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3. MOUNTING REQUIREMENTS
3.1. Requirements for Mounting the Primary converter
3.1.1. General Requirements.
3.1.1.1. The following requirements should be observed on-site of CP mounting:
- Liquid pressure in the pipeline and operation conditions must not be of
values that may facilitate gas (air) release and/or accumulation
- When the flowmeter is operated, the pipeline should be fully filled with
liquid
- Flow turbulence and pulsations are minimal.
The CP can be mounted into the pipeline horizontally, vertically, or
obliquely (Fig.1). The CP should not be placed at the upper point of the
pipeline or in the open-ended pipeline. The recommended location (if
applicable) is at the lower or uprising pipeline section.
Fig.1. Recommended locations of the CP.
3.1.1.2. The difference in the internal diameters of the pipeline and a measuring
cut (MS) of the CP at a link up point should not exceed 0.05 DN for
straight measuring cuts and 0.1 DN for CPs of U-elbow type.
3.1.1.3. It is not recommended to install CP so that the PEA was
in the upper or lower circular points of the pipeline cross-section.
3.1.2. Placing the PEA pair for single-beam sounding
CP with mounting PEAs on the diameter should be placed so that
the PEA longitudinal axis (the axis that runs through the PEA pair along
the pipeline axis) would make an angle with the vertical of
= 45
10
(Fig.2). The PEAs can be mounted horizontally.
Fig.2. Recommended locations of the PEA pair when mounting
“on the di-
ameter” (single-beam sounding).
