Question: Applications of container plates in different thickness ranges

As a supplement: materials such as Q345R and Q245R

The thickness of the steel plates used in pressure vessels is determined primarily based on strength calculations. The material grade is selected based on the type of medium and operating conditions.

We look at drawings; we are a manufacturing company. Processing is mainly based on the customer’s drawings. It’s hard to say what components are suitable for which specifications

Your question isn’t very specific. You could ask more precisely, for example, whether a thickness of 65 mm is suitable for use in tube sheets made of Q345R. This will make it easier for others to answer. The thickness is determined through calculations. When selecting a material, the medium involved must be taken into account first, followed by temperature and pressure. Once the basic requirements of the client are met, factors related to manufacturing capabilities, such as weldability and the difficulty of processing, also need to be considered. The choice should be based on actual conditions. For instance, if your facility’s rolling machine can only handle plates with a thickness of 30 mm, and the calculated thickness using Q245R is 36 mm, then you might consider using Q345R to reduce the thickness (provided that it still meets the requirements regarding the medium and other design criteria)

This is the thickness sequence for regular steel plates (equivalent to the pipe diameter sequence), which has been established based on experience from the frequent use of specific products in practice. The sheet thicknesses of generally designed container products fall within this range, and sheet metal manufacturers also produce steel plates of thicknesses in this range for customers to choose from, in order to avoid waste. This is also a trend toward standardized manufacturing in society.

The question is quite strange; I’m not clear about your intention, I don’t know exactly what you want to ask, nor do I know how to answer it

Thank you for your advice. I work in the supply of container plates; I’ve been in this business for a few years and manage to sell a large quantity each year. However, I only know that these plates are used for making storage tanks, but I’m not aware of the specific thicknesses and their applications. For example, what are 6/8/10 mm thick plates used for – for making rolls or something else? And what about plates with a thickness of 60-80 mm – are they used for making tube sheets or another purpose? I’m asking this out of curiosity, as well as to gain a better understanding of the product and to serve customers better. :I earnestly request your guidance!

I guess the reason the original poster asked this is because they saw the table of allowable stresses for the materials, right? This thickness has no direct relation to the purpose for which the container is intended; for example, when creating container shells, 6 mm may be sufficient in some cases, while high-pressure containers may require a thickness of over 100 mm. The thickness is determined based on the size of the container and the pressure it must withstand. As for why there are separate thickness categories specified at 150 mm, it is because materials of different thicknesses require different stress levels at various temperatures. For instance, in the case of thick-walled cylinders made by rolling, the properties of thick plates are far inferior to those of thin plates, with significant differences in their ductility and toughness both in the axial and perpendicular directions. Additionally, the effects of heat treatment on these materials also vary; it’s easy to see that heat treatment yields better results with thin plates. Another factor is that different thicknesses of plates have varying requirements regarding impact tests and similar evaluations.

Container plates are not classified by thickness to determine their applicable scenarios; the new 150 standard merely specifies limitations regarding the service conditions, allowable stresses, design temperatures, etc., of these materials