Is 100% testing required for the welds of heads that are first joined together by panels and then formed, according to GB/T150.4? The General Administration replied in this way.
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Question: In 10.3.2 of GB/T150.4-2024, it is stated that “the following areas a) to e) and weld intersections shall be inspected 100%; the inspection lengths for areas a), b), c) and weld intersections can be included in the local inspection length.” a) All joint connections on the head, cylinder, and cone sections that are formed after plate assembly. As a designer, my understanding is that 100% flaw detection is required for all types of welds, namely A, B, C, D, and E, on the cylinder formed by coiling sheet metal. Is this correct? If not, I would be very grateful if you could provide an explanation. Answer: This specification requires that jointing at the head, cylinder, and cone sections be subjected to 100% radiographic or ultrasonic testing after panel assembly and shaping; welded joints formed thereafter are not included.
In accordance with the requirements of GB/T150.4-2024, all joint seams on heads, cylinders, and cone sections that are formed after panel assembly must undergo 100% radiographic or ultrasonic testing; however, this does not include the joints that are welded after shaping. .
How did the butt joint come about?
No seam detection? What are you thinking?
The same requirement applies to seam B; do you really expect to create an entire CDE seam as well?