Is there any problem with this pipeline installation?
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The four pipelines are for chilled water supply and return, as well as circulating water supply and return. After emerging from the main pipe, these four pipes share a common drain pipe. Is such a design reasonable? Are there any specific regulatory requirements? Chemical Equipment and Machinery
Sharing a water pipe seems fine to me; there’s nothing wrong with that
It can be used; the drainage operations shouldn’t affect each other, right?
1. No valves should be installed downstream of the drain pipe; this ensures that the pressure remains below the lowest pressure among the four water pipes, thereby preventing any possible cross-contamination. 2. The diameter of the drain pipe should be determined based on the maximum simultaneous discharge capacity of the four water pipes. 3. If the process allows for the mixing of the chilled water and circulating water discharged through the drain pipe, then the aforementioned piping arrangement seems appropriate. 4. If it is necessary to have separate bypass circuits for the inlet and outlet streams of either the chilled water or circulating water, an additional connecting valve can be added for that particular stream, thereby providing greater flexibility in operation
Thank you, the information is very comprehensive. I’m not sure if there are specific regulations; one could look for the relevant requirements.
Previously, different media each had their own separate drain, and there was nothing like this four-in-one design.
There is no impact during drainage; could there be cross-contamination of the media?
Generally, no, unless your drain pipe is blocked.
Just don’t turn on the vents at the same time; generally, the pressure behind the valve is much lower than the pipeline pressure. Unless a valve is faulty or leaking internally, and at the same time the main pipe is blocked, opening another valve in such a situation will result in high pressure on the high side and low pressure on the low side. Under normal circumstances, even if there is a slight internal leakage in the valve, as long as the main pipe is not blocked, there will be no issue of cross-contamination when other valves are opened.