BonPEC

Description

It is a non-intrusive electromagnetic technique based on Pulsed Eddy Current which allows detection, measurement and monitoring of corrosion in low alloyed carbon steel pipes and vessels through their insulations, coatings, paints, concrete fireproofing or marine growth. The technology does not require direct contact, cleaning or special and specific preparation of the surface of the object to be examined, therefore no costly and unnecessary insulation removal is required to perform the PEC examination with a considerable cost saving for the client.

PEC is the efficient and cost effective solution for the examination of insulated and corroded components and parts in the on- and offshore industry and in the energy sector.

Corrosion Under Insulation (CUI), Corrosion Under Fireproofing (CUF) and Flow Accelerated Corrosion (FAC) as well as Well Integrity are typical PEC successful applications, solutions and benefits. PEC performance is effective also for semi-contact measurements carried out with dirty, rough, cold and high temperature objects. In general PECT can perform thickness assessment on Carbon Steel where there is a stand off that means ultrasonic thickness measurement is not applicable.

Probes

Depending on the lift-off and the average wall thickness of the object being inspected, there is a range of probes to choose from in order to optimize the reliability of the results. For a large lift-off a large probe is needed. Two probes are available as standard, P0.5 and P1.0, with other options available.

The applicable range of each probe depends on the material properties and measurement geometry of the target, but most importantly the lift-off and average wall thickness

The above diagrams show both a probe selection criteria for a carbon steel flat plate and a 2” outer diameter carbon steel pipe, based on avergae wall thickness and lift-off.

BonPEC probes are designed to minimize false readings, hence they are insensitive to metal objects near the probe, except for the object that is right below it. Due to magnetic field focusing, the probes are (within boundaries) insensitive to lift-off change, angle mis-match or variations of sheeting thickness. These properties are all important for field measurements, reducing false calls and increasing effectiveness of data interpretation.

Software

BonPEC software has been developed based on the way a typical NDT survey is performed. Initially one needs to know what needs to be investigated, which is represented by client and object parameters.

Important parameters are the type of object (pipe, plate or bend), the nominal wall thickness, the lift-off and the of cladding used etc. Based on this information and the experience of the operator, a suitable probe is selected and a suitable scan is defined. The BonPEC program gives tools to inspect, check, evaluate and report the measurement data.

Software features

Fast data collection
Direct real-time interpretation and results;
Digitally stored data.
User-friendly operation (touchscreen)
Advanced PEC signal presentation feature.
Advanced PEC data analysis and evaluation algorithms (footprint minimum WT value etc.)
Advanced reporting features (Auto report generation, Graphs, 3D result projection on object model/photo etc.)
In-service corrosion monitoring.
Interface language user dependent.
Operator level dependent software and training.