How is the pressure of a spherical tank determined?
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The blueprint for the 650 m3 chloromethane sphere tank specifies an operating temperature of 40°C and an operating pressure of 0.65 MPa (G). During the hot summer months, venting occurs frequently. If the pressure is increased to a higher level, such as 0.8–0.85 MPa (G), would venting under such conditions be considered overpressure? Are there no legal regulations? Are there any regulations regarding whether pressure vessels are allowed to have an actual operating pressure that is lower than the design pressure but slightly higher than the specified working pressure? Thank you!
It must be used in accordance with the operating conditions specified in the original design; overpressure use is not permitted. If temperature reduction is required, spraying and other cooling methods can be employed; remember not to operate the equipment beyond its capacity or under excessive pressure due to production needs. “\"Safe production\" must be given top priority.
Thank you. Due to the high temperatures in summer, the temperature of chloromethane can reach nearly 40°C. According to available data, the saturated vapor pressure is 0.85 MPa (A); is setting it at 0.65 MPa too low? Should the operating pressure be a range?
The test pressure for spherical tanks has its specific requirements. As for your use, you must comply with the requirements specified in the terms of use. If it proves unsuitable in production, that is a design issue; as operators or equipment managers, it is our duty to abide by the rules.
When pressure vessels are used at pressures exceeding their rated value by more than 30%, coupled with frequent stress-induced deformation during venting, their lifespan is reduced