Issue with the external reinforcement ring at the saddle of horizontal containers
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This post was last edited by Zhan Yao Chu Mo on 2018-11-21 at 14:05. As shown in the figure: The note at the bottom of page 91 of the standards for horizontal containers states that the reinforcement ring being located within the saddle plane means it is situated at a distance of less than or equal to b2/2 on each side of the saddle plane. So now the problem arises: due to structural constraints, it is not possible to install reinforcement rings inside the cylinder. When the reinforcement rings are placed on the outside, and the equipment has a large diameter, both the width of the cushion plates and the width of the stiffening plates become considerable. If one tries to avoid these cushion plates, the center line of the reinforcement rings will no longer lie within the plane of the saddle. If avoidance is not possible, the reinforcement ring can only be placed outside the corner where the pad plates meet. For example, a 150-degree saddle has a gasket wrap angle of 162 degrees. So, the reinforcing ring can only cover a circumference that is slightly larger than 1/2. I’ve seen a few drawings before, and that’s how their reinforcement rings are made. However, doing this leaves areas that are not covered by the reinforcement rings, and they are also areas under significant stress. So I think the reinforcing ring should be the entire ring. Some people also believe that the structure of the saddle itself can serve as a reinforcing ring, so it is not necessary to use a full-ring reinforcing ring. Is this design reasonable? How did everyone handle it? Feel free to point out any issues in the discussion! https://attach01.hcbbs.com/forum/201307/08/222403k5tsvvgv3j3i3w4f.jpg
@Dou Wan, it seems like you’ve encountered similar problems as well. How was it solved?
This post was last edited by jizhanwei22 on 2018-11-21 at 15:18. My usual approach is as follows: 1. When the reinforcement rings are placed inside the cylinder, they should be positioned within the \"saddle plane\" as much as possible; when there aren’t enough reinforcement rings, the remaining ones are placed in planes other than the saddle plane. 2. When the reinforcing ring is placed outside the cylinder, try to avoid installing the entire ring of reinforcing rings around the saddle. 3. When the reinforcing ring is placed outside the cylinder, and it is necessary to install an external reinforcing ring within the saddle plane, a partition reinforcing ring shall be installed in accordance with the requirements of GB150.3, and the saddle web shall also be considered as part of the external reinforcing ring.
https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1542797140164&di=1b83109741dbd1f65c86de819006edc3&imgtype=0&src=http%3A%2F%2Fwww.gygd.cn%2FArticle%2FUploadFiles%2F201702%2F2017022817315293.png The reinforcement ring outside the saddle plane; as shown in the image, it seems impossible to disconnect it – it ends at the pad.
As shown in the figure, a colleague believes that the saddle can be approximated as an I-beam reinforcement ring, so there is no need to install an additional reinforcement ring at the saddle area. The saddle can be used as a substitute; for the circumference not covered by the pad, a reinforcing ring can be installed.
Give me the specific dimensions, I’ll take a look and do the calculations
Cylinder diameter: 3200 mm; thickness: 12 mm; length: 11000 mm. Material: Q235B. Pressure: 0.1; temperature: 100. Elliptical end cap dimensions: 12 (10.6) mm; material: Q235B. There are 3 saddles, with a wrap angle of 150 degrees. The left saddle is located 1400 mm from the tangent line, while the other two saddles are each located 4100 mm from the tangent line.
What is the reaction force at the support? Has the saddle size been determined?
150-degree standard saddle. The support reaction force is the equipment’s own weight plus the weight of the alkaline solution contained within it. Density 1900.
An external reinforcement ring can be placed next to the saddle.