The wrap angles for horizontal tank saddles are 120° and 150° – what are the advantages and disadvantages? And the related stress analysis?
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Seeing such a title, I was completely baffled. I would like to ask everyone for advice.
Using a larger wrap angle helps to reduce the axial stress, tangential shear stress, and circumferential stress at the saddle plane. For large-diameter horizontal vessels, due to the high loads they are subjected to, heavy saddle supports with a wrap angle of 150 degrees can be used. Using a saddle with a wrap angle of 150 reduces the circumferential stress by 40% compared to a 120-degree saddle, but the downside is higher material consumption.
May I ask where I can find answers to related questions? Thank you
It is in the “Training Manual for Pressure Vessel Designers”.
Under normal circumstances, saddles with a 120-degree angle should be preferred. For large-diameter thin-walled containers, 150-degree saddles are used when the stress at the edges of the saddle becomes too high or when it is not feasible to use a 120-degree saddle. 150-degree saddles can withstand greater stresses than 120-degree saddles, but they are more expensive; therefore, a comprehensive consideration must be given when making a choice
Mm-hmm, I understand. Thank you so much. Ten characters, ten characters, ten characters, ten characters
Under normal conditions, the saddle wrap angle should not be less than 120°. The standard saddle support uses 120° for the light version and 150° for the heavy version. Using a larger retention and support mechanism helps to reduce the axial, tangential, and circumferential stresses in the seated plane. For large-diameter horizontal vessels, due to the high loads they are subjected to, an envelopment angle of 150° can be selected. For details, see the \"Training Manual for Pressure Vessel Designers\"
It is mainly circumferential instability; used when 120° is not sufficient
I just can’t find where it is Could you give some hints?
In the section on the design of 5-6 horizontal vessels with 4 saddles, choose the option of -(4) saddle wrap angle