
Authorized Nuclear Inspector
Authorized Inspector Supervisor
HBS Regional Technical Manager

  From: Mohit Aggarwal [aggarwalmohit05@gmail.com]
  Sent: 08/26/2014 11:58 AM ZE5B
  To: materials-welding <materials-welding@googlegroups.com>
  Subject: Re: [MW:21706] Is preheating requirement based on weld-metal or base metal


Dear,
Preheating is required min.100 deg as thk is greater than 25 and it is good engineering practice..

Best Regards,
Mohit Aggarwal.

On 26-Aug-2014 10:44 AM, "Mhaskar Aly" <mhaskar.aly@gmail.com> wrote:
Dear Friends,
Kindly clarify whether preheating requirement is based on weld-metal or base metal.

I have a PQR with 36mm thk base metal 8mm GTAW & 10mm SMAW

WPS 
Base metal 5-36mm
Weldmetal: 20mm max.(SMAW)
Weldmetal 16mm max (GTAW) 

If I have to do10mm fillet weld with SMAW process for 10mm thk Skirt to Base metal 36mm corner joint, is preheating required?

Please provide your response with Code reference

Thank you in advance

Aly

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