"One of our inspection techniques, requires the tubes to be flooded with water and we use your
HFT Pipestopper® Plugs on vertical exchanger tubes".
They work really well says Richard Granville from Oceaneering.
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Another one of the 101 uses for HFT Pipestoppers® Plugs,
that are available for diameters from 1/2" to 96".
If you want to know more, click on HFT Pipestoppers® Pipe Plugs and Stoppers Range.
