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1.1 After the installation is in place, make sure that all chips and debris have been removed, the system has been purged, pressure tested, air flow entered, and boosted to the flow meter inlet valve.
1.2 Open Turbine Flowmeter Upstream Bypass Ball Valve
1.3 Slowly open the small bypass valve upstream of the turbine flow meter and slowly fill the gas until the turbine flow meter is in front of the electrically forced seal ball valve.
Note: Turbo-flow meters can be damaged if the pressure is violently oscillating or excessively high-speed pressurization. In order to protect the gas turbine flow meter, the pressure increase applied to the turbine flow meter must not exceed 35 kPa/s. If the pressure change cannot be measured at the site, the monitoring turbine flow rate cannot be exceeded.
1.4 Close the bypass ball valve and stop valve.
1.5 Turn the handwheel to open the inlet force seal valve.
1.6 Slowly open the turbine flowmeter downstream of the electric forced seal ball valve (at least for 1 minute). The manual switch on the actuator should be used. Be careful not to overspeed the turbine flowmeter.
1.7 According to steps 1.2-1.6, the entire system is fully charged and natural gas is measured.
2 Online Comparison of Gas Turbine Flowmeters (Comparison of Work Path and Main Path)
2.1 Ensure that the inlet and outlet valves of the main road are closed.
2.2 In accordance with steps 1.2, 1.3, and 1.4 in “1 Use of Each Road,†pressurize the main road.
2.3 Close the work road outlet electric forced seal ball valve, slowly open the forced seal ball valve of the comparison pipe, slowly open the main road outlet electric forced seal ball valve.
It should be doing three things at the same time.
2.4 The gas passes through the work path and the main path in turn. The two turbine meters can be compared to each other to check for large deviations.
2.5 When the comparison is finished, close the two forced seal ball valves on the matching line and on the main road, and open the outlet ball valve of the working line.
It should be done at the same time.
2.6 At this time, the work route is back to work.
3 Online Calibration of Gas Turbine Flowmeters Using a Mobile Calibration Car
3.1 Ensure that the electric forced seal ball valve between the two calibration ports is closed.
3.2 Open the small ball valve on the blind flange of the calibration port flange to ensure no pressure inside the flange blind plate. Then remove the blind flange.
3.3 Connect the mobile calibration car and calibration port.
3.4 In accordance with steps 1.2, 1.3, and 1.4 in “1 Use of Each Road,†pressurize the main road.
3.5 Close the work road outlet electric forced seal ball valve, slowly open the forced seal ball valve of the comparison pipe, and slowly open the two calibrated forced seal ball valves on the main road. It should be done at the same time.
3.6 At this point, the gases flow through the two gas turbine flow meters and the mobile calibration car in the seat.
3.7 After completing the online calibration, close the two Orbit ball valves on the calibration port, slowly open the forced seal ball valve of the comparison line, and slowly open the electric forced seal ball valve on the working path outlet. It should be done at the same time.
3.8 Replace the flange blind plate and do not forget to close the ball valve on the flange blind plate.
3.9 At this time, the work road is back to work