230 UMG70XV3-4EN 12.01.2009
C Reference
C Reference
The following tables provide assistance for the user. The accuracy of the data depends
on the composition, the temperature and the manufacturing process of the material.
FLEXIM does not assume liability for any inaccuracies.
Table C.1: Sound Velocity of Selected Pipe and Lining Materials
at 20 °C
The values of some of these materials are stored in the internal database of the flowme-
ter. In column cflow, the sound velocity (longitudinal or transversal) used for flow mea-
surement is indicated.
Take into consideration for the measuring task that the sound velocity depends on the
composition and the manufacturing process of the material.
The sound velocity of alloys and cast materials strongly fluctuates. The values serve as
an orientation only.
material c
trans
[m/s]
c
long
[m/s]
c
flow
material c
trans
[m/s]
c
long
[m/s]
c
flow
aluminum 3100 6300 trans platinum 1670 trans
asbestos
cement
2200 trans polyethylene 925 trans
lead 700 2200 trans polystyrene 1150 trans
bitumen 2500 trans PP 2600 trans
brass 2100 4300 trans PVC 2395 long
carbon steel 3230 5800 trans PVC (hard) 948 trans
copper 2260 4700 trans PVDF 760 2050 long
Cu-Ni-Fe 2510 trans quartz glass 3515 trans
ductile iron 2650 trans rubber 1900 2400 trans
glass 3400 4700 trans silver 1590 trans
grey cast iron 2650 4600 trans Sintimid 2472 long
PE 1950 long stainless steel 3230 5790 trans
Perspex 1250 2730 long Teka PEEK 2537 long
PFA 1185 long Tekason 2230 long
plastics 1120 2000 long titanium 3067 5955 trans
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