Can Q235-B be used as a storage tank material at -20 degrees?
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Class A and B liquids are highly toxic. Is it okay to use Q235-B steel as a fixed roof storage tank? Are there any regulatory requirements in this regard?
Application scope of Q235-B steel plate: design pressure: Less than 1.6MPa operating temperature: 0～350 degree steel plate thickness: Less than 20mm cannot be used for highly and extremely hazardous media
Absolutely not, the regulations don’t allow it
It seems that the operating medium is not possible, but if it is not highly toxic, such as refined oil, it should be OK. The standard uses the local minimum daily average temperature in winter plus 13℃ as the indicator.
This steel seems to only guarantee the composition but not the strength, so I don’t think it should be possible.
Application scope of Q235-B steel plate: design pressure: Less than or equal to 1.6MPa design temperature: 0~350 degree steel plate is used for shell thickness: Less than or equal to 20mm cannot be used to contain media with toxicity levels I and II. I think using 16MnR should work.
It is recommended that LZ check the relevant provisions of SH3046-92 "Design Specifications for Vertical Cylindrical Steel Welded Storage Tanks for Petrochemical Industry"! In addition, LS what everyone mentioned: “Application scope of Q235-B steel plate: design pressure: Less than or equal to 1.6MPa design temperature: 0~350 degree steel plate is used for shell thickness: Less than or equal to 20mm cannot be used to contain media with toxicity levels I and II (extreme and highly hazardous). ” It belongs to the "Pressure Vessel Safety Technical Supervision Regulations" and the regulations for steel used in pressure vessels do not apply to fixed roof storage tanks! Regarding LZ’s question: It is estimated that Q235-B cannot be used to manufacture storage tanks containing highly hazardous media, because according to the provisions of GB50341-2003 "Design Specifications for Vertical Cylindrical Steel Welded Oil Tanks", the allowable temperature of this material is greater than -20°C, and the maximum allowable plate thickness is 12mm. ； But this standard does not apply to tanks storing extremely and highly hazardous media! For reference!
Is Q235-B still in use? There is no longer a board with this specification in GB713
Q235-B cannot be used as a storage tank material at -20 degrees
Definitely not usable. You can consider using 16MnR, but it is more expensive!
It's best to use 16MnR, we design a lot of them.