ASME Sec IX QW-288.3(e) Rods Diameter
ASME Sec IX QW-288.3(e) Rods Diameter
(OP)
Hello,
I would like to ask if anyone has information about ASME Sec. IX regarding PQR essential variables as per QW-288.3(e)for Tube to Tubesheet heat exchanger weld:
QW-288.3 Gas Tungsten Arc, Plasma Arc, and Gas Metal Arc Welding:
(e) For GTAW or PAW, a change in the nominal diameter of the filler metal or electrode.
Well it is clear enough that the diameter of the filler metal is an essential variable; however, I just need to confirm if this essential variable is a must to be applied in production weld exactly as per PQR layer arrangement, e.g. if PQR root pass filler metal dia was 1.2mm, hotpass dia used 1.6 mm, third layer 2.0 mm, can I use in production weld 1.6 mm dia for root layer and 2.0 mm for balance instead? knowing that PQR already used these sizes with different layers.
ps, I've posted this thread in structural engineers-welding.
Thank you in advance.
AZAR
I would like to ask if anyone has information about ASME Sec. IX regarding PQR essential variables as per QW-288.3(e)for Tube to Tubesheet heat exchanger weld:
QW-288.3 Gas Tungsten Arc, Plasma Arc, and Gas Metal Arc Welding:
(e) For GTAW or PAW, a change in the nominal diameter of the filler metal or electrode.
Well it is clear enough that the diameter of the filler metal is an essential variable; however, I just need to confirm if this essential variable is a must to be applied in production weld exactly as per PQR layer arrangement, e.g. if PQR root pass filler metal dia was 1.2mm, hotpass dia used 1.6 mm, third layer 2.0 mm, can I use in production weld 1.6 mm dia for root layer and 2.0 mm for balance instead? knowing that PQR already used these sizes with different layers.
ps, I've posted this thread in structural engineers-welding.
Thank you in advance.
AZAR





RE: ASME Sec IX QW-288.3(e) Rods Diameter
RE: ASME Sec IX QW-288.3(e) Rods Diameter
Cheers,
AZAR
RE: ASME Sec IX QW-288.3(e) Rods Diameter
I looked through ASME interpretations before my initial reply. There were no relevant interpretations for this matter.
Common sense always needs to be applied to any welding situation, and it is your responsibility to make sure this happens.If you remain concerned, have several PQR's made with different filler metal diameters for each of the various passes.
ASME IX QW-288.3(e) reads as follows: "For GTAW or PAW, a change in the nominal diameter of the filler metal or electrode". I imagine if the ASME IX Committee felt this required additional consideration, this variable would have been stated differently.
RE: ASME Sec IX QW-288.3(e) Rods Diameter
Thank you for your replies; its really appreceiated.