Interpretation<\/a>.<\/p>\n\n\n\nLet us examine the problem a little further. Can this welder deposit 20 mm with E7018?<\/p>\n\n\n\n
The first 15 mm get supported by Qualification 2 straightaway. However, the Qualification 1 cannot be used to support the next 5 mm. Because F number is an essential variable, and a welder qualified with F3 is not qualified for welding with F4.<\/p>\n\n\n\n
Consider another version of the problem. Assume that the test coupon (on which the welder did his qualification) was 15 mm thick. The welder deposited 7.5 mm thickness with E6010, and remaining 7.5 mm with E7018 electrode. The total deposited weld thickness is 15 mm, that is \u2013 more than the 13 mm required by QW 452.1(b) for qualifying the welder for depositing unlimited thickness.<\/p>\n\n\n\n
Is the welder qualified for depositing unlimited thickness in job with F number 3 electrodes?<\/p>\n\n\n\n
The answer is no. If the coupon had been welded with either one of the electrodes, the total thickness deposited in an individual qualification would be counted as 15 mm. This would qualify him for unlimited thickness in accordance with QW 452.1(b).<\/p>\n\n\n\n
Here however, two F numbers have been used. F number is an essential variable. Hence, the coupon has to be treated as two different qualifications. The thickness of the weld metal qualified has to be determined individually for each qualification.<\/p>\n\n\n\n
It thus follows that the welder is qualified to deposit up to 15 mm thickness using E6010 and up to 15 mm using E7018 electrode, either collectively in a single groove one after another, or individually in different grooves. In a single groove, he is also qualified to deposit 30 mm with E6010 electrode, like we just saw above.<\/p>\n\n\n\n
So this was about how to reckon the qualified deposited weld thickness when multiple welder qualifications have been done through a single test coupon<\/a>, in accordance with Section IX. Do leave your observation in the comments section below.<\/p>\n","protected":false},"excerpt":{"rendered":"This article touches upon the the subject of qualified deposited weld thickness for a welder qualified in accordance with ASME Section IX. Consider the following problem asked in Interpretation IX-10-23. A welder was qualified on a groove weld test coupon of 10 mm thickness. The welder deposited 2.5 mm thickness of the groove using E6010 … Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":true,"template":"","format":"standard","meta":{"footnotes":""},"categories":[117],"tags":[118],"yoast_head":"\nPractice Case - 1: Deposited Weld Thickness For Welder Qualification<\/title>\n \n \n \n \n \n \n \n \n \n \n \n \n \n \n \n\t \n\t \n\t \n