(4)
Select a relatively new straight pipe line if it is possible. Old pipe tends to have
corrosions and depositions, which could affect the results. If you have to work on an old
pipe, we recommend you to treat the corrosions and depositions as if they are part of the
pipe wall or as part of the liner. For example, you can add an extra value to the pipe wall
thickness parameter or the liner thickness parameter to take into account the deposition.
(5)
Some pipes may have a kind of plastic liner which creates a certain amount of gaps
between the liner and the inner pipe wall. These gaps could prevent ultrasonic waves
directly traveling. Such conditions will make the measurement very difficult. Whenever
possible, try to avoid this kind of pipes. If you have to work on this kind of pipe, try our
plug-in transducers that are installed permanently on the pipe by drilling holes on the pipe
while liquid is running inside.
L u p
L d n
L u p
L d n
L u p
L u p
L u p
L d n
L d n
L d n
P i p i n g C o n f i g u r a t i o n
a n d
T r a n s d u c e r P o s i t i o n
U p s t r e a m
D i m e n s i o n
D o w n s t r e a m
D i m e n s i o n
L d n
x D ia m e te rs
L u p
x D ia m e te rs
1 0 D
5 D
1 0 D
1 0 D
1 2 D
2 0 D
2 0 D
5 D
5 D
5 D
5 D
5 D
L u p
L d n
3 0 D
5 D
L u p
L d n
Piping Configuration and
Transducer Position
Upstream
Dimension
L
up
x Diameters
Downstream
Dimension
L
down
x Diameters
10D
10D
10D
12D
20D
20D
30D
5D
5D
5D
5D
5D
5D
5D
5D
18