Key points for purging glass fiber reinforced plastic pipelines
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It is necessary to purge a long section of glass fiber pipe line. When it is not possible to empty the line completely, using compressed air from a hose station to perform the purging may result in the presence of gas and liquid mixtures within the line, leading to its failure – especially in cases where there are many bends in the line. How can the pressure and flow rate of the compressed air be controlled to ensure that even a new employee can manage the risks effectively?； Add a portable tee at the outlet of the hose station; is a needle valve and pressure gauge required? (The hose stations are basically equipped with DN25 pipelines) Should the existing ball valves be replaced with globe valves? Of course, if you all have better methods, please feel free to share them!
1. One of the corrective measures: Use a needle valve installed on a portable tee to control the amount of purge gas through the needle valve and its outlet, thereby preventing water hammer effects