In the calculation of externally pressurized cylinders, it is required to input half of the sum of the calculated lengths of the cylinders on either side of that reinforcement ring”
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When performing the SW6-2011 calculations, it is required to enter the \"calculation length L of the outer pressure cylinder\"; when setting up reinforcement rings, it is necessary to enter half of the sum of the calculation lengths of the cylinders on either side of that reinforcement ring. Taking a vertical vessel as an example: if reinforcement rings are installed, whether there is one or two such rings, the \"calculation length L for external pressure\" takes the maximum value of L; this value includes \"1. the distance between the reinforcement ring and the upper head\" ； 2. Distance between reinforcement ring and lower head ； 3. Increase the ring spacing”. If a reinforcement ring is used, whether there is one or two such rings, the value \"half the sum of the calculated lengths of the cylinders on either side of the reinforcement ring\" takes the maximum value of (L+L)/2, where the value of L includes \"half the sum of the distance L between the reinforcement ring and the upper head and the distance L below the reinforcement ring\" ； 2. Half the sum of the spacing L on the reinforcement ring and the spacing L between this reinforcement ring and the lower head ； 3. Half the sum of the spacing L on the reinforcement ring and the spacing L below it”. May I ask the seniors, is that the case?
L1+L2 plus half, that is, the average length
For the external pressure calculation, the maximum value among L1-3 is used; when calculating the reinforcement ring, the larger of (L1+L2)/2 and (L2+L3)/2 is taken.