Annex
FLUXUS F60*
C Reference
237
UMFLUXUS_F60xV5-0EN, 2017-10-16
C.2
Typical roughness values of pipes
The values are based on experience and measurements.
material
absolute roughness [mm]
drawn pipes of non-ferrous metal, glass, plastics and
light metal
0…0.0015
drawn steel pipes
0.01…0.05
fine-planed, polished surface
max. 0.01
planed surface
0.01…0.04
rough-planed surface
0.05…0.1
welded steel pipes, new
0.05…0.1
after long use, cleaned
0.15…0.2
moderately rusted, slightly encrusted
max. 0.4
heavily encrusted
max. 3
cast iron pipes:
bitumen lining
> 0.12
new, without lining
0.25…1
rusted
1…1.5
encrusted
1.5…3