3-16
3.4 Appendix
3.4.1 General condition for straight pipe length
According to JEMIS032-1987, generally required straight pipe length for ultrasonic
flowmeter is defined as below.
Longer straight pipe length might be better to be choosen for ideal condition of
measurement.
L
≧
10D
Probe
L
≧
5D
L
≧
50D
10D
or more
L
≧
10D
L
≧
30D
D
1.5D or more
0.5D
or
more
L
≧
5D
L
≧
5D
L
≧
10D
L
≧
30D
When flow volume is adjusted
at the upstream valve.
L
≧
10D
When flow volume is adjusted
at the downstream valve.
P
L
≧
50D
Check valve
Gate valve
Upstream straight pipe length
Downstream straight pipe length
Section
90
゜
bend
T
Expanding
pipe
Various
valves
Pump
[Refer to JEMIS 032-1987.]
[D: pipe diameter]
Contracting
pipe
10D
or more
10D
or
more
Table 3.4.1-1
Summary of Contents for UFP-20
Page 1: ...Doc No KF08 002L Portable Ultrasonic Flowmeter UFP 20 Installation Operation Manual ...
Page 3: ... 2 The attachment of warning label is as follows Fig 1 2 Rear view of main unit Warning label ...
Page 8: ...1 Installation ...
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Page 130: ...2 Operation ...
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Page 193: ...3 8 3 2 4 Dimensions 1 Main Unit Fig 3 2 4 1 Main Unit Hand Strap ...