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2. Limescale - Wikipedia

   en.wikipedia.org/wiki/Limescale

   Limescale build-up inside a pipe reduces both liquid flow through the pipe and thermal conduction from the liquid to the outer pipe shell. Both effects will reduce the pipe's overall thermal efficiency when used as a heat exchanger. Limescale is a hard, chalky deposit, consisting mainly of calcium carbonate (CaCO 3).

3. Fouling - Wikipedia

   en.wikipedia.org/wiki/Fouling

   Limescale buildup inside a pipe reduces liquid flow through the pipe and reduces thermal conduction from the liquid to the outer pipe shell. Both effects will reduce the pipe's overall thermal efficiency when used as a heat exchanger. Extreme boiler pipe scale buildup Temperature dependence of the solubility of calcium sulfate (3 phases) in ...

4. Descaling agent - Wikipedia

   en.wikipedia.org/wiki/Descaling_agent

   Limescale build-up inside a pipe reduces both liquid flow and thermal conduction from the pipe, so will reduce thermal efficiency when used as a heat exchanger.. A descaling agent or chemical descaler is a liquid chemical substance used to remove limescale from metal surfaces in contact with hot water, such as in boilers, water heaters, and kettles.

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6. Arizona regulators fine natural gas utility $2 million over ...

   www.aol.com/arizona-regulators-fine-natural-gas...

   A natural gas utility with more than 2 million customers in Arizona, Nevada and parts of California is being fined $2 million by regulators in Arizona over concerns about piping that is known to ...

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