SW6 flange calculation
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For the flange calculation in SW6, when determining the axial stress on the flange, it is required that the calculated value be less than 1.5 times the allowable stress of the flange material or 2.5 times the allowable stress of the cylinder material (the lower of these two values). However, in the final calculation results, it is required to use 1.5 times the allowable stress of the cylinder material； Is it a software bug or is there some other reason? file:///C:/Users/1503/AppData/Local/Temp/msohtmlclip1/01/clip_image002.png 221.85 MPa; file:///C:/Users/1503/AppData/Local/Temp/msohtmlclip1/01/clip_image004.png =271.5, or file:///C:/Users/1503/AppData/Local/Temp/msohtmlclip1/01/clip_image006.png =369.4. (For any type of flange designed as part of an overall flange assembly, use file:///C:/Users/1503/AppData/Local/Temp/msohtmlclip1/01/clip_image008.png.)
Yours is smaller than both of them, so of course it fails.
If the calculated value is lower than the allowable value, how can it be considered unacceptable? What I mean is (how the allowable value should be determined). Take the minimum of 1.5Qf and 2.5Qn, but it is noted later that 1.5Qn should be used ； Contradictory）
SORRY, I looked at it the wrong way; he had already calculated 1.5, so he noted that 1.5 should be used.
I get it now. . When an arbitrary flange is calculated as a integral flange, the value should be taken as 1.5Qn. .
The required value is 221.64; it’s just a little short
I’ve encountered this too; it seems that the software calculations are correct, but there’s an issue with the calculation report. This is for a flange of arbitrary design, calculated based on the overall flange parameters, and the allowable stress should be 1.5 times the design temperature allowable stress for the cylinder.