PMAC CP System
C.P. (CATHODIC PROTECTION) SURVEY

Process Measurement and Control Systems Ltd (PMAC) offer a complete Offshore Cathodic Potential (CP) Inspection service to ensure the integrity of pipelines and structures. This service is based on proven technology with further developed hardware and software to meet industry and legislative requirements.

Ensuring the integrity of oil and gas pipelines and structures requires specialist monitoring with sophisticated hardware and software. This is an area where PMAC have invested heavily, offering the industry proprietary technology with enhanced data acquisition and management software to meet these demands. The PMAC Acquisition software, used in conjunction with PMAC’s processing software and CP experience, offers a choice of data reporting and interpretation methods, to meet the specific requirements of the client.

Regulatory authorities require constant evaluation/auditing of CP systems to ensure structural integrity. CP Surveys allow a system’s ability to resist/avoid corrosion to be monitored, and any corrosion issues to be remedied before the onset of major failure. PMAC also manage an extensive database of historical data which can be used to monitor CP trends to identify areas on interest throughout the design life of CP systems.

Based on the use of the Twin Cells (TC) probe technique, the system gives real time data measurement for both subsea pipelines and structures. Continuous CP and field gradient (FG) readings can be logged simultaneously, so PMAC are able to determine the anode current output and calculate the remaining life of installed anode systems*.

The PMAC Subsea Digitiser utilises the latest technology adding increased reliability. With selectable multiple outputs of RS232 and RS485, and configurable baud rates, the bottle meets most operational requirements. The electronic housing and choice of power supply options allow the electronics bottle to be mounted on all ROVs, or even on deck (topside) if necessary.