Non-Conductive Or Electrically Insulated Pipeline - ABB MAG-X 3000 Series Instruction Manual

INSTRUCTION MANUAL 10DX3111A&G Sizes 14 - 24 Inches
FIGURE 2-7. GROUNDING RINGS and GASKETS

2.5.3 Non-Conductive or Electrically Insulated Pipeline

If the flowmeter is included as part of a non-conductive or liquid insulated pipeline (such as totally
plastic pipe, ceramic lined iron pipe, or cast pipe with internal bitumastic coating), the following
grounding procedures apply. Refer to Figure 2-6 to supplement the following text.
1) Usually, for this service, the meter has been specified to have liner protec-
tor/grounding rings. If not, obtain a pair of grounding rings and attach them to the
meter as shown in Figure 2-6. No gasket is required between the grounding ring and
the meter since it mates with the liner. However, a gasket is required between the
grounding ring and the process flange of the pipeline.
2) Attach the bonding wire and another length of ground wire to the tab of the
grounding ring. Use internal tooth lockwashers and hex head nut and bolts for
attachment as shown in the detail on Figure 2-6. The wire to the good ground should
be #12 AWG, or heavier, copper wire.
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