Pressure vessels at normal temperature and pressure
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I’m seeking advice from experts: for containers operating under normal temperature and pressure conditions, what values should be used for the design pressure and design temperature? The working pressure is atmospheric pressure. Is it possible to undergo supervision and inspection for pressure vessel design?
For containers operating under normal temperature and pressure conditions, the design pressure can generally be set at atmospheric pressure, that is, 1 atmosphere (approximately 101.325 kPa), and the design temperature can be set at normal temperature, that is, within the range of typical ambient temperatures. Since the working pressure is at atmospheric pressure, it is possible to proceed with solid-volume planning-related inspections. .
With working pressure at atmospheric pressure, it certainly falls outside the scope of inspection under fixed-volume regulations.
1. Pressure vessels with operating pressure at atmospheric pressure are not covered by the \"Safety Technical Inspection Regulations for Fixed Pressure Vessels\". 2. Vessels covered by the \"Regulations on Safety Technical Inspection of Fixed Pressure Vessels\" must meet the following conditions simultaneously: (1) The operating pressure is greater than or equal to 0.1 MPa ； (2) Volume greater than or equal to 0.03 m3 and inner diameter greater than or equal to 150 mm ； (3) The medium contained is a gas, a liquefied gas, or a liquid whose maximum operating temperature is higher than or equal to its standard boiling point. 3. The determination of the design pressure and design temperature is carried out in accordance with 4.3.3 and 4.3.4 of GB150.1 in GB150.1~150.4-2011 \"Pressure Vessels\".
1. Pressure vessels with operating pressure at atmospheric pressure are not covered by the \"Safety Technical Inspection Regulations for Fixed Pressure Vessels\". 2. Vessels covered by the \"Regulations on Safety Technical Inspection of Fixed Pressure Vessels\" must meet the following conditions simultaneously: (1) The operating pressure is greater than or equal to 0.1 MPa ； (2) Volume greater than or equal to 0.03 m3 and inner diameter greater than or equal to 150 mm ； (3) The medium contained is a gas, a liquefied gas, or a liquid whose maximum operating temperature is higher than or equal to its standard boiling point. 3. The determination of the design pressure and design temperature is carried out in accordance with 4.3.3 and 4.3.4 of GB150.1 in GB150.1~150.4-2011 \"Pressure Vessels\".
This post was last edited by wanlirn on 2023-7-13 09:32. For containers under normal temperature and pressure, the design pressure is set at 0.02 MPa according to industry practices, with a design temperature of 50 degrees; 30 years ago it was 20 degrees. Many people ask why it is 0.02 MPa; I can’t explain it either. For decades, design institutes around the world, including our company, have used this value, so I would say it’s a matter of convention. Stop arguing. .
When calculating the thickness for the design of pressure vessels at atmospheric pressure, temperature and pressure should be taken into account
1. For the design pressure and design temperature of atmospheric-pressure vessels, please refer to NB/T 47003.1—2009； 2. Pressure vessels at normal pressure are not regulated by the Pressure Vessel Regulations.
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