The pressure relief valve in high-pressure oxygen pipelines – experts, please assess the risks associated with its use
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Pressure before depressurization: 8.0 MPa, temperature: 20°C; Pressure after depressurization: 0.6 MPa, temperature unknown
Strictly abide by the rules and regulations established by the enterprise, as well as the operating procedures; high pressure is not a problem – the issue is that the flow rate cannot be too high. Typically, designs in this area come with a high safety factor; as long as regulations are followed, they are very safe and can be used with confidence. Just like with oxygen cylinders, they are used after the pressure is reduced to 15.0 MPa, making them very safe.
Flow rate: 2000–3000 cubic meters per hour
There’s no need to worry about this; everything has gone through design reviews. If it’s connected manually without the approval of professionals, it’s better to stay away from it.
Several factors need to be considered regarding the valves in high-pressure oxygen systems: 1. Whether the flow regime is impact-type. 2. Flow rate range 3. Select the valve and internal component materials based on the above conditions; selection is completed in accordance with the specifications, allowing for normal operation. I just don’t know why there’s such a significant reduction in pressure? It is estimated that valve selection will be difficult, as the gas expansion ratio is too high.
Due to subsequent process requirements, new pipelines need to be installed, and I’m not confident about how to operate them
This is a high pressure difference operating condition; the temperature is not high, but the flow velocity at the throttle opening is very high. The possibility of temperature increase arises from friction resulting from the high-speed movement of oxygen and the edges of the valve’s throttling components. The internal parts of the valve must be smooth without any burrs, and thorough degreasing is necessary. For such high pressure difference applications, it is best to use materials that are resistant to pressure
Flow rate is crucial; if it exceeds a certain level, it is necessary to use a higher-quality pipe material. GB16912 provides detailed information on this topic
There should be no issues with the materials chosen for these preliminary designs. This is the first time I’ve encountered such a design, and I lack experience in terms of the speed at which the valve opens or closes, whether an operating angle of a small degree is safe, and the self-regulation features of the valve. I hope to gain insights through the analysis of experts; thank you all for your attention and analysis……