VEGA VEGAPULS 56K - Manual (Page 18)

18 VEGAPULS 56K
22915-EN-041227
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0 %
~45˚
ø 51,2
0,0…0,4
1,5…2
2,9
0,0...0,4
150…500
5…15
2,9…6
100 %
Mounting and installation
Guidelines for standpipe construction
Radar sensors for measurement on surge or
bypass tubes are used in the flange sizes
DN 50, DN 80, DN 100 and DN 150.
On the left you see the constructional fea-
tures of a measuring pipe (surge or bypass
tube) as exemplified by a radar sensor with a
DN 50 flange.
The radar sensor with DN 50 flange forms a
functioning measuring system only in con-
junction with a measuring pipe.
The measuring pipe must be smooth inside
(average roughness Rz
≤ 30). Use stainless
steel tubing (drawn or welded lengthwise) for
construction of the measuring pipe. Extend
the measuring pipe to the required length
with weld-on flanges or with connecting
sleeves. Make sure that no shoulders or
projections are created during welding. Be-
fore welding, join pipe and flange with their
inner surfaces flush and exactly fitting.
Avoid welding through the pipe wall. The pipe
must remain smooth inside. Roughness or
welding beads on the inner surfaces must be
carefully removed and burnished, as they
cause false echoes and encourage product
buildup.
Flange DN 50
Welding neck flange
Connecting
sleeve
Welding neck
flanges
Welding of the connect-
ing sleeves
Welding of the welding
neck flange
Meas. pipe fasten-
ing
Vessel bottom
Deflector
Min. product level
to be measured
(0 %)
Rz
≤ 30
Deburr the
holes