Baker Hughes Panametrics PanaFlow Z3, User Manual

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Chapter 5. Maintenance and Service
64 PanaFlow Z3 User’s Manual
5.1.1 Servicing the Pipe Interface
Only properly trained personnel (i.e. pipe fitters) should service the pipe flanges. The proper gasket material, nuts,
bolts, nut and bolt torque and tightening sequence should always be used.
5.1.2 Servicing the Sensor Ports or Transmitter Interface
The sensor ports contain the sensors and sensor wiring. These ports should only be serviced by properly trained and
qualified service technicians. Modification or alteration in any manner may impact performance of the system.
5.1.2.1 Required Equipment
•
10 mm hex drive socket or wrench
•
12 mm hex drive socket or wrench
5.1.2.2 Instructions to Relieve Pressure in the Sensor Port or Transmitter Interface
1. Locate the upstream "A" plane sensor quadrant. This is the plane with two transducer paths along it and is
highlighted in
Figure 44 , Figure 45 , and Figure 46 . The opposite flow path, with only one pair of transducers, is
referred to as the "B" plane sensor quadrant. On larger flowcell sizes, all transducer paths may be located on the
same plane.
2. Relieve potential pressure build-up by loosening the Pressure Relief Plug on the bottom of the Upstream "A" Plane
Sensor Quadrant as shown in step 1 above, using 10 mm hex tool. Slowly loosen the pressure relief plug 2-3 full
turns or until the plug bottoms out on the built-in safety stop.
3. Listen and observe for:
a.
Any hissing is heard (air or gas release), stop loosening the plug and wait for the hissing to stop. If hissing
continues for more than 10 minutes, retighten the plug and consult the factory.
b. Any liquid discharge is observed, stop loosening the plug and retighten completely
c. If no hissing or discharge is observed and the plug has been backed out to the safety stop, then any pressure
buildup has been released and the ports are now serviceable.
WARNING!
Before opening the meter body, it must not contain any pressure.
WARNING!
Before you open the sensor ports or transmitter interface, the system must not contain
any pressure.
WARNING!
If any liquid discharge is observed at the pressure relief plug, then the process pressure
must be removed from the pipeline prior to servicing the sensor ports or transmitter
interface.