ASME Sec.IX 2023 QW-200.4

[ENG2194]

Im trying to understand what rules must be followed to write a WPS containing more than one weld process from multiple single process PQRs. 200.4(a) paragraph 1 sentence 2 and paragraph 3 indicate that a WPS can have more than 1 welding process. Without looking at 200.4(b) yet, may this be done with multiple single process PQRs of any thickness?

For example can I use a 1/4" full pen. groove GTAW PQR and a 7/16" full pen. groove SMAW PQR (Same P#s) to write a WPS with a base metal range of 3/16" - 7/8", a 1/2" GTAW deposit t, a 7/8" SMAW deposit t, with all other essential variables per their respective process PQRs?

or can these single process PQRs not be combine into a multiple process WPS unless they meet the requirements of 200.4(b)? Also put, is a multiple process PQR the only way to get a multiple process WPS for PQR coupons less than 1/2"?

 

[david339933]

No, you cannot.
GTAW Basemetal qualified: 1/16" - 1/2"
SMAW Basemetal Qualified: 3/16" - 7/8"
Since the GTAW is only good to 1/2" that is the max.

You could use 200.4(b) but your GTAW PQR has to be at least 1/2" Thick.

 

[ENG2194]

Could the PQRs in the example above be used to write a WPS for a base metal thickness of 3/16"-1/2" with a GTAW root and an SMAW fill/cap. If so, either process should be able to deposit weld metal up to 1/2" correct?

 

[david339933]

Correct.