Questions regarding the conical shell reinforcement ring
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Now, one piece of equipment with a conical shell as its head. The design pressure is negative; three reinforcement rings are used on the cylinder, each positioned 100 mm away from the cylinder’s weld line. Does this constitute the use of reinforcement rings at the larger end of the conical shell? (When performing SW6 calculations, if a reinforcement ring is not considered at the larger end of the conical shell, such a transition section needs to be very thick.) Does a reinforcement ring have to be installed on the conical shell in order to be considered a reinforcement ring at the large end of the conical shell? Could someone give me some advice? I believe that as long as the reinforcement ring is within the range specified in GB150P63 for the cone shell and cylinder, it is considered to be a reinforcement ring installed at the cone shell.
Based on what was mentioned above, my personal opinion is as follows: 1. The reinforcement rings are generally not welded to the conical shell; they are mostly welded to the cylinder (near the weld line where the cylinder meets the conical shell). Therefore, the reinforcing ring in the attachment can be considered as a reinforcing ring installed at the larger end of the conical shell. 2. At this point, for the reinforcement calculation of the large end of the conical shell, it is first necessary to determine whether reinforcement is required at the junction between the large end of the conical shell and the cylindrical shell (this is determined based on the calculated Δ value). When it is necessary to strengthen the design: calculate according to GB150. It is worth noting that when calculating the combined moment of inertia, the moments of inertia at point 3 need to be taken into account for combination; namely: ①. The cross-sectional area of the cylindrical portion used for reinforcement. ②. The conical shell section is used for the reinforced cross-sectional area. ③. Cross-sectional area of the reinforcement ring selected for design. Additionally, the original poster’s view that \"I believe a reinforcement ring is sufficient as long as it is within the range specified in GB150P63 for the cone shell and the cylinder\" is correct.