Integrated Hot Tap Fitting - ABB SensyMaster FMT230 Commissioning Instruction

SENSYMASTER FMT230, FMT250 THERMAL MASS FLOWMETER | CI/FMT230/250-EN REV. A
4.4.3

Integrated hot tap fitting

Wafer type design
Installation of the wafer type design is performed as explained
in chapter 'Assembly of the pipe component' on page 10 .
Welding design
DANGER
Danger to life due to improper installation!
Do not shorten hot tap fitting components or interfere with
the design. This can lead to the measuring medium escaping
in an uncontrolled manner. This can result in severe injuries or
death.
The welding version of the integrated changing device is
available in two installation lengths:
— for nominal diameters DN 100 ... DN 125 (4 ... 5") and
— for nominal diameters DN 150 ... DN 300 (6 ... 12")
NOTICE
— The sensor length h is 425 mm (16.73 inch) respectively.
— The installation depth Y depends on the pipe diameter
and must be calculated individually.
1
3
Fig. 13: Integrated changing device in measurement position,
dimensions in mm (inch)
1 Sensor 2 Centering pin 3 Flow direction
2
Ø50
(2)
G10852
Calculation of the outside length X and installation depth Y
 
 
X h D
2 /
 
 
Y D
2 / 28
X Outside length of the integrated changing device
Y Installation depth of the integrated changing device
h Sensor length
D Outside diameter of the pipeline
Example
— Sensor length h = 425 mm (16.73 inch)
— Pipe with external diameter of 210 mm (8.27 inch)
— The changing device is in measurement position
X = 425 mm - (210 mm / 2) = 320 mm
Y = (210 mm / 2) - 28 mm = 77 mm
Consider the following points when installing the welding
version in the piping:
— Maintain a right angle to the pipe axis (max. tolerance 2°).
— The adapter centering pin must be aligned with the pipe
axis in the flow direction (outflow side, behind the
measuring point).
NOTICE
Damage to components
If the welded joints become hot, warping of the sealing
surfaces and / or damage to the O-rings can occur.
Pause occasionally to allow the fitting to cool.
NOTICE
Impact on measuring accuracy
Deviations from the stated dimension and position tolerances
have an impact on measuring accuracy.
mm inch
1 ( 1 . )
15