Proline t-mass 65F, 65I
16
Hauser
Pipework requirements
Good installation practice should be followed at all times:
• Cleaned pipe and flange welded joints
• Correctly sized gaskets
• Correctly aligned flanges and gaskets
• The use of seamless pipe immediately upstream of the flowmeter.
• The use of pipework with a matching internal diameter to that of the flowmeter to ensure that no step dis-
turbance greater than 1 mm (0.04 inch) can occur at the meter inlet or outlet, 3 mm (0.12 inch) for diam-
eters > DN 200 (> 8").
• As a general comment, anything that disturbs the smoothness of the internal pipe wall (see figure below)
should be eliminated; the goal should be a smooth uninterrupted internal surface.
For further information please refer to ISO 14511.
Insertion version
Insertion depth
When installing the sensor, the following three dimensions need to be taken into account to allow the correct
insertion length to be specified:
• A = Internal diameter of the circular pipe or for a rectangular duct, the duct height if the sensor is to be
mounted vertically or duct width if it is to be mounted horizontally
• B = Pipe wall thickness
• C = Height of the mounting boss on the pipe or duct including the sensor fitting and cold/hot tap if fitted.
The tube section is supplied with a graduated scale along its length calibrated in millimeters or inches. It is
important that the sensor be installed so that the top of the adjustable fitting is aligned with the value on the
scale that is equal to the following calculated value:
• For pipe diameters < DN 100 (4"):
(0.3 x A) + B + C + 2 mm (0.079 inch)
• For pipe diameters
≥
DN 100 (4"):
(0.2 x A) + B + C + 3 mm (0.12 inch)
When the sensor is at the correct insertion depth the sensor must next be aligned for the correct flow direction.
After alignment, the sensor fitting must be tightened to secure and seal the insertion tube.
It is essential that all installation dimensions are supplied at the time of order to allow correct manufacture and
calibration, especially when the mounting boss is provided by the customer. The same requirement exists for
insertion sensors supplied to fit DN80 to 100 (3" to 4") pipe sizes (regardless of the type of process connection)
since they require calibration with the identical mechanical setup as the final installation.
a0005103
Cleaned and flange welded joints
a0005104
a0005105
a0005106
Pipe diameter one is not equal pipe
diameter two
Incorrectly sized gaskets
Incorrectly aligned flanges and gaskets
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