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Gauging Pigs 

 
TDW Gauging Pigs are designed to indicate obstructions in a pipeline. The slotted aluminum gauge plates will deform and stay deformed if they encounter an obstruction in the line. Since they are made of aluminum they will not damage the internal surface of the pipe.

The pigs will traverse 1.5DR bends unless otherwise noted.  They are not recommended for lines containing check valves unless the valves can be locked in the open position.
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