ONICON F-2600 - Manual (Page 25)

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F-2600 & F-2700 Vortex Flow Meter Manual 02/15 - 0808-7 / 19204 Page 25
2.3.1 Standard Installation Guidelines
!
CAUTION
When using toxic or corrosive gases, purge the line with inert gas for a minimum of four hours at
full gas flow before installing the flow meter.
Refer to a standard code for all pipe tapping operations. The following tapping
instructions are general in nature and intended as a guideline only.
1. Confirm that the installation site meets the minimum upstream and downstream pipe
diameter requirements. See Figure 4.
2. Turn off the flow of process gas, liquid or steam. Verify that the line is not pressurized.
3. Use a cutting torch or sharp cutting tool to tap into the pipe. The pipe opening must be
at least 1.875" in diameter. (Do not attempt to insert the sensor probe through a smaller
hole.)
4. Remove all burrs from the hole. Rough edges may cause flow profile distortions that
could affect flow meter accuracy. Also, obstructions could damage the sensor assembly
when inserting into the pipe.
!
WARNING
All flow meter connections, isolation valves and fittings for cold tapping must have the same or
higher pressure rating as the main pipeline.
5. After cutting, measure the thickness of the cut-out and record this number for
calculating the insertion depth.
6. Weld the flow meter pipe connection onto the pipe.
Make sure this connection is within ± 5°
perpendicular to the pipe centerline.
7. Install the isolation valve.
8. When welding is complete and all fittings are installed, close the isolation valve or cap
the line. Run a static pressure check on the welds. If pressure loss or leaks are detect ed,
repair the joint and re-test.
9. Connect the meter to the pipe process connection.
10. Calculate the sensor probe insertion depth and insert the sensor probe into the pipe as
described on the following pages.