How to inspect the weld joint between the skirt and the housing
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For vertical vessels supported by a skirt, magnetic particle testing is required for the welds connecting the skirt to the shell. Is ultrasonic testing also necessary?
There are no standard requirements for conducting ultrasound examinations; the organization can decide based on its own circumstances and capabilities.
I’ve never seen any requirement for ultrasound testing.
During the design process, the owner’s \"Uniform Provisions for Design Techniques\" stipulated that for other pressure-bearing welds on the container sections where 100% non-destructive testing is required for the joints, ultrasonic testing should be carried out using longitudinal or transverse waves on the welds of the skirt； It is also required that magnetic particle testing be conducted on the welds connecting the skirt base to the shell after post-weld heat treatment. We argue that this welding standard does not specify the need for ultrasonic testing, and that such testing is difficult to carry out and therefore impossible to implement
Ultrasonic testing is not required; magnetic particle or penetrant testing is sufficient. The specific requirements and details are outlined in Chapter 6 of HG 20652
Only magnetic particle or penetrant testing is required; ultrasound testing is not necessary.
Ultrasound can be skipped; magnetic particle testing will suffice
It’s a unified regulation set by the General Institute, right? We have also encountered some unreasonable requirements set by the headquarters; in such cases, it’s best to negotiate with the headquarters, and if negotiations fail, simply ignore them.
Magnetic particle testing can be performed, in accordance with the HG20652 standard. In special cases, those that use docking can be considered related to ultrasound, but they are rarely used