Reinforcement ring selection
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Which type of steel section should be chosen for the stiffening ring calculation of externally pressurized vessels? Is there any specific requirement, or is it sufficient as long as the moment of inertia meets the criteria? Should reinforcement rings be made of eight types of materials or should flat steel be used directly?
The SW6 software includes some common specifications that can be used as a reference; the main purpose of these is to verify the inertial moments. In addition, it is necessary to consider whether the manufacturer can supply the specifications you need. Commonly used flat steel, angle steel, and T-shaped steel are relatively easy to manufacture
What was said upstairs is correct; the workability needs to be taken into consideration. T-shaped steel is not easy to bend, so T-shaped steel rings are usually welded together. I’ve seen designs that use channel steel as reinforcement rings, but such designs are difficult to manufacture
When selecting flat steel, care should be taken to ensure that its height-to-thickness ratio is not too high, otherwise the reinforcement ring risks becoming unstable
Some manufacturers create T-shaped steel by welding two flat strips together. If it is not a fully penetrated weld structure and only fillet welds are used, this does not correspond to the calculated moment of inertia; therefore, the detailed drawings must specify that a fully penetrated weld pattern should be used.
There is indeed such a phenomenon; after all, angle steel is difficult to roll
First, calculate the required moment of inertia, and then select from the steel section property table