How to calculate the opening reinforcement for non-radial connections
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Generally, the opening reinforcement for non-radial nozzles can be calculated using HG20582-1998; however, it requires that the ratio of the major to minor axis of the elliptical opening formed where the nozzle and the shell or head meet due to the non-radial connection should not exceed 2.0. There are many non-radial pipes that fall outside this range, especially those tangential openings in cyclone separators; how should the reinforcement for such openings be calculated? What criteria should be used for hole reinforcement calculations? Or are there any similar empirical formulas or something? Thank you for your help
Previously, I used the major axis of the intersection line (ellipse) as the diameter of the pipe for performing hole-strengthening calculations. I’m not sure if this is appropriate, but it seems to work fine.
What’s the point? Whether it’s radial or non-radial, the preferred method is the equal-area approach specified in GB150; if that doesn’t work, then the pressure-area method from HG20582 can be used, and as a last resort, finite element stress analysis is necessary.
When going beyond conventional design methods, analytical design is the only option.
Then why is it necessary to calculate two cross-sections, while GB150 only requires the calculation of one cross-section?
How exactly is opening reinforcement calculated for non-radial nozzles?
FEA analysis is carried out using the Ansys software; in accordance with the requirements specified in standard JJB4732-1995, I can help you with the calculations, but it will incur a fee