May I ask why chemical pipelines should be vented at high points and drained at low points?
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May I ask why chemical pipelines should be vented at high points and drained at low points?
Venting at high points is to prevent non-condensable gas from forming a gas resistance on the liquid in the pipeline, and venting at low points is to prevent liquid accumulation at low points from forming resistance to gas, and also to prevent the liquid in the pipeline from freezing at low points. This is how I understand it, please continue to add anything inappropriate.
The gas density is small and the high points collect to form air blockage. Therefore, it is necessary to vent the gas at high points where the impurities have a high density and collect at high points.
Will non-condensable gas accumulate at high points in pipelines that transport liquids? Do pipelines transporting gas also need to be set up at a low point to drain liquid?
Exhaust at high points may also be required for water pressure testing, and the air must be removed before water injection. Of course, it is more important to isolate the equipment when driving and make sure all pressure and chemicals are drained before repairs. . .
Exhaust air at the high point and drain liquid at the bottom point are required for system pressure testing, maintenance, etc.
Conducive to operations such as purging and replacement!
Combining the views from the 2nd and 5th floors is the most comprehensive!
The safety valve is installed at the high point to prevent air blockage, and the low point is for draining sewage and preventing freezing. Use it when parking
Thanks for the guidance, I know now. :lol
The high point is set to vent, the low point is set to drain, and the other point is convenient for maintenance and safe to operate.
hehe. It seems like a common sense question, right? :L
Venting at high points is because the gas density is small, and it continues to rise and gather at the high points to form non-condensable gas, which creates an air resistance to the fluid in the pipeline. Condensation at low points is due to the high density of impurities, which settle at low points to form liquid accumulation or scale, which creates resistance or even blockage to the fluid.
Water flows downwards, while Qi flows upwards!
The high point degassing I understand includes the degassing at the highest point of the pipeline and local high points!
High point venting and low point pouring are all to drain the medium in the pipe, and have the functions of preventing pressure suppression, anti-freeze, and anti-corrosion. Generally, the high point is for gas and the low point is for liquid.
Haha, everyone is right, because the gas can be exhausted at high places and the liquid can be discharged at the bottom.
Since there may be accumulation of non-condensable gas at high points, venting is set to prevent air blockage, and exhausting at low points is to prevent hazards to personal and equipment safety during equipment maintenance.
The 2nd and 5th floors have the most comprehensive views
Then this person said it best! :lol But in fact, the statement on the 5th floor is closer to the purpose of actual use. Once the fluid flows normally, air resistance and liquid resistance are not easy to occur, but there will be problems when restarting after shutdown.
When shorting at high points, we must also consider pipeline safety factors.