Non-Conductive Pipe Grounding
IMPORTANT
If the process pipe is not electrically conductive (PVC, fiberglass, cement-lined pipes or any other non-conductive material) and the
meter was not originally ordered with an optional grounding electrode, you must install a pair of grounding rings between the
mating flanges at both ends of the meter. See the following illustration.
In this case, connect the grounding straps to both of the grounding rings and
to a good, solid earth ground. Grounding rings are available in stainless steel.
If your fluid is too aggressive for stainless steel, order a meter with the optional
grounding electrode in a material compatible with the fluid.
GASKETS RECOMMENDED
GROUNDING RING
GROUNDING RING
Figure 17: Non-conductive pipe grounding
Pipelines with Cathodic Protection
For pipelines with cathodic protection, install the meter potential-
free. No electric connection from the meter to the pipeline
system may exist and the power supply is to be provided via
isolating transformer.
USE GROUNDING ELECTRODES. INSTALL GROUNDING RINGS
ISOLATED FROM THE PIPELINE.
OBSERVE NATIONAL RULES REGARDING
POTENTIAL‑FREEINSTALLATIONS.
Figure 18: Potential-free installation
Electrically Disturbed Environment
If the pipe material is in an electrically disturbed environment or if
metallic pipelines that are not grounded are used, we recommend a
grounding as shown in the following picture in order to make sure
that measurement is not influenced.
BA5000-20-MID
PE
Figure 19: Grounding for electrically disturbed environment
Meter Gaskets and Grounding
MAG-UM-00219-EN-17 Page 15 June 2021
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