Recording Pipeline Current

Information in the following table (Table 7-3) identifies the fields required for recording pipeline current values.

 

Table 7-3. Recording Pipeline Current

Facility & Current Type	Description
Pipeline Current: IR Drop Test Station	1 Add the following fields in the Test Point Information grid. Enable “activate” fields for use. • Activate Pipeline Current On - mV Drop • Activate Pipeline Current Direction • Pipeline Current Calibration Factor (A/mV): Enter the amps value of the current factor when using the resistance of the pipeline to measure current flow on the pipeline. Enter value as whole number. The value is used in the pipeline current calculation. • Pipeline Current Measurement Ratio (mV/A): Enter the current factor when using the resistance of the pipeline to measure current flow on the pipeline. Enter value as whole number. The value is used in the pipeline current calculation. 2 Add the following fields in the Test Point Inspection grid: • Pipeline Current On (Amps): Enter amps reading for pipeline current measured with rectifier on. • Pipeline Current Direction: Use this field to describe the direction of the current, such as upstream or downstream.
Pipeline Insulator Current: Shunt for Insulated Flange	1 Add the following fields in the Test Point Information grid. Enable “activate” fields for use. • Activate Insulator Current • Insulator Shunt Factor (A/mV) • Insulator Shunt Rating (mV/A) 2 Add the field Insulator Current (Amps) in the Test Point Inspection grid. Use the field Insulator Current (Amps) to enter the amps value of the insulator shunt reading. PCS Axis uses the reading and the value in the field Insulator Shunt Rating (mV/A) to calculate and enter a value in the field Insulator Shunt Factor (A/mV).
Pipeline Insulator P/S	1 Add and enable the field Activate Insulator P/S in the Test Point Information grid. 2 Add the field Insulator P/S in the Test Point Inspection grid. Use the Insulator P/S field to enter a potential reading for the other side of an insulated flange, relative to the soil. This type of reading is also referred to as an “insulator-to-soil” potential reading. If the protection criteria option .85 IRF or 100mV is selected in the field Test Point Protection Criteria, add and enable the field Activate Insulator IRF in the Test Point Information grid and then add the field Insulator IRF (Volts) in the Test Point Inspection grid.
Pipeline Galvanic Current: Shunt for Galvanic Anode	1 Add the following fields in the Galvanic Anode Information grid. Enable “activate” fields for use. • Activate Galvanic Current • Galvanic Anode Shunt Factor (A/mV) • Galvanic Anode Shunt Rating (mV/A) 2 Add the field Galvanic Current (Amps) in the Galvanic Anodes Inspection grid. Use the field Galvanic Anode Current (Amps) to enter the amps value of the galvanic anode shunt reading. PCS Axis uses the reading and the value in the field Galvanic Anode Shunt Rating (mV/A) to calculate and enter a value in the field Galvanic Anode Shunt Factor (A/mV).