Onicon F-2600 Manual de usuario descargar pdf (Pagina 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 ow before installing the ow 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. Conrm that the installation site meets the minimum upstream and downstream pipe

diameter requirements. See Figure 4.

2. Turn off the ow 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 ow prole distortions that

could affect ow meter accuracy. Also, obstructions could damage the sensor assembly

when inserting into the pipe.

WARNING

All ow meter connections, isolation valves and ttings 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 ow 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 ttings are installed, close the isolation valve or cap

the line. Run a static pressure check on the welds. If pressure loss or leaks are detected,

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.

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Onicon F-2600 Manual de usuario Pagina 25