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      11 Jun
    Ajay S. Satpute

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Chemical and Process Engineering Resources

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Category: Fluid Dynamics
Question: What is a good estimate for the absolute roughness for epoxy lined carbon steel pipe?
Keywords: expoxy,coated,steel,pipe,roughness
Answer: The specific roughness for welded, seamless steel is .0002 ft. PVC has a specific roughness of 0.000005 ft.You may also want to consider using the Hazen-Williamsformula, which lists a coefficient of 130-140 for cement-lined cast iron piping. You need to decide which is moreconservative for your application.