The polished surface shall be examined at Qualification Test Coupons and Testing. One edge of one strip from each coupon shall be polishedto a 600 grit finish with the final grinding parallel to the long QW-199.2 Flash Welding - Performanceaxis of the strip. D p OD of the tube (b) In lieu of QW-163, the sum of lengths of individual t p nominal wall thickness open flaws on the convex surface of all the bend test w p width of the specimen specimens taken from each pipe individually shall not exceed 5% of the outside circumference of that test pipe. 1, Groups 2 through 4 materials, the mini- mum bend radius (dimension B in figure QW-466.1) shallwhere be three times the thickness of the specimen. D/8 for pipes greater than NPS 2 (DN 50) (a) For P-No.
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