Issues with the skirt weld joint coefficient?
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Issues with the skirt weld joint coefficient? In ASME product design, what value should be entered for the skirt shell weld joint coefficient? Some people say to take 1, while others say to take 0.6? I’m confused. ASME VIII UW-12 specifies that the coefficient for compressed butt joints should always be 1. My understanding is that the skirt cylinder is subjected to compressive stress, which is why the value 1 is used. I wonder what other opinions people have? Please forgive my ignorance. There is another question: what components are usually referred to as \"compressed butt joints\" in the standards? Those who know, please let me know; thanks
In my opinion, the welding joint coefficient is applicable to joints of types A, B, C, and D, and these joints are related to compressive elements. Therefore, for non-compressive skirt bases, there is no such thing as a joint coefficient; it is sufficient to ensure that the structure can meet its load-bearing requirements
The butt welds between the skirt sections, although not required to be inspected, should still meet the same requirements as those of the cylinder (such as full penetration). Otherwise, while 10 mm is considered acceptable for the skirt cylinder, taking into account the reduction in weld strength to 8.5 mm, problems arise with the circumferential welds (insufficient tensile and compressive strength). It wasn’t taken into account in the calculation; I think it was considered. In calculations, the weld is considered in the same way as the cylinder. There is no basis for this; it is recommended to add requirements in this regard.
Are there circumferential weld and longitudinal weld coefficients in PV-elite? I don’t know how much to enter?
The butt joint skirt is subjected to compression, while the lap joint skirt is subjected to shear