Question: Design of the overflow tube
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When performing chemical engineering design, it is generally necessary to install an overflow pipe on the metering tank to prevent the liquid in the tank from reaching a level that could cause the container to burst. I would like to ask everyone: what are the regulations regarding the design of overflow pipes? Are there any standards or guidelines that can be referenced? Thank you!
I haven’t seen any specific regulations regarding the design of the overflow pipe. In my opinion, it should be installed a few centimeters to ten centimeters above the desired liquid level, and then adjusted to that level
I think when designing the overflow pipe, it should also be ensured that its diameter is one size larger than that of the feed pipe.
To protect the equipment, the overflow pipe must be thicker than the feed pipe to ensure that the liquid entering can be discharged immediately
The overflow pipe just needs to be no smaller than the feed pipe; the specific requirements depend on the process conditions!
What is the practical purpose of designing the overflow pipe to be so thick? The possibility of overflow occurring is not very high; factories have strict requirements for level monitoring, with both on-site level gauges and centralized control systems in place. Moreover, it’s not just the overflow pipe used for draining liquid – you also need to consider how to secure that pipe, as well as where to direct the liquid that overflows. I’m not sure if my explanation is clear enough ? :)
The overflow pipe just needs to be one size larger than the feed pipe. At the same time, it is also necessary to consider whether the overflow pipe can overflow through gravity flow.
The position of the overflow pipe in the metering tank must be such that the volume of the tank below the overflow pipe corresponds exactly to the volume required by the process. Additionally, the overflow pipe should be slightly thicker than the feed pipe. The overflow pipe is not intended to prevent the storage tank from bursting, as the metering tank also has a drain and will not burst. Also, does the overflow pipe return to the feed tank or not?
Generally, when designing in our institute, the overflow pipe is one size larger than the feed pipe.