[MW:20693] QW 202.2 (c): Pressure retaining fillet welds be qualified by means other than a groove weld test coupon?

the following question is in specific to socket welds of a piping system (as per below interpretation not permitted for socket welds?)

QW 202.2 (c) Qualification for Fillet Welds. WPS qualification for fillet welds may be made on groove-weld test coupons using test specimens specified in QW-202.2(a) or (b). 
Fillet-weld procedures so qualified may be used for welding all thicknesses of base metal for all sizes of fillet welds, and all diameters of pipe or tube in accordance with table QW-451.4. Nonpressure-retaining fillet welds, as defined in other Sections of the Code, may as an alternate be qualified with fillet welds only. Tests shall be made in accordance with QW-180. Limits of qualification shall be in accordance with table QW-451.3.

Interpretation: IX-89-87
Subject: Section IX, QW-202.2(c)
Date Issued: January 2, 1991
File: BC90-745

Question: May pressure retaining fillet welds be qualified by means other than a groove weld test coupon?

Reply: No

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