Why is corrosion of iron important in the hydraulic analysis of an existing, old

Question

Why is corrosion of iron important in the hydraulic analysis of an existing, old drinking water supply piping network? How would you determine the degree of corrosion that may exist in an existing network of water supply piping? If you were designing a new drinking water system using cement lined ductile iron pipe, what Hazen-Williams C-Value would you use for design and how would you plan for any future changes in C-Value, if any? How would you determine what the actual -Value is in an existing piping network?

Explanation / Answer

The conversion factor k was chosen so that the values for C were the same as in the Ch

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