Prerequisite for a successful pressure test on a newly installed water pipeline or a recommissioned one - The pipeline section to be tested is filled with drinking water and vented. The basic prerequisite for assessing the tightness of a pipeline is sufficient venting. This cannot always be achieved by flushing with water, so pigging should be carried out in these cases.
No, the air pocket wouldn't come back when the pig is removed, provided the pipeline remains filled with water. Once the pig has pushed out the air and the pipeline is filled with water, the water acts as a barrier preventing air from re-entering the pipeline. The water's presence ensures that the space previously occupied by the air remains filled, and air cannot re-enter unless there's a source of air ingress or the water is drained. However, it's important to note that while the pigging procedure removes large air pockets, very small residual amounts of air might remain, especially at pipe connections or other irregularities in the pipeline. These small amounts of air are typically not significant enough to impact the pipeline's performance or the accuracy of a pressure test.
There are numerous different sizes of pigs, depending on the requirements of the pipeline. The plastic material used, e.g. foam, varies in softness and flexibility. We are experts when it comes to water and this might help further www.esders.com/2020/08/the-basics-of-pressure-tests-on-water-pipelines/
How do these pockets form? Is it from a period of low water flow that doesnt recover when the flow is increased again?
Prerequisite for a successful pressure test on a newly installed water pipeline or a recommissioned one -
The pipeline section to be tested is filled with drinking water and vented. The basic prerequisite for assessing the tightness of a pipeline is sufficient venting. This cannot always be achieved by flushing with water, so pigging should be carried out in these cases.
Wouldnt the air pocket come back when the pig is removed?
No, the air pocket wouldn't come back when the pig is removed, provided the pipeline remains filled with water. Once the pig has pushed out the air and the pipeline is filled with water, the water acts as a barrier preventing air from re-entering the pipeline. The water's presence ensures that the space previously occupied by the air remains filled, and air cannot re-enter unless there's a source of air ingress or the water is drained.
However, it's important to note that while the pigging procedure removes large air pockets, very small residual amounts of air might remain, especially at pipe connections or other irregularities in the pipeline. These small amounts of air are typically not significant enough to impact the pipeline's performance or the accuracy of a pressure test.
this is incredibly fascinating, i wonder if there are different firmness of sponge for different density liquids, or maybe it doesnt matter?
There are numerous different sizes of pigs, depending on the requirements of the pipeline.
The plastic material used, e.g. foam, varies in softness and flexibility. We are experts when it comes to water and this might help further www.esders.com/2020/08/the-basics-of-pressure-tests-on-water-pipelines/
To bad they won’t even talk to me about how to do this to my water system
Our apologies for the late reply. How can we help?
@@EsdersDe I need to ice pig 60,000 lf of 6&8” water mains but the most pressing emergency is the 6” main