How should a container with large holes be reinforced?
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There is a tapered container with an inner diameter of 800 at one end and 850 at the other; its height is 1200, and the wall thickness is 12 mm. A hole with a diameter of 730 has been made in the middle of the side surface for a welding pipe. How should this area be reinforced?
Calculate according to HG20582-1998
Reply 2# jeej2005: The applicable range for large openings as specified in HG20582-1998 seems to be that the ratio d/D should be less than or equal to 0.8. The value in the original question exceeds this limit; I have never encountered such a case before, so I don’t know how to approach it! ! ! Owner, please tell us about the pressure, temperature, and other relevant characteristics of your device, so that everyone can help you solve the problem ； If it is under pressure, you can use the component calculations in SW6 ； Calculate it based on three connections to see if it’s possible; this is for reference only! !
Such holes cannot be created, as they are too large and manufacturers are unable to produce them; unless tubes that can be pulled out, similar to tees, are used, but those would require extremely thick walls.
At a temperature of 80 degrees and a pressure of 0.3 MPa, the wall thickness should be around 4-5 mm if calculated based on a tee shape; however, I’m not entirely sure about this. The medium contains acidic gases, and rubber will eventually be used as a lining
Press the three-way valve? Are there calculations for tees with reduced and enlarged diameter connections? Haven’t seen it. There is also the stress analysis method that can be used.
Stress analysis using the limit load method
There’s no such three-way fitting, I guess the domestic standards should follow the stress analysis method, but it’s possible to refer to foreign standards as well
After the upgrade of HG20582, it’s not clear whether this aspect will be affected; I heard that many additional calculations have been added
Is that true? Where did you hear it? ? Is there a draft for discussion~»