Opening reinforcement
Thread Content
Today, while going through the documents in the archive, I found a container with a wall thickness of 8 mm; there was also an access hatch on the cylinder, with an outer diameter of 530 X 6 mm. On a whim, I calculated the reinforcement required for that opening and found that no reinforcement was needed, yet a reinforcement ring was still added to it. I know that using reinforcing rings will definitely work, but it still feels strange to me. I’d like to hear the opinions of those who are involved in design.
Container thickness = 8mm, including corrosion margin!
Sometimes it may also be to enhance stiffness. Many atmospheric-pressure vessels also have reinforcing rings at their openings, especially those made by the Japanese devils.
Perhaps the designers took certain factors into account, such as safety
The plate thickness is small; the main concern is deformation resulting from insufficient stiffness of the housing after the openings are made.
What you have calculated is only the strength of the equipment; the issue of its stiffness is not taken into account. Also, it should be determined whether a corrosion margin has been considered in the calculations, as well as what the liquid level in the equipment is. It’s advisable to calculate the stresses as well, as it’s possible that the stresses might be too high. One more point: many designers, for large-opened nozzles, even if the calculations pass, add a plate to them from a safety perspective
Look, he has chosen a wall thickness of 8 mm, which indicates that there is some pressure involved… Generally, although reinforcement isn’t always necessary, when the reinforcement area available for the cylinder and the connectors is quite small, reinforcement is still required