WPS/PQR 2

[sftyvlv1]

Do I need to develop a WPS before a PQR and if so why?
It seems like "putting the cart before the horse"
Thanks

 

[david339933]

No. Not necessary.

 

[david339933]

Standard Designation: BPV Section IX
Edition/Addenda:
Para./Fig./Table No:
Subject Description: QW-200.2, Use of Preliminary WPS
Date Issued: 03/14/2011
Record Number: 10-1158
Interpretation Number : IX-10-22
Question(s) and Reply(ies):

Question: Does ASME Section IX require a preliminary WPS be used during procedure qualification testing, or that a WPS number be recorded on the PQR?

Reply: No

 

[sftyvlv1]

Thanks David,

I can't remember where I read this, but I was under the impression that the WPS came before the PQR,
which doesn't make any sense.

 

[DVWE]

Sure, not necessary, but not one size fits all.

If you are working with a material that is common, or that the welder welding the test coupon is familiar with, then a preliminary WPS will probably be of little use.

However, if you are working with an uncommon material, or a material that the welder is not comfortable welding, I would try to get a copy "for reference only" from anyone in the industry that has had success welding the unfamiliar material and is willing to share and provide any tips that would be helpful for success.



The devil is in the details; she also wears prada.

 

[sftyvlv1]

Thanks DVWE

 

[weldstan]

For the most part, I wrote a preliminary WPS denoting filler metals, base material and thickness, minimum preheat and maximum interpass temp (when required), PWHT (when required for the test lab), shielding gas composition(s) and minimum travel speed (when required). Our welder who qualified our welding procedures was quite appreciative of this kind of information. We always discussed process and parameters prior to qualification.

 

[sftyvlv1]

Thanks Weldstan

 

[XL83NL]

Yes you must.
And no not necessarily.

It depends. It depends on the code of construction which you haven’t specified. Most of us assume ASME IX, I guess. For ASME the answer has been given.
For EN ISO 15614, which would be my assumption, a pWPS is a requirement if I’m not mistaken. Amongst others, it defines the qualified range for the PQR once the test results of the pWPS are satisfactory.

 

[sftyvlv1]

XL83NL
Thanks. Now that you mention it that reminds me of another question pertaining to
codes of construction.
I'll post another question on the matter.