Working pressure of pressure vessel
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Can the working pressure of a pressure vessel be adjusted? For example, if the design pressure is 1.6 MPa and the original operating pressure is 0.3 MPa, is it possible to change it to 0.4 MPa?
You can consult the design institute; generally, the design pressure = 1.5 × operating pressure. However, it is necessary to take into account the properties of the material and ensure compatibility with the temperature.
The operating pressure of the pressure vessel can be adjusted as needed. Within the design pressure range, changes are generally possible. For example, it is generally possible to change a pressure vessel designed for a pressure of 1.6 MPa, which originally operates at a pressure of 0.3 MPa, to an operating pressure of 0.4 MPa. However, any changes to the working pressure must be evaluated and confirmed by professionals to ensure safety and reliability, while complying with relevant regulations and standard requirements. Any changes to pressure vessels must undergo strict review and control to ensure the safety of the equipment and personnel. Be sure to consult a professional engineer or the relevant regulatory authorities to ensure that the operations comply with applicable laws and regulations. .
To increase the working pressure, it is necessary for the original design agency to provide calculations and relevant documents
The working pressure is relatively stable, and some conditions involve various operating scenarios; in any case, it is necessary to ensure that during fluctuations in operation the pressure does not exceed the pressure level set by the safety devices, let alone exceed the design pressure or the maximum operating pressure.
There should be no problem, but it is necessary to verify whether the safety valve meets the requirements.
The operating pressure cannot be adjusted; it is sufficient to ensure that the applied pressure does not exceed the operating pressure.
Yes, but only if you understand the definitions of each type of stress.
There should be no problem, but it’s necessary to go through the process with the design unit. The working pressure increases, which is equivalent to changing the operating parameters of the pressure vessel. According to clause 5.2.1 of TSG21-2016, “Pressure vessel modification refers to changing the structure of the main pressure-bearing components or altering the operating parameters of the pressure vessel.” Modifications to pressure vessels must be carried out in accordance with Chapter 5 of TSG21; the design unit needs to issue a change order or a diagram showing the modifications to be made. In fact, all that needs to be changed in the drawings is the working pressure parameter
It’s not that simple. You say it’s been modified, but for the design team to do that, it’s not just a matter of issuing a design change; a complete set of calculation sheets and design documents are required. Additionally, notification and supervision are needed. Only in such cases can equipment with low value be replaced. Also, the work pressure he mentioned might just be operational pressure; in reality it is likely not greater than the actual work pressure, and such adjustments to the process parameters are entirely acceptable.