Can Q235B be used for pressure-bearing components of pressure vessels?
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Can Q235B be used for pressure-bearing components of pressure vessels?
It can still be used at present, but there are restrictions regarding thickness and temperature, as specified in GB150! ! But it seems that Q235-B has been removed from the draft of the new version of GB150! ! But the new version of GB150 hasn’t been released yet, so it can still be used! ! Can devices that are not inspected in the future still be used? I’m not too sure about this either!
The use of Q235 is not recommended at present!
It should still work, I guess. . I saw that it’s being used in our company, so I asked them. It seems our teacher mentioned that the new national standards state it shouldn’t be used, but they said it can still be used since those standards haven’t been released yet. .
It can be used; it’s explained in the new Appendix 150. At least I think it can be applied to pressure vessels
The sulfur and phosphorus contents of Q235B exceed the limits specified in the new regulations, so it cannot be used for classification purposes. There is no indication that containers without a pressure rating cannot be used, so we still use Q235B for both atmospheric-pressure and externally pressurized containers.
I don’t understand what the person above said. The section on materials in GB150 specifies the applicable range of Q235B carbon steel, which means it can be used in pressure vessels within that range. Furthermore, the 2009 version of the code does not state that Q235B material cannot be used for the main pressure-bearing components of pressure vessels.
Reply to 7# zlcyx: The new regulatory standards specify that for pressure vessels made of carbon steel, the sulfur and phosphorus content should be at most 0.020% and 0.030% respectively; Q235B generally does not meet these requirements, so this material should not be used for such applications
It’s also possible to use it; just specify the SP content separately. For stress resistance, it’s best to use Q245R
It can be used; I’ve seen that Q235-B is often used in the design of five-ring structures
According to GB150, it can be used in pressure-bearing equipment, but the requirements regarding the P and S contents must be specified in the technical specifications. Currently, for some of our company’s sheets, this is the approach taken when the contents specified in the standards do not meet the requirements of the new regulations.