ASME IX QW200.4 (a) and (b) and QW401.3 2

[nnlpba]

QW 401.3 allows for additional impact tests to supplement and existing PQR while maitaining the essential variables.
Question: The original PQT was qualified on 1/4" material and the additional impacts were conducted on 3/8" material.
Is the range for non impacted material 1/16" to 3/4" or 1/16" to 1/2".


QW 200.4 (a) (b) Can you develop a new WPS based on the following:A PQR was developed using GTAW and SMAW on 3/8" material with GTAW at 1/8" and SMAW at 1/4".
and another PQR was qualified using GMAW pulse on 3/8" material.
The new WPS would consist of GTAW root and GMAW fill with the following ranges Root 1/4" MAx" Fill 3/4" max.

Do the PQR cupons needd to be 1/2" thick in order to develop this new WPS. QW200.4 (b)

 

[metengr]

Based on the 2004 Edition of the ASME B&PV Code,

1. 1/16" - 3/4" if the essential variables were not changed and the supplementary essential variables are followed, per QW-401.3

2. Yes, multiple PRQ's can support a WPS, see QW-200.4 (a) However, since the coupon thickness is 3/8", the root is qualified to 1/4" using the GTAW process and fill with GMAW is qualified to 1/2" deposit thickness.

3. QW-200.4 (b) paragraph only applies to qualification of various processes for root deposits only.

 

[henri2]

metengr,

In the case of AWS D1.1, folks who develop WPSs also use multiple PQRs to develop a WPS...example: root pass SMAW..intermediate passes FCAW etc. I accept that to be the case but I have searched Sec 4 of D1.1 for the provisions that permits this but to no avail. I'd appreciate it if you could provide the Sect when you find time.

 

[weldtek]

I see the answer to the first question being, 1/16 - 1/2". Please let me know if I'm missing something.

Regards,

 

[weldtek]

henri2
Have you reviewed par 3.6.1 in D1.1?

 

[henri2]

weldtek, thank you so much.

 

[metengr]

weldtek;
You caught my typo – good catch, 3/4" should be 1/2". Per QW-401.3, a WPS can be revised to include impact testing using the same essential welding requirements provided an additional coupon is welded to the same essential welding requirements as the non-impact qualified WPS, and adding the Supplementary Essential Welding requirements, per ASME Section IX. Since the original WPS was qualified using a 1/4" coupon thickness, the added coupon for impact testing would be required to be at least 1/4" in thickness.