Working pressure: -0.015 MPa (g). What should the design pressure be?
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Working pressure: -0.015 MPa (g). If the design pressure of the vessel is determined by taking into account the maximum difference between internal and external pressures, then -0.1 MPa (G) should be used as the design pressure. Is this a suitable choice? If a design pressure of -0.1 MPa (G) is adopted, should it be manufactured in accordance with GB150 or as a vessel at atmospheric pressure? How exactly should the design pressure be determined? I’m asking for help from all the experts! ! !
It is recommended to refer to HG/T20580-2011, which explains in detail how to select the design pressure. For the scope of application of atmospheric pressure vessels, please refer to NB/T47003-2009
The design pressure should be -0.1 MPa (G), and it should be manufactured in accordance with GB150.
Are you saying to manufacture in accordance with GB150? Since the work pressure does not fall within the 150 range, could using -0.1 MPA result in a value that is too high?
Could you explain it in more detail? I’m looking into the regulations related to the Ministry of Chemical Industry, but I don’t quite understand it. Containers with a design pressure below 0.1 MPA and a vacuum level below 0.02 MPA are not covered by the 150-range regulations, while containers operating at atmospheric pressure refer to those with a design pressure between -0.02 MPA and 0.1 MPA. How exactly should this be determined?
Could you explain it in more detail? I’m looking into the regulations related to the Ministry of Chemical Industry, but I don’t quite understand it. Containers with a design pressure below 0.1 MPA and a vacuum level below 0.02 MPA are not covered by the 150-range regulations, while containers operating at atmospheric pressure refer to those with a design pressure between -0.02 MPA and 0.1 MPA. How exactly should this be determined?
Could you explain it in more detail? I’m looking into the regulations related to the Ministry of Chemical Industry, but I don’t quite understand it. Containers with a design pressure below 0.1 MPA and a vacuum level below 0.02 MPA are not covered by the 150-range regulations, while containers operating at atmospheric pressure refer to those with a design pressure between -0.02 MPA and 0.1 MPA. How exactly should this be determined?
The operating pressure is -0.015 MPa; for a single-layer container, the pressure difference between the inside and outside is -0.115 MPa, which falls under the scope of GB150: handshake
With a pressure difference of 1.25 times, it is only -0.019 MPa; it belongs to a vessel under normal pressure, so it can be designed and manufactured in accordance with NB/T47003.1-2009