Re: [MW:10580] RE: 10463] Backing

Mr Karthik

 see the clarification, it is a back weld(double side), and i go with john

 

Pandithan, AWS-CWI,CSWIP 3.1

In-Charge/Welding Technology

Cethar Vessels Ltd

Trichy

On Wed, Mar 23, 2011 at 8:11 PM, John Henning <jhenning@deltak.com> wrote:

YES – it is welding with backing.

 

See QW-402.4, non-essential variable for both SMAW and GMAW and an essential variable for welder performance qualification for both processes per QW-416.

 

"QW-402.4  The deletion or the backing in single  welded groove welds.  Double welded groove welds are considered welding with backing."

 

John

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Venkateswaran
Sent: Wednesday, March 23, 2011 4:11 AM
To: materials-welding@googlegroups.com
Subject: [MW:10463] Backing

 

 

As per ASME SEC IX ,we qualified PQR(SMAW/GMAW process) with 8mm/10 mm thickness plate full penetration welding( Root Land:1mm to 1.5 mm) as root ,hot and cap welding and then back/root side of plate was grounded(approx 2mm) to sound metal and one pass of cap welding was done in root side.

My question is whether is method is considered as welding with backing or with out backing it is considered as backing. how?

 

 

 

Regards,

 

kvr

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