Is there a standard cleaning time for various media?
Thread Content
It is necessary to clean the line after the work is stopped. Is there a standard time for cleaning the line with various media (mainly naphtha, kerosene, diesel, fuel oil, etc.)?
There is no standard. The time is related to the length of the pipeline and the steam pressure of the sweeping line. When we clean the line, we will open the drain valve from time to time. Observe how far the line is swept.
If the device is to be inspected after it is shut down, the oil removal and cleaning line must meet the inspection and fire safety requirements. Generally, it needs to be purged with steam for 24-48 hours. Pay attention to purging the pipelines one by one, and cleaning all dead corners to avoid cross-lines. Light oil pipelines must be properly purged, otherwise fires can easily lead to accidents. If no maintenance is required, just purge the pipeline after removing the oil.
It mainly depends on the purging effect, cleanliness and replacement effect. There are no hard indicators. Only when incomplete purging may cause major safety hazards, the maximum purging time is required, and this is also to ensure that the purging is sufficient.
Is there a standard for the cleaning time of various media?
There should be no hard and fast standards. Generally, there will be empirical data, but this data is basically a value based on long-term practical estimation statistics within the company. The main purpose is to completely replace the internal gas or purge the internal impurities. To purge the pipeline of impurities, just cover the outlet with a white cloth and purge for a period of time. If the white cloth has no dirty spots, it can be considered clean. As for completely replacing the gas in it, it's hard to say. The diameter, length, and purge volume of the pipe all have a lot to do with it. If you're not sure, just blow more.