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

2.5.3 Non-Conductive or Electrically Insulated Pipeline

If the meter 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 2-17 to supplement the following text.
1) For this service, the meter requires the use of grounding rings. The grounding rings
should be installed between the meter flanges and the mating flanges of the pipeline as
shown in Figure 2-14. A gasket is required on both sides of the grounding ring. If the meter
is supplied with a grounding ring/protector plate fastened to the meter flange,only one gas-
ket is required between the grounding ring/protector plate and the pipeline flange. Proper
gasket locations are shown in Figure 2-14.
2) Attach the bonding wire and ground wire to the tab of the grounding ring. Use internal
tooth lockwashers and hex head nut and bolts as shown in Figure 2-15. The ground wire
should be #12 AWG, or heavier, copper wire.
FIGURE 2-17. GROUNDING PROCEDURE; NON-CONDUCTIVE PIPELINE
Figure is for reference only, the flowmeter shown in this illustration is not the meter
2-22
10DS3111E INSTRUCTION MANUAL
described in this instruction bulletin.