Checklist for Orifice Metering System
Points to check before installation of Orifice Meter after periodic maintenace
Meter Serial No:
Make & Model:
Sr. No
1
1.1
1.2
1.3
Checkpoint
Orifice plate ,profiler and meter tube visually /physically
inspected for
Any physical damage
Cleanliness
Other parameters as applicable like Edge
Sharpness,Flatness, Bevelling, Smoothness etc of orifice
plate.
2
Orifice Plate is installed keeping in mind the flow direction
with proper gaskets installed so that it does not protrude into
pipe bore.
3
Calibrated span of Diff pressure Transmitter, temperature
input and Pressure transmitter reviewed viz a viz operating
conditions.
4
5
6
7
8
Leak Test has been completed.
Flow computer data updation done as per Orifice and Meter
tube Inspection/Calibration certificate.
Joint record with customer/supplier for Orifice Plate dia,
Meter tube dia and other parameters data updation in flow
computer has been maintained.
Flow validation including compressibility factor verification
using standard software carried out.
Meter is sealed at appropriate places so that no tempering
can be done. Seal numbers has been maintained in Seal
Register.
9
Meter is taken in Parallal /Series with other metering stream
as applicable and verified for flow measurement.
10
Flow computer configuration for various other parameters
like alarm setpoints, keypad values etc. reviewed.
11
Finally Flow computer configuration parameters backup has
been taken and record has been maintained.
Observation
Calibration
Certificate No:
Meter Seals Number before undertaking the maintenance activity to be
verified with Seal register. Necessary action to be initiated in case of any
Remark:
discripancy. Seal Nos before and after Maintenance shall be recorded in Seal
Register.