Welder qualification ASME-IX

[raj susi]

Dear experts
Good day.in Asme sec IX for welder qualification-
in my previous company I have seen that they use production weld followed by Rt to qualify a welder, but now in my new company sometimes they are using production weld and sometimes by a welder qualification coupon.
So please tell me whether we can do either way or which is best way or in which condition we should follow any of the 2 ways.
And secondly for renewal of welder qual for 6G position.
Can we do a test coupon of 1G position and if Rt and other nde passes can he weld 6G position again or he must do a 6G test coupon to renew a 6G Welder qualification.
Thanks and regards.
Raj

[Guoliang Xue]

he must do a 6G test coupon to renew a 6G Welder qualification

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George Xue (Xue Guoliang)
Suzhou CXGL Mechanical Engineering Co., Ltd.
Tel: +86-512-68639769 Fax: +86-512-68639492
Email: cxuegu...@gmail.com
Skype: xuegl2001

2012/6/16 raj susi <rjs...@yahoo.com.sg>:

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[Ammar Shaikh]

In my company, we test welders on production weld too but this is considered to be a very risky practice because failure of welder qualification will result in cut out of joint. Originally a welder should be tested on test coupon meant for qualification but what we do in our company is that we test whose welders directly in production who have a strong track record and we are confident enough about them and other welders we test on test coupons. Some times it happens that welders employed by a company working on one project are when shifted to other project they are tested directly in production to carry out client documentation procedures and new welders are tested on test coupons.

Ammar Shaikh

Welder must be renewed on 6G

Raj

[Mohamad Shah Gubah ahmad]

ha ha

 

that acceptable if used production joint as coupon. but if fail/joints rejected during inspection for qualification that joint also rejectes and shall be cut out and shall be repair by qualified welder.

[John Henning]

In response to Raj’s orginal question, if the weldor is question requires a renewal of qualification per ASME Section IX, this is addressed in QW-322.2.  For a welder whose qualification has merely expired (i.e. not disqualified for cause) then QW-322.2 (a) applies.  QW-322(a) states:

“Renewal of qualification expired under QW-322.1(a)  may be made for any process by welding a single test coupon of either plate or pipe, of an material, thickness or diameter, in any position, and by testing of that coupon as required by QW-301 and QW-302.  A successful test renews the welder or welding operator’s previous qualifications for that process, for those materials, thicknesses diameters, positions and other variables for which he was previously qualified.

Providing the requirements of QW-304 and QW-305 are satisfied, renewal of qualification under QW-322.1(a) may be done on production work.”

 

Thus, Raj, if welder has only passed his qualification expiration date, he may bring back all qualifications he earned for a welding process by performing a single welding test with that process.  There are no restrictions on position, material, filler metal type etc., it is only based on process.  Obviously, if you want greater assurance of the welder’s ability you can choose to use a more challenging position, filler metal, etc.   Per QW-322.2(a) he can even use a production weld to renew qualification.

 

If the welder has been disqualified due to inability to make sound welds, he must requalify for each essential variable change in addition to process. See QW-322(b)

 

As has been stated previously, qualification with production welds has an inherent risk in that if the weld is unacceptable it will have to be removed.  Depends on your comfort level with his skill.  To me it is obvious that a simple test on a relatively thin coupon can be done quickly and inexpensively and without any risk to a production part.

 

John A. Henning

Welding & Materials

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[arijoy roy]

Dear Experts

We have client whos is welding a box structure , with one single v joint. Include angle 60 degree , root face 1.5 mm , root run Mig welding. fillup run SAW. 

Please let me know the samples required for welder qualification and process qualification and what should be the non- essential variables and non-essential variables. 

With Regards

Arijoy Roy 

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From: Lakine <laki...@gmail.com>
To: material...@googlegroups.com
Sent: Monday, 25 June 2012 8:13 PM
Subject: [MW:14687] Re: Welder qualification ASME-IX

Raj,

Can we do a test coupon of 1G position and if Rt and other nde passes can he weld 6G position again or he must do a 6G test coupon to renew a 6G Welder qualification.

 of course, for renewal welder in ASME IX, they only care welding process. If they use that welding process with his range (process, thickness, diameter), position is not mention here.So, you can renewal it