Annex
PIOX S72* C Reference
219
UMPIOX_S72xV1-9EN, 2022-05-15
C Reference
The following tables provide assistance for the user. The accuracy of the data depends on the composition, temperature
and processing of the material. FLEXIM does not assume liability for any inaccuracies.
C.1 Sound speed of selected pipe and lining materials at 20 °C
The values of some of these materials are stored in the internal database of the transmitter. Column c
flow
shows the type
of sound wave (longitudinal or transversal) used for the flow measurement.
The sound speed depends on the composition and processing of the material. The sound speed of alloys and cast
materials fluctuates strongly. The values only serve as an orientation.
material (display) explanation c
trans
[m/s] c
long
[m/s] c
flow
Carbon steel steel, normal 3230 5930 trans
Stainless steel steel, stainless 3100 5790 trans
DUPLEX duplex stainless steel 3272 5720 trans
Ductile iron ductile iron 2650 - trans
Asbestos cement asbestos cement 2200 - trans
Titanium titanium 3067 5955 trans
Copper copper 2260 4700 trans
Aluminum aluminum 3100 6300 trans
Brass brass 2100 4300 trans
Plastic plastic 1120 2000 long
GRP glass reinforced plastic - 2650 long
PVC polyvinyl chloride - 2395 long
PE polyethylene 540 1950 long
PP polypropylene 2600 2550 trans
Bitumen bitumen 2500 - trans
Acrylic glass acrylic glass 1250 2730 long
Lead lead 700 2200 long
Cu-Ni-Fe copper-nickel-iron alloy 2510 4900 trans
Cast iron gray cast iron 2200 4600 trans
Rubber rubber 1900 2400 trans
Glass glass 3400 5600 trans
PFA perfluoralcoxy 500 1185 long
PVDF polyvinylidene fluorid 760 2050 long
Sintimid Sintimid - 2472 long
Teka PEEK Teka PEEK - 2534 long
Tekason Tekason - 2230 long
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