SFIDK.PS.029.Q3.02
15
4. Sensor installation
Sensor inst.
SITRANS F US SONOFLO
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It is preferable to mount the sensor in a vertically
inclined line to minimize wear.
4.7
Measuring liquids
containing abrasive
or other particles
To maximise performance it is necessary to
have straight inlet and outlet conditions, and a
certain distance between meter, bends, pump
and valves. It is also important to centre the
flowmeter in relation to pipe flanges and gaskets.
Valves must always be placed after the flow-
meter. The only exception is when installing the
sensor in a vertical pipe. In this case a valve
below the sensor is necessary to allow the zero-
point adjustment. It is important to select a
valve, which has no impact on the flow when
fully open.
Recommended inlet:
Fully open valve without any restriction to the
flow: min. 10 x pipe diameter.
Partly open valve: min. 40 x pipe diameter.
Pumps: min. 20 x pipe diameter.
Bends: min. 10 x pipe diameter.
Recommended outlet: 3 x pipe diameter.
If more bends than one, please contact Siemens
Flow Instruments for advice.
4.8
Inlet and outlet
conditions
Flow
4.9
Permissible pressure
and temperature
Maximum permissible pressure and temperature for Siemens Flow Instruments ultrasonic flowmeters
can be seen on the sensor label.
Flanges according to PN
Flanges and joints as well as related pressure/temperature (p/t) classification have been described
in EN 1092.
For steel group 1E1: Table 15
For stainless steel group 13E0: Table 18
Flanges according to ANSI Class
Flanges and joints as well as related pressure/temperature (p/t) classification have been described
in EN 1759-1.
For steel group 1.1 ASTM A105, class 150: Table 16
For steel group 1.1 ASTM A105, class 300: Table 1
For stainless steel group 2.3 F304 L/316 L, class 150: Table 16
For stainless steel group 2.3 F304 L/316 L, class 300: Table 1
No flange bolts and gaskets are supplied. Bolts must comply with EN 1515-2 and gaskets with EN
1591-1.
Warning!
Exposing the sensors to pressures/temperatures above the limits stated may cause damage. The
sensor construction does not allow any other external action other than what is normal during
common mounting in the pipeline. Provide for earthquakes, action of the air etc.
The transducer holders must not be used for any other purpose.
4.10 Corrosion
The meters have been designed according to EN 13480 with an additional corrosion layer of approx.
1 mm for steel sensors. Stainless steel sensors do not have an additional layer. The customer is
responsible for checking that the actual medium can be used with the sensor material chosen.