Rubber Lined Carbon Steel Roughness: Solid Handbook Value

Summary for rubber lined carbon steel roughness Discussion

Absolute roughness for rubber lined carbon steel is the thread’s main topic, with the original question asking for a good guesstimate for hydraulic calculations in a cooling water system. Horst Müller later cites a reference from the McGraw-Hill *Slurry Systems Handbook*, which gives an absolute roughness of 0.00015 m for rubber lined pipes. A follow-up question from Jeong asks for roughness values for new versus fouled rubber lining and typical differences, but no answer is shown in the excerpt. Based on the available discussion, the only specific value provided is Müller’s handbook reference, and no separate fouled-lining data is given in the thread text.