Selection of cylinder material for general equipment
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I would like to ask everyone: What material is generally used for the cylinders of equipment under normal pressure, and can 20R be used to manufacture such cylinders?
For equipment operating at atmospheric pressure, the material used is important; for certain corrosive environments, corrosion-resistant steel should be selected.
For equipment operating at atmospheric pressure, Q235-B is generally used; only in the case of low-pressure equipment where rigidity is a critical requirement is 20R employed. However, using 20R for atmospheric-pressure applications is definitely fine as well. That said, the above information applies only to ordinary media – I’m not sure what kind of medium is used in the poster’s equipment
For equipment operating at normal or low pressure, Q235-B is sufficient
If the requirements can be met, Q235-B, Q235-C, 20R, 16MnR, etc. should be selected in order.
Whether it is a device at atmospheric pressure or under pressure, the choice of material depends mainly on the medium contained within the device, the operating temperature, and the budget available It can’t be generally said that carbon steel materials will do!
Agree with that statement. I don’t understand what the purpose of LZ asking this is?
It’s best to explain the situation more clearly; the choice of material is generally closely related to the medium involved. If carbon steel can be used, then for pressure vessels at normal pressure, Q235-B is usually sufficient.
The choice of material is mainly related to the medium and operating conditions, right?
Once the pressure is determined, the material is naturally mainly determined by the medium and operating conditions; carbon steel is chosen first as long as it meets the requirements, that is, considering cost efficiency
Once the pressure is determined, the material is naturally mainly determined by the medium and operating conditions; carbon steel is chosen first as long as it meets the requirements, that is, considering cost efficiency
I fully agree with the views expressed by everyone above; they are absolutely correct. But could some other friend explain in more detail which standards we should use to select those materials of Q235B and C that exceed the 150 threshold?
In the case of corrosive media, the key factor is the compatibility between the selected material and the corrosive medium. If only strength is considered, using 20R is no problem.
Depending on the working pressure, Q235-A is sufficient for normal pressure conditions; in our company, we generally use Q235-B for low-pressure equipment
Large storage tanks use 20R and 16MnR; when the thickness is greater, 20R and 16MnR are still used
It can be used as a cylinder; for medium and low pressures, Q235B-20R (20g)-16MnR is generally used
Personally, I think Q235-B will work as well; its usability and cost-effectiveness need to be taken into consideration. It is mainly determined by referring to the standards.
When selecting materials for pressure vessels at normal pressure, it is primarily necessary to consider the properties of the medium contained within the equipment; factors such as operating temperature also need to be taken into account. 20R steel plate can be used to manufacture vessel shells, and it is mainly employed in applications where strength is a key consideration. In general, when choosing materials for equipment, it is first necessary to meet the basic requirements of production (pressure, temperature, properties of the medium, etc.), and then economic feasibility should be considered, which will allow for a proper judgment to be made.
It’s fine to use it; for pressure vessels at normal pressure, Q235-A is also acceptable, while Q235-B is somewhat of a waste.
At normal pressure, our company generally uses Q235-B for low-pressure equipment; for normal pressure, we use Q235-A
20R is perfectly feasible in principle, but the choice of material for the equipment cylinder is related to factors such as the medium, operating temperature, and degree of corrosion.