Hi Gentlemen..

Could anybody please clarify...

The WPS made out of 2 PQRs shall meet QW 451 requirements for essential/supplementary essential variable wrt base metal and deposited weld metal.
Still, the area where I am not very clear is the statemet of QW 200.2(f) ...WITH REGARDS TO Base Metal.

QW 200.2(f).... states a WPS can be written with range 1.5mm thru 32 mm if (1) PQR available with range 1.5 thru 5mm. and (2) another PQR available with range 5mm thru 32mm.

Here{QW 200.2(f)}, the base metal range requirement is not meeting with QW 451, while a WPS made by two supporting PQRs.

[QW 200.4(a) states the base metal range requirement(essential variable) shuld be followed when combining two PQRs..]

Thanks..

Put numbers to understand better your PQR sample.
Weld (groove) together two plates of dissimilar thickness "T": one 10 thick and one 16 mm thick
weld metal thk "t" is limited by the thinner of the two plates: 10 mm
Your PQR qualifies for T from 1.5 mm (because of the plate 10 mm thick) through 32 mm (because of the plate 16 mm thick) and "t" up to 20 mm
Mauro

"Put numbers to understand better your PQR sample.
Weld (groove) together two plates of dissimilar thickness "T": one 10 thick and one 16 mm thick
weld metal thk "t" is limited by the thinner of the two plates: 10 mm
Your PQR qualifies for T from 1.5 mm (because of the plate 10 mm thick) through 32 mm (because of the plate 16 mm thick) and "t" up to 20 mm
Mauro..."

Thanks Mauro for reply....

Here, You mentioned T qualifies from 1.5mm to 32. But, Is this against the code, since "each essential and supp. Essential variables should not be changed while combining"...10mm base metal qualifies upto 20mm only,where as 16mm base plate qualifies from 5mm to 32 only..NOT from 1.5mm.

As you suggested, let me put the numbers

1)PQR(A) - Smaw-4mm thick
PQR(B) - Smaw- 15 mm thick
What would be WPS range if PQR(A) and PQR(B) combined,for Base metal and weld metal...

2)PQR(C) - GTaw-4mm thick
PQR(D) - Smaw- 15 mm thick
What would be WPS range if PQR(C) and PQR(D) combined,for Base metal and weld metal...

3)PQR(E) - GTaw- 10mm thick
PQR(F) - Smaw- 1.5 inch thick
What would be WPS range if PQR(E) and PQR(F) combined,for Base metal and weld metal...

3)PQR(G) - GTaw- 13mm thick
PQR(H) - Smaw- 1.5 inch thick
What would be WPS range if PQR(G) and PQR(H) combined,for Base metal and weld metal..

Thanks in advance

[quote="VJV"]"Put numbers to understand better your PQR sample.
Weld (groove) together two plates of dissimilar thickness "T": one 10 thick and one 16 mm thick
weld metal thk "t" is limited by the thinner of the two plates: 10 mm
Your PQR qualifies for T from 1.5 mm (because of the plate 10 mm thick) through 32 mm (because of the plate 16 mm thick) and "t" up to 20 mm
Mauro..."

Thanks Mauro for reply....

Here, You mentioned T qualifies from 1.5mm to 32. But, Is this against the code, since "each essential and supp. Essential variables should not be changed while combining"...10mm base metal qualifies upto 20mm only,where as 16mm base plate qualifies from 5mm to 32 only..NOT from 1.5mm.

My suggestion was to make each test pieces using T of dissimilar thickness, not applying different PQR each using same T thickness.
Mauro

As you suggested, let me put the numbers

1)PQR(A) - Smaw-4mm thick
PQR(B) - Smaw- 15 mm thick
What would be WPS range if PQR(A) and PQR(B) combined,for Base metal and weld metal...
T= 1.5 thru 30 mm
t= up to 30 mm
Combined: T= 1.5 thru 30 mm

2)PQR(C) - GTaw-4mm thick
PQR(D) - Smaw- 15 mm thick
What would be WPS range if PQR(C) and PQR(D) combined,for Base metal and weld metal...
GTAW: T= 1.5 thru 8 mm; t= up to 8 mm
SMAW: T= 5 thru 30 mm
Combined: T= 5 thru 8 mm

3)PQR(E) - GTaw- 10mm thick
PQR(F) - Smaw- 1.5 inch thick
What would be WPS range if PQR(E) and PQR(F) combined,for Base metal and weld metal...
GTAW: T= 1.5 thru 20 mm; t= up to 20 mm
SMAW: T= 1.5 thru 3 mm; t= up to 3 mm
Combined: T= 1.5 thru 3 mm

3)PQR(G) - GTaw- 13mm thick
PQR(H) - Smaw- 1.5 inch thick
What would be WPS range if PQR(G) and PQR(H) combined,for Base metal and weld metal..
GTAW: T= 5 thru 26 mm; t= up to 26 mm
SMAW: T= 1.5 thru 3 mm; t= up to 3 mm
Combined: T= 1.5 thru 3 mm

Mauro

Mauro,
I agree with all of the numbers you have listed apart from the "T" thicknesses for combination of PQRs.
ASME IX Interpretation IX-04-18 deals with QW 200.4 Combination of WPSs.
PQR A is SMAW 38 mm thick.
PQR B is GTAW 3 mm and SMAW 10 mm
The question is asked if the qualified base metal "T" is 5 mm to 200 mm and the deposited weld metal qualified "t" is GTAW 6 mm max and SMAW 200 mm max.
The answer is Yes

2)PQR(C) - GTaw-4mm thick
PQR(D) - Smaw- 15 mm thick
What would be WPS range if PQR(C) and PQR(D) combined,for Base metal and weld metal...
GTAW: T= 1.5 thru 8 mm; t= up to 8 mm
SMAW: T= 5 thru 30 mm
Combined: T= 5 thru 8 mm
Should this not be T= 1.5 thru 30 mm ?

3)PQR(E) - GTaw- 10mm thick
PQR(F) - Smaw- 1.5 inch thick
What would be WPS range if PQR(E) and PQR(F) combined,for Base metal and weld metal...
GTAW: T= 1.5 thru 20 mm; t= up to 20 mm
SMAW: T= 1.5 thru 3 mm; t= up to 3 mm
Combined: T= 1.5 thru 3 mm
Should this not be T = 1.5 thru 20 mm ?

3)PQR(G) - GTaw- 13mm thick
PQR(H) - Smaw- 1.5 inch thick
What would be WPS range if PQR(G) and PQR(H) combined,for Base metal and weld metal..
GTAW: T= 5 thru 26 mm; t= up to 26 mm
SMAW: T= 1.5 thru 3 mm; t= up to 3 mm
Combined: T= 1.5 thru 3 mm

Not positive about this one but would think it would be T = 5 thru 26 mm
Regards,
BB

Let us stick on the first:

ASME IX Interpretation IX-04-18 deals with QW 200.4 Combination of WPSs.
PQR A is SMAW 38 mm thick.
PQR B is GTAW 3 mm and SMAW 10 mm
The question is asked if the qualified base metal "T" is 5 mm to 200 mm and the deposited weld metal qualified "t" is GTAW 6 mm max and SMAW 200 mm max.
The answer is Yes

I agree with T & t up to 200 mm for SMAW. And I have got the why of the same T limit for GTAW: it can be used as a root layer on a T = 13 mm.
Actually I gave all answers not considering the possibility of using one method as a root layer when T is = or > than 13 mm. as per QW 200.4.
Mauro

BUT! none of the original examples has both PQR with T=> 13 mm. Therefore the Interpretation you quote does not apply to none.
Mauro