Questions regarding non-destructive testing of the weld joints on pressure vessels of categories C, D, and E
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In GB150.4, only Clause 10.4 specifies that surface non-destructive testing is required for C, D, and E class welds on certain special pressure vessels. However, in our daily design work, surface non-destructive testing is required for C, D, and E class welds on all pressure vessels; for example, the welds between the vessel’s support plates and the shell (no relevant standard requires surface non-destructive testing for such welds). May I ask where else it is specified that non-destructive testing of the surfaces of these C, D, and E class welded joints is required? Is it decided by the designer themselves? Please explain, experts
According to the provisions of standard GB150.4, only clause 10.4 requires surface non-destructive testing for the C, D, and E class weldments of certain special pressure vessels. However, in everyday design, requiring surface non-destructive testing of all C, D, and E class weld joints in pressure vessels may be a design decision of its own, rather than a requirement explicitly stipulated by standards. In fact, depending on the specific conditions of the pressure vessel and the requirements of its operating environment, design decisions may be made to conduct surface non-destructive testing on the weld joints in order to ensure welding quality and safety. Designers can refer to other relevant standards or industry guidelines, such as ASME (American Society of Mechanical Engineers), to guide the requirements for surface non-destructive testing during the design process. In summary, whether to conduct surface non-destructive testing on weld joints of categories C, D, and E in the design process may need to be determined based on specific circumstances and design requirements; other relevant standards or industry guidelines can be referred to for guidance. .
Thanks for the explanation, big bro; I get it now