The elliptical head is welded to the cylinder, with the wall thickness of the head being greater than that of the cylinder; thinning of the head is used as a solution. Are the welding joint diagrams and the methods for thinning the edge shown below feasible?
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The elliptical head is welded to the cylinder, with the wall thickness of the head being greater than that of the cylinder; thinning of the head is employed for this purpose. Figure 1 shows the welding joint details, while Figure 2 illustrates the groove and bevel design for the elliptical head. Can these designs be used? Additionally, do Figures 1 and 2 conform to the structural form of Figure b in D2.2 of Appendix D of GBT150.3-2024? Figure 1 Figure 2 Structure in Appendix D of GB/T150.3
Do Figures 1 and 2 conform to the structural format of Figure b in D2.2 of Appendix D of GBT150.3-2024? ————Look at your node; it’s not a structure
Secondly, 30 mm does not refer to the center of the weld, but rather from the starting point of edge trimming to the welding edge; one can refer to the diagrams in the standards for details – visual estimation alone is not sufficient for 30 mm
This is closer to the standard requirements; it is recommended to carry out actual drafting to see the actual values of each dimension
Compared to D2.2b, it does not meet the standards. The starting point for trimming should be at the tangent point.
The poster should check whether the thickness of the head after edge trimming is greater than the minimum thickness of the head after it has been formed. If it is, then edge trimming is possible; otherwise, it should not be done casually. Cladding can be used to transition to the cylinder section, with a slope of 1:3 or 1:4 to 1:5, which can also help address the stress concentration caused by sudden shape changes.
The minimum thickness requirement for this end cap is 31.7; is it okay if you reduce it to 28?