The reason I mention QW-451 is to note that 4 bend specimens is the amount needed and that there is no mention in QW-451 of the amount needed other than 4 bends. The way I’m Interpreting the Scenario I originally posted about is that an additional bend specimen, meaning 1, would be called for and allowed as long as the welding parameters weren’t at fault, to be bent in place of the failed specimen. If the additional bend specimen passes, then the guided bend test portion of the procedure qualification test is considered acceptable and is given a passing grade due to the Criteria of four bends being met. I was recently told by the lab that the one failed bend specimen warranted two additional bend specimens to be of acceptance in order to pass the guided bend portion of the test. Now if you go by that assumption, that would mean that you would need five Bend specimens total to qualify a procedure qualification record and four bends is now Irrelevant. This is where QW-451 is of value in my opinion. 4 is the magic number. Short and sweet, I feel that the lab is creating there own guidelines when following QW-202.1. Ask yourself this? Why stop at 2 bends? Why not 10 additional bends? ASME IX makes no mention of a “two for one”. Anyhow, that’s my thoughts on the matter. Can someone enlighten me to if there is such wording in ASME IX backing the stance that the lab has taken in this matter?
Regards,
Jamie