ASME IX - QW.261 - Stud Welding Variables

[nacer16]

Dear All

As per Table QW.261 in column "Brief of Variables", QW.405.1, + Position is an "essential variable".
If I understand. And I want to issue a WPS covering all positions 1S, 2S and 4S according to Figure QW.461.7, I have to qualify each position separately. Clearly, I should have 3 PQRs (1S, 2S and 4S).

I need your help to tell me if I'm right or not.

Thanks alot in advance.

 

[metengr]

See below from 2013 Edition of ASME Section IX

QW-405.1 The addition of other welding positions
than those already qualified. see QW-120, QW-130,
QW-203, and QW-303.

Now go to

QW-203
QW-203 LIMITS OF QUALIFIED POSITIONS FOR
PROCEDURES
Unless specifically required otherwise by the welding
variables (QW-250), a qualification in any position qualifies
the procedure for all positions. The welding process
and electrodes must be suitable for use in the positions
permitted by the WPS. A welder or welding operator making
and passing the WPS qualification test is qualified for
the position tested. see QW-301.2.

So, if the WPS for stud welding was written for all positions it is not necessary to re-qualify. If a WPS was written to limit one position of stud welding for whatever reason, by virtue of QW-405.1, you must re-qualify to add a specific position. There is no limit on position for stud welding unless the originator of the WPS decides to limit it.

 

[nacer16]

Dear mentengr

Thanks alot for your quick reply.
But, I'm still confused and I'm still not convinced.
Please, see interpretation below.

Best Regards


Interpretation: IX-04-28

Subject: QW-405.2, Welding Position (2004 Edition)

Date Issued: June 21, 2006

File No: 06-323

Question (1): If a Stud Welding Procedure Qualification is performed in the 4S position does the

same procedure qualification qualify for the 1S position?

Reply (1): No.

Question (2): If a Stud Welding Procedure Qualification is performed in the 4S and 2S position

does the same procedure qualification also qualify for all positions?

Reply (2): No.

 

[metengr]

nacer16;
I should have looked at the interpretations because this is definitive. I will say, that having used Section IX for a number of years, the essential variable is not clear for stud welding position. The way it is stated, you need to re-qualify by adding a position. Yet, the reference to QW-203 makes it confusing indicating unless limited to ANY position , hence the interpretation by the committee. I do not agree with it.

So, you need to qualify for each position using separate PQR's.

 

[nacer16]

Dear mentengr

Thanks alot.
I leave open the discussion in case someone wants to intervene.

Regards