SF Pressure Drop Online-Calculator:

Roughness of pipes

Aluminium, drawn/pressed new 0.0013 - 0.0015 mm
Aluminium, drawn/pressed used to 0.03 mm
Asbestos-cement new, smooth 0.03 - 0.1 mm
Brass, drawn/pressed new 0.0013 - 0.0014 mm
Brass, drawn/pressed used to 0.03 mm
Cast iron average city severage 1.2 mm
Cast iron incrusted to 3.0 mm
Cast iron new, bituminized 0.10 - 0.13 mm
Cast iron new, with skin 0.2 - 0.6 mm
Cast iron operating several years, cleaned 1.5 mm
Cast iron slightly rusty 1.0 - 1.5 mm
Clay new, clay tile 9.0 mm
Clay, Drainage-pipe new, calcined 0.7 mm
Concrete new, medium rough 1.0 - 2.0 mm
Concrete new, rough 2.0 - 3.0 mm
Concrete new, smooth 0.3 - 0.8 mm
Concrete operating several years 0.2 - 0.3 mm
Concrete, Centrifugal- new, smooth plastered 0.1 - 0.15 mm
Concrete, Centrifugal- new, without plaster 0.2 - 0.8 mm
Concrete, Steel- new, smooth 01. - 0.15 mm
Copper, drawn/pressed new 0.0013 - 0.0015 mm
Copper, drawn/pressed used to 0.03 mm
Glass, drawn/pressed new 0.0013 - 0.0015 mm
Glass, drawn/pressed used to 0.03 mm
Plastic, drawn/pressed new 0.0013 - 0.0015 mm
Plastic, drawn/pressed used to 0.03 mm
Rubber new, smoot 0.0016 mm
Steel after long operation cleaned 0.15 - 0.20 mm
Steel homogeneous corrosion pits 0.15 mm
Steel intensely incrusted 2.0 - 4.0 mm
Steel slightly rusty and incrusted 0.15 - 0.40 mm
Steel, longitudinal welded new, bituminized 0.01 - 0.05 mm
Steel, longitudinal welded new, galvanized 0.008 mm
Steel, longitudinal welded new, rolling skin 0.04 - 0.1 mm
Steel, weldless new, comm.size galvanized 0.10 - 0.16 mm
Steel, weldless new, neatly galvanized 0.07 - 0.10 mm
Steel, weldless new, pickled 0.03 - 0.04 mm
Steel, weldless new, rolling skin 0.02 - 0.06 mm
Steel, weldless new, unpickled 0.03 - 0.06 mm
Stoneware 0.25 mm
Wood after long operating 0.1 mm
Wood new 0.2 - 1.0 mm