[MW:23210] Max.Base metal thickness qualified

pl find below reply from mr nandesh kumar on previous post



Your query is exactly as same as the below interpretation. 



Background:  A procedure qualification test coupon using the same or different P-Number materials and consisting of two plates of different thicknesses, T2 = 1-1/2" thick and T1 = 1" thick welded with a single process.  The thicknesses meet on the same plane with neither plate being tapered.  The joint is welded in accordance with the sketch below.


 (Figure can not be attached; left side plate 1" and right side plate 1.5", not tapered only beveled ends) 


 Question (2):  Does this test coupon qualify the WPS for both base metals for a thickness range of 3/16" to 8" on both sides of the weld joint?

 

Reply (2):  Yes.

 

Question (3):  Does this test coupon qualify the WPS for both base metals of different P Numbers for a thickness range of 3/16" to 8"?

 

Reply (3):  No.  QW-202.4 requires both base metal thicknesses be in accordance with QW-451.1.  Base metal T1  is qualified 3/16" to 2" and base metal T2  is qualified 3/16" to 8", except as permitted by QW-202.4(b)(1).

 


QW 202.4 interpretations :


Interpretation: IX-95-12

Subject:            QW-202.4, Dissimilar Base Metal Thicknesses

Date Issued:     March 17, 1995

File No:            95-027

 

Question:  Does QW-202.4 include butt joints and corner joints when joining dissimilar base metal thicknesses when prepared with a groove?

 

Reply:  Yes. 



Interpretation: IX-98-20R

Subject:            QW-202.4(b), Dissimilar Base Metal Thickness

Date Issued:     June 8, 2000

File No:            99-539

 

Question:  When welding a corner joint with dissimilar base metal thickness, the thickness of both members must be within the qualified thickness range of the WPS(s) being used.  How is the thickness for the thicker member defined in sketches (a), (b) and (c) below?

 

Reply:  For sketch (a), the thicker of T or ts.  For sketch (b), the thicker of T or ts.  For sketch (c), the thicker of flange a or hub b.


(Figures can not be attached)


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