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[MW:1645] Re: Combination of PQRs

By Materials & Welding
Per QW-200.4 (b). When a process is used for the root weld and is
qualified on a base metal 13mm and thicker, then that PQR can be used
in combination with another PQR qualified for any greater thickness to
write a single WPS. The root process is limited to 2 times the
deposit thickness performed on the first PQR.

In your particular case the base metal qualified thickness is 10mm to
200mm, SMAW may be used for the root weld (and hot passes) to a
maximum deposited thickness of 30mm, SAW is qualified to a maximum
deposited thickness of 200mm.


Another example: PQR 1 - Qualified on 15mm plate, root weld GTAW with
deposit thickness 5mm, balance of weld SMAW (10mm)
PQR 2 - SAW qualified on 40mm plate (back
gouged and back welded) with deposit thickness 40mm
(Assuming all other essential variables are
satisfied and impacts are not required)

WPS supported by PQR 1 with GTAW root and PQR 2 SAW fill:
Qualified base metal thickness range: 10mm to 200mm (QW-451.1
range for SAW)
Maximum qualified GTAW root deposit thickness: 10mm (2t - GTAW)
Maximum qualified SAW deposit (fill) thickness: 200mm

Reference: Interpretations IX-81-32, IX-04-18, IX-80-NNAE

J

On Feb 25, 7:33 am, Muhammed Ibrahim <ibrat...@gmail.com> wrote:
> Dear All,
>
> With ref to QW 200.4 (b) combination of process
> PQR A - 15mm with SMAW process
> PQR B- 40mm with SAW process
>
> Wht is the base metal thk. qualified if we cobines WPS SMAW + SAW
> Will it be *5 to 30mm(with both SMAW & SAW - 30mm* or *5 to 200mm( with
> SMAW-30mm & SAW 200mm)*
> **
> *If any interprtation to this condition is there then it will very helpful*
>
> Thanks & Regards
> Muhammed Ibrahim PK

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