Q:- Prior to production welding commencing you notice that the drawing has been revised and now Includes a pipe with a wall thickness of 36mm, your WPS only covers wall thickness of 28mm, what course of action would you follow?

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A. Continuous with production welding as the difference is less than 10%
B. Apply for a concession to change the thickness to permit the welding on the 36mm wall thick pipe
C. Change the range on the WPS to 36mm and allow welding to commence
D. Allowing welding to commence then apply for a concession

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