1.3.2 Pipeline cleaning maintenance
WARNING!
BURST HAZARD
Before pipeline cleaning and maintenance ("pigging operations"), remove straightening vanes
or flow conditioners. Failure to do so may cause excessive pressure in the meter system,
resulting in serious injury/death or equipment damage.
3410 Series Gas Ultrasonic Flow Meter with flow conditioner for uni-
directional flow
Figure 1-5:
3410 Series Gas Ultrasonic Flow Meter with flow conditioner for bi-
directional flow
Figure 1-6:
Straightening vanes or flow profilers must be removed during pipeline cleaning
maintenance operations (“pigging operation”). If the meter run is pigged with a flow
conditioner in line, pressure may build up and cause the pipes and flanges to burst and
severely injure personnel. The excessive pressure may damage the meter or the transducer
ports may collect debris which may impede data acquisition and flow measurement.
1.3.3
Visual inspection
Periodically inspect meter and meter run for signs of components loosening or seals
leaking. This includes:
Maintenance
8 Gas Ultrasonic Flow Meters
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