To which category do the spherical head and the welding seam of the floating head flange in a floating head heat exchanger belong?
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Recently, I encountered floating-head heat exchangers, and I found that it’s unclear to which type of weld the spherical head of the floating-head cover and the welding seam of the floating-head flange belong. Moreover, it’s not clear how to calculate the strength of these welds or how to determine their dimensions (Test pressure: 3.2 MPa, working medium: naphtha) Thank you! ! :D
This is a compressed floating head cover; what classification does it fall under as Category D?
What type of weld is it, and what non-destructive testing methods should be used?
Seek algorithm for opening holes at arbitrary points on a head
1. It should be classified as Category C. 2. After checking the GB151 calculations, it seems that the strength of this weld was not verified; the value of the weld penetration depth is only used when calculating the radial force Fr and the torque. The SW6 help guide suggests not entering this value initially, allowing the software to provide a suggested value for further optimization, and that’s exactly what we have been doing.
C-slit; surface inspection can be carried out if necessary.
Hey, I also saw that the 150 welds have been classified; it seems to be Category C welds, but some people say that the weld on the right side of the head is a butt weld. I also saw the flange penetration depth for the SW6 head, but I would like to ask how the weld strength and the dimensions of the weld are calculated? Thank you.
It’s not easy to achieve Rt; is it acceptable to use 100% PT with a grade of II?