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Table 1

Pipe, roughness, and the corresponding grit size of the sand paper

PipeRoughness (μm)Grit size of sand paper (mesh)
Cast iron pipe 250 60 
Galvanized/clay pipe 150 100 
Steel/PVC pipe 38 400 
Plexiglass pipe 0.041 
PipeRoughness (μm)Grit size of sand paper (mesh)
Cast iron pipe 250 60 
Galvanized/clay pipe 150 100 
Steel/PVC pipe 38 400 
Plexiglass pipe 0.041 
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