BACKING RING Welding Data of ASME Section IX 2001

dear reddy,
  you may need to explain little further if this answer is insufficient.

q1. I think you mean the weld is concentric ie annular to the ring. either way whether or not its a pipe (which it isnt) , but that is not the criteria for differentiating the weld .

the essential variables would be the type of weld , thickness , material, range amd welding parameters
, not the product form of the parent component which is not an essential variable to be entered on the WPS.
ASME Section IX are the rules for welding pressure components Under the ASME BPV Code
, but often used as a
criteria for assessing all sorts of other welds. Given your business/industry my guess is its just adopted for use for convenience. Section IX is often used as the criteria for tanks, although the requirements in it go far beyond those product forms.

What it is being used for ie Pressure component versus Non pressure Structural component determines
the normal standard qualification criteria required. (ASME Sec IX) versus eg (AWS D1.1.).
The possible applicable codes varies with service, location and client requirement (amongst many other criteria). eg API 1104 for pipelines

q2.AS it is, it is not a backing ring in the meaning of the WElding Code.., for sure. IN the normal sense of the terminology,a backing ring is never the parent component itself, or inherent in it . The object itself cant constitute and wouldnt therefore qualify as a backing ring. This is just a different joint geometry.
(it may be termed a backing ring for a seal or other machinery component... but its not the same context)

hope this answers sufficiently

• Original Message ----- From: "B. Nagarjuna Reddy" <reddy@heisco.com> To: <PipingDesign@yahoogroups.com> Sent: Tuesday, February 15, 2005 12:45 AM Subject: [PipingDesign] Welding Data of "ASME Section IX" 2001

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> a) Scope:-
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> Code interpretation:- QW-461.9 of Article IV - Welding Data of "ASME
Section IX" 2001 Addenda.
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> b) With reference to the above what qualification do we require, plate
Qualification? Or Pipe Qualification to do welding as depicted in the sketch below
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> There is a circular groove between two plates held vertical to be welded.
The throat of the weld is axial to the circular curvature.
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> Question No. 2
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> a) Scope:- Code interpretation:-
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> i) QW-310.2 of Article III - welding performance qualifications
of ASME Section IX 2001 addenda &
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> ii) QW-469.1 - Butt joint of Article III - Welding performance
qualifications of ASME Section IX 2001 Addenda
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> b) With reference to the above, can the case as depicted in the sketch
below, be taken as welding with backing for performance qualification test?
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> regards
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> Nagarjuna Reddy
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> [Non-text portions of this message have been removed]
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Received on Fri Feb 18 20:56:00 2005