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 Post subject: Position of groove
PostPosted: Wed Dec 24, 2008 8:55 am 
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Posts: 64
1.If I make a PQR test in 1G position, can I use this WPS (qualified for 1G) in job where the 5G/6G welding involved (No impact requirement in job-material is stainless steel)

2.Can I use this WPS (qualified for 1G) to qualify the welders for 5G/6G/other positions?


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 Post subject: Re: Position of groove
PostPosted: Wed Dec 24, 2008 11:30 pm 
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Joined: Sat Dec 01, 2001 1:00 am
Posts: 869
Location: Essen, Germany
1) Well, when the PQR was welded in the 1G, it qualifies for all positions, provided the welding process and the weld consumables are suitable for this position. Sub-arc overhead is not possible, you can try.
Please refer to QW-405.1, which is a nonessetial variable.

2) you can not use a WPS to qualify a welder. You can use the WPS to instruct the welder for welding the test coupon, or you can use the PQR to qualify the welder who welded it. However, a 1G test coupon will qualify the welder only for FLAT position welding, nothig else. In this case QW-405.1 is essential.

DK


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 Post subject: Re: Position of groove
PostPosted: Sun Dec 28, 2008 10:31 am 
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Thanks. If I have a WPS test run made in 1G can I use this WPS for qualifying other welders for 5G/6G/3G positions.


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 Post subject: Re: Position of groove
PostPosted: Sun Dec 28, 2008 2:23 pm 
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Joined: Thu May 25, 2006 6:51 pm
Posts: 99
Location: Germany
Hi,

please have a look at the applicable tables QW-352 to QW-357 and you can read, regardless to the process each of the variables are essential variables. That means the position to.

The reference via QW-405.1 and QW-303 to table QW-461.9 give you the answer: 1G qualifies for F (flat position) only.
Please note there is a difference between test position (e.g. 1G, 5G or 2F) and the qualified position F, H, V or O.

_________________
Kind regards,
Juergen Fleischfresser


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 Post subject: Re: Position of groove
PostPosted: Mon Dec 29, 2008 8:50 am 
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Joined: Thu May 01, 2008 12:17 pm
Posts: 86
Location: Kazakhstan
Juergen;

If I read correctly, this person is asking if he can use a WPS, which was qualified (PQR) in the 1G position as instruction for welder's to use when qualifying in positions other than 1G.

I believe he can, provided the WPS is permitted to be used in all positions.

That said, the welder who would be qualified by virtue of running the PQR coupon would ONLY be qualified in the 1G unless additional positions were tested.

People often tend to confuse the variables of QW-200 and QW-300. In most cases, for QW-200, position is a non-essential variable, hence 1G qualifies ALL positions for the WPS. It's only when notch toughness is required that Supplementary Essential Variables kick in and can be controlled by running the PQR in the vertical up position.


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 Post subject: Re: Position of groove
PostPosted: Mon Dec 29, 2008 12:29 pm 
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Mr jon20013,
You have correctly interpreted my question and Thank you very much.


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 Post subject: Re: Position of groove
PostPosted: Tue Dec 30, 2008 3:04 am 
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Joined: Fri Aug 01, 2008 12:34 am
Posts: 68
Location: Thailand
Hi Jon,
A very Merry Xmas to you and Karen,
While I agree totally with your response I do not agree with qaqcmpms request.(or maybe the way he has written his request).
Why would you give a welder a 1G WPS when he is doing a 3G,5G or 6G test.? Why would you not write a separate WPS for each position or as some people do make it a multiple position WPS based on the 1G PQR?
Calling it a 1G WPS basically states that all the variables are based around a flat downhand weld. While amps, volts, travel speed are not essential variables the whole idea of a WPS is to give guidelines to the welders, how are we helping the welder when we give him variables for a flat weld when he is in fact welding vertical.
All the best for the New Year,
Ballbearing


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 Post subject: Re: Position of groove
PostPosted: Tue Dec 30, 2008 8:23 am 
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Joined: Thu May 01, 2008 12:17 pm
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Location: Kazakhstan
Thanks Shane and a veryMerry Xmas and Happy New Year to you also.

In reading qaqcmpms question, I feel I knew what he was saying, if perhaps it confused some in the wording.

ASME IX, for the most part, allows PQR's to be run in 1G position, which the Engineer may then state on his WPS that it is qualified for ALL positions. Thats because in most instances, position is not an essential variable for qualification of procedure - PQR; (it is, of course, for performance qualification).

The welder running the PQR coupon(s) would be qualified for 1G ONLY, however all other welders could use the WPS to qualify in any position deemed appropriate. Further, the welder running the PQR could subsequently qualify in any position as deemed appropriate... Make better sense now?

qaqcmpms was asking if his WPS was qualified in the 1G position, could welders then use it as direction for qualifying in other positions and the answer is yes, but as pointed out in the SAW example, if it is appropriate to the process (as deemed by the Welding Engineer).


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