Dear seniors, can the nominal diameter of horizontal containers be set at 10 mm?
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I would like to ask the experienced colleagues: for a horizontal vessel, the design pressure is 0.65 MPa and the design temperature is 310°C. Nominal diameter 2800mm. Can the plate thickness be set to 10mm?
What is your calculation? What is the material used? The strength varies depending on the material. Has corrosion margin been calculated? Has negative deviation been considered? Also, the coefficients vary for different media
Senior, the material is Q345R; the corrosion allowance is 1.6 mm, with a negative deviation of 0.3 mm for the steel plate. The medium involved is water and steam. The coefficient for the shell is 0.85, while that for the head is 1.0. The nominal thickness calculated using SW6 is 10 mm. Calculate thickness: 7.11 mm
I don’t know how to do the specific calculations; it’s correct to use 150 as a value. Also, the medium matters, as different media have different coefficients. When doing a preliminary design, professional engineers should be involved to review it
Based on this data, a quick calculation suggests that there will be problems with σ6 in terms of seat calculations
Based on your data, it’s fine to use a nominal wall thickness of 10 for the cylinder
However, the thickness of horizontal equipment needs to be calculated together with the saddle, as the position of the saddle may require an increased wall thickness or the inclusion of reinforcing structures
As long as it meets the requirements when calculated for a horizontal container, that will be sufficient; if you’re concerned, you can install reinforcing rings outside if possible.
Pressure vessels are hazardous products; one must have a thorough understanding of the relevant knowledge in order to design them. It’s not sufficient to simply ask for some data. If there are issues with the structural design, it can lead to safety accidents that cause significant harm to society, and those responsible will be held accountable – the consequences are severe.
Hello, senior. A reverse T-shaped reinforcement ring with specifications of 150×12 has been installed inside the equipment; the saddle used meets the standards specified in NB/T47065, and it has been verified as compliant through SW6 calculations. Based on a design pressure of 0.65 MPa and a design temperature of 310°C, a shell thickness of 10 mm is selected; the head and cylinder calculated using SW6 are also satisfactory. The calculated thickness is 7.11, with a corrosion allowance of 1.6 and a negative deviation of 0.3 for the steel plate; the nominal thickness after rounding is 10 mm. Since the diameter of 2800 is relatively large, under normal circumstances we would make it 12 mm thick, but for this device, due to some other reasons, a thickness of 10 mm is required. I’m not sure what to do.