SW6 uses 4732 for calculating the tube sheet
Thread Content
As shown in the title and figure, when calculating using 4732, how is the \"total stress at the shell end\" determined in the calculation sheet? This value often doesn’t suffice. What are the main factors that affect it? How to deal with it?
1. To save money, thicken only the specific areas, in accordance with GB151 7.4.6.5. 2. Thicken the cylinder as a whole. 3. Thicken the tube sheet
It is recommended to thicken the tube sheet to 40 mm; please try recalculating
This post was last edited by Xiafeng_OXKS on 2021-1-7 at 10:26. 1. If temperature difference stress is taken into account, the thickness of the cylinder shell should be kept as small as possible; meanwhile, the thickness of the tube sheet should be increased for calculations. If the effect of temperature differences is not considered, the thickness of the locally thickened tube sheet should also be kept as small as possible. 2. When the end is designed to function as a flange, the diameter of the flange bolts should be kept as small as possible, in order to minimize the impact of bolt torque on the end of the housing. I wonder if this understanding is valid
You’re right, but I want to know what the fundamental problem is How is this stress calculated? Formula
I was wondering if the original poster’s issue has been resolved. I also encountered a problem where the stress at the ends of the shell did not meet the required standards; I checked the 151 and 4732 standards but could not find any formulas for checking the stress at those ends. Why is this parameter present in SW6?
The inner and outer diameter sizes of the gasket can be changed, but in some cases it is necessary to alter the inner diameter of the flange. The default inner diameter value for SW6 is the inner diameter of the cylinder; if this value is increased, the flange cross-section decreases, which should result in a lower flange torque and, accordingly, lower stress on the cylinder No matter how much you enter in the calculation sheet, the flange width remains equal to half the difference between the tube sheet diameter and the inner diameter of the cylinder.