Is it possible that I've gotten this far into discussing pipe system cleaning, and specifically Pipe Pigging, without actually defining "Pipe Pigging" for those that had never heard of it?
Well, it seemed like maybe I had, so this post is to rectify that oversight. When wastewater force mains or other industrial piping systems experience reduced flow, progressive Pipe Pigging may be the best option to correct the situation, restoring maximal flow. But, just what is Pipe Pigging anyway? (Also called Polly Pigging or Poly Pigging) A professionally engineered piping system will have been created with certain flow rates, velocities and pressure in mind. In the life of the system, periods of low flow velocity or high concentrations of fat, oil and grease or sediment will lead to material build up on the inside of the pipes. This results in reduced flow, high energy costs and extra maintenance for the pumps, and possibly system failure that including a hazardous spills. Pipe pigging (or "Polly Pigging" / "Poly Pigging") is the use of a slug, often made of polyurethane, known as a pig, to clean the inside of a pipe. It is pushed through the system by the same force that carries the system's product, or pulled through the system using a cable. If you can remember the bank drive through with the pneumatic shuttle that carried your papers back and forth to the teller, the concept is similar, except that the shuttle is specifically designed to clean as it passes. It can often be done with very little or even zero interruption of service. Progressive poly pigging (polly pigging) is the use of various sizes and densities of pig, in sequence, through the pipe system, inspecting the pig and the product until the pipes are clean. Pipe Pigging can be used alone or with other methods such as high pressure water jetting to ensure your pipe system achieves and maintains its optimal flow.
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