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Up Topic Welding Industry / Technical Discussions / ASME Section IX
- - By Mike Lanfranconi Date 11-18-2009 02:11
I am new to this code and it was brought to my attention that in section 4 QW-409.22 only refers to welds that require a charpy V notch test. What truth is there to this. To me Voltage and amperage qualified would be en essential variable.
Parent - By 803056 (*****) Date 11-18-2009 04:40
Welcome to the wonderful world of ASME Codes where common sense plays no part in reality.

Best regards - Al
Parent - - By jon20013 (*****) Date 11-18-2009 08:20
Mike, I'm not sure you cited the correct paragraph?  QW-403.6 is what deals wth range of thickness for impact testing and even then only addresses minimum thicknesses.  Impact test requirements are ALWAY a function of the constructing code, not the qualifying code. 

However, for reference, here's what QW-403.6 says: QW-403.6 The minimum base metal thickness qualified is the thickness of the test coupon T or 5⁄8 in. (16 mm), whichever is less. However, where T is less than 1⁄4 in.(6 mm), the minimum thickness qualified is 1⁄2T. This limitation does not apply when a WPS is qualified with a PWHT above the upper transformation temperature or when an austenitic material is solution annealed after welding.

In my edition of the ASME IX Code, your reference to QW-409.22 reads as follows: QW-409.22 An increase of more than 10% in the amperage used in application for the first layer.

In this case, QW-409.22 is for hardfacing and corrosion resistant overlays.

Are you, by chance working with temper bead applications?
Parent - - By Mike Lanfranconi Date 11-19-2009 11:58
My appologies it is actually clause QW409.23 and we are just talking about groove welds on plate for qualification in the 3G position.
Parent - By jon20013 (*****) Date 11-19-2009 13:02
Mike, in my copy of ASME IX, which is a 2007 Edition, the only place QW-409.23 "A change of more than 10% in the ranges of amperage or voltage qualified" is in Table QW-257.1 which is for qualifying procedures for Plasma-Arc Welding (PAW), and even then, only for Hard-Facing Nonessential Variables for Hard Facing Overlay (HFO) by Spray Fuse (HFSF).

I think you may have gotten some bad information or are maybe mis-reading ASME IX?

The QW-200 Articles are for procedure qualification and tell you where to go in QW-400 Articles for variables just as the QW-300 Articles are for performance qualification and also send you to QW-400.

From what you describe, I dont think QW-409.23 applies to you at all.
Up Topic Welding Industry / Technical Discussions / ASME Section IX

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