Size of Filler Metals (QW-404) ASME IX

[sw23cyp]

I am reviewing PQRs and WPSs for BPVC and am trying to understand how the range used for the size of filler metals (QW-404) is determined. For example, the electrode used for the PQR was 3/32" and the range given on the WPS is 3/32" to 5/32". The test coupon thickness is .432" with a maximum pass thickness recorded at .200".

Thank you

 

[stanweld]

Assuming that the procedure is for the SMAW process and heat input is not a supplementary essential varialble, the diameter range is a nonessential variable. The WPS has specified the nominal sizes to be used. A change in the nominal sizes specified would require writing a new WPS. Per QW-409.8 the current range for each electrode size must also be defined in the WPS.

 

[sw23cyp]

Thank you so much for your quick response. Your assumptions are correct regarding process and variables. I think my question stems from my inexperience and ignorance.

On the PQR there is only one filler metal size listed, 3/32", in QW-404 for layer one with a weld metal thickness of .125"; layers two and three do not list a filler metal size but a weld metal thickness of .307" is recorded under layer two. The current recorded on the PQR is recorded as (1) 70 (2) 130.

On the WPS under QW-404 the size of filler metals is listed as "3/32 thru 5/32" and under QW-409 there are three seperate electrode diameters listed: 3/32", 1/8" and 5/32" with their respective amperage ranges.

I do not understand why there is only one diameter listed on the PQR but three on the WPS. If the 3/32" was the only diameter used for the PQR, why is 1/8" and 5/32" also listed on the WPS? Am I looking at an incomplete PQR?

I have attached the WPS and PQR for reference. There are other mistakes on them, I did not write them, just trying to understand them.

Thank you again

 

[Kiwi2671]

sw23cyp,
Please do not take this comment harshly but how do you review something you do not understand yourself ?
See if you can get a copy of the CASTI Guidebook to ASME Section IX Welding Qualifications - very informative guidebook that will help you immensely,
Regards,
Kiwi

 

[stanweld]

You ARE looking at an incomplete PQR, but the electrode size is a nonessential variable and the WPS may define additional electrode diameters beyond that used in qualification. As Kiwi queried, why are you reviewing a Welding Procedure when you have not the background knowledge or experience to do so?

I would advise taking a course on ASME IX; provided through the ASME or Code West as a starter.

 

[sw23cyp]

Thank you both for your input. I am not the final step in our PQR/WPS reviews. I was a welder and machinist prior to becoming an engineer. As soon as I can get the authorization to do so, I will attend an ASME IX course. However, until that time I still have to try to understand what I am reading.

 

[stanweld]

Recommend reading the AWS Handbook, Welding Processes. This will provide considerable insight. By the way, the WPS/PQR transmitted should be rejected.

 

[moseley]

A very incomplete PQR or did you remove information to protect the incompetent?