Annex
FLUXUS G809
C Reference
179
UMFLUXUS_G809V2-2EN, 2020-06-25
C.2
Typical roughness values of pipes
The values are based on experience and measurements.
C.3
Typical properties of selected fluids at 20 °C and 1 bar
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
fluid (display)
explanation
sound speed [m/s]
kinematic viscosity [mm
2
/s]
density [g/cm
3
]
Aceton
acetone
1190
0.4
0.7300
Ammonia(NH3)
ammonia (NH
3
)
1386
0.2
0.6130
Gasoline
gasoline
1295
0.7
0.8800
Beer
beer
1482
1.0
0.9980
BP Transcal LT
BP Transcal LT
1365
20.1
0.8760
BP Transcal N
BP Transcal N
1365
94.3
0.8760
Diesel
diesel
1210
7.1
0.8260
Std. natural gas
natural gas, stan
-
dard composition
433
12.42
0.0010
Ethanol
ethanol
1402
1.5
0.7950
HF acid 50%
hydrofluoric acid
50 %
1221
1.0
0.9980
HF acid 80%
hydrofluoric acid
80 %
777
1.0
0.9980
Glycol
glycol
1665
18.6
1.1100
20% Glycol / H2O
glycol/H
2
O, 20 %
1655
1.7
1.0280
30% Glycol / H2O
glycol/H
2
O, 30 %
1672
2.2
1.0440
40% Glycol / H2O
glycol/H
2
O, 40 %
1688
3.3
1.0600
50% Glycol / H2O
glycol/H
2
O, 50 %
1705
4.1
1.0750
