Steam pipeline purging flow rate control
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I was wondering that the standards require a purging flow rate of >30 m/s for steam pipes; how do you ensure this value is met during the purging process? Is there any experience available for reference? Thank you!
Take a look at the purging plan; you can find it by simply searching on Baidu Wenku
Hello, I did some searches online when posting this question, and I also looked up some articles on purging on CNKI； However, no quantitative solution was found therein. How do you ensure that the flow rate is greater than 30 m/s during purging? I’m thinking that the only way is to calculate the flow rate based on the boiler’s output capacity and the diameter of the pipes. Does anyone have a better method?
Calculate the corresponding flow velocity from diameter, flow rate, and pressure
Currently, it is assessed that safety cost control for steam purging is relatively high. The plan now is to first warm up the steam pipes by tapping the welded areas, as warming the pipes causes the oxide scale and slag inside them to fall off due to differences in their thermal expansion coefficients. After the pipe has cooled down, it is purged with 8 bar of compressed air. I’m not sure if this is reasonable