Bolted flange joint
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This post was last edited by Kindergarten Question Too Difficult on 2019-4-25 08:40. As shown in the picture, the flange is welded to the outer cylinder for fixation, and the inner hole is welded to the ultra-thin cylinder. The ultra-thin cylinder bears liquid pressure, and the thickness of the cylinder is 0.6mm. It is supported and strengthened by the outer structure of the cylinder. Does this connection method belong to any flange in GB150.3 2011?
In addition, when using the finite element method to check bolted flange joints, should we refer to the bolt pretightening force calculated by the waters method? However, the design bolt load calculated by this method is much smaller than the actual installed bolt load. So, does the design bolt load calculated by the waters method still have reference value? When using the finite element method to check bolted flange joints: 1. Use the waters method to select the total cross-sectional area of the bolts and determine the number and size of the bolts. ； 2. Select a certain percentage of the yield strength of the bolt material as the bolt stress required for installation, and multiply it by the cross-sectional area of the bolt to obtain the pre-tightening load of the bolt. ； 3. Through the finite element results, continuously adjust the bolt pretightening force until the strength conditions and sealing requirements are met. If there is any inaccuracy or error in my understanding, I welcome criticism and correction.