[MW:28467] Re: Query About WPS

according to section 9, deletion of backing & joint design are non-essential variable, Refer QW 402.1 & 402.4. So there is no issue. 

However in SAW, you need to have backing material either as removable backing strip or permanent backing to hold the high heat & weld penetration. in thumb rule, the depth of penetration in SAW is 0.1 X 100 amp for square butt and 0.7 X 100 amp for Y groove welds.

In your case, you have to make separate WPS based on your PQR for SAW only, which should clearly state the applicable proper joint configuration & welding pass sequence.

Thanks & regards

Sandeep Kumar

On Friday, October 19, 2018 at 6:53:31 AM UTC+3, hasin shaikh wrote:

Dear All,

question about weld process use,

 WPS & PQR Based on two process with back-chip and welding

as in PQR Process use in root SMAW and subsequent SAW and back chip with SMAW weld.

in this case can we use SAW PROCESS for back welding? FOR production weld?

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*With Regards
Shaikh.Hasin

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