Pulsed Eddy Current Testing



EIWAA Oil and Gas Provides a precise and non-destructive inspection method for detecting corrosion under insulation Pulsed Eddy Current (PEC) Inspection. PEC inspection uses a coil to generate for pulsed electromagnetic field with the conductive material under the insulation. Pulsed Eddy Current (PEC) is an NDT inspection service for inspecting carbon steel pipes and vessels, without contacting steel. Pulsed eddy current inspection can measure variations of thickness through any non-conductive and non-magnetic material between the sensor and the steel surface. Pulsed eddy current is measured through air, insulation material, concrete, plastics, coatings, paint, seawater, and marine growth.
Pulsed eddy current inspection measures the percentage variation of wall thickness through the insulation. Pulsed eddy current inspection readings depend on the thickness of the steel and the electromagnetic properties of the steel. Where possible, the Pulsed eddy current inspection readings are calibrated relative to an ultrasound reading at an accessible location. Supplementary NDT Inspection Services of Thermographic survey or Thermal imaging to detect temperature differences indicating heat loss or moisture accumulation.


Like Pulsed Eddy current Inspection services in corrosion under insulation, EIWAA oil and gas services provide advanced NDT Inspection of PAUT Inspection, Magnetic flux leakage etc. Surface preparation is easy there is no need to remove deposits, corrosion or paint coatings. Pulsed eddy current inspection can also be measured through corrosion products if there is a gap between the PEC probe and the corrosion product of 20mm. Pulsed eddy current inspection can occur through aluminum and stainless-steel insulation covering heat exchangers and boilers. Pulsed eddy current Inspection services in Saudi Arabia are used for piping and pipeline inspection and Storage tank Inspection at Piping/Storage tank terminals.

Oil and Gas Services

CUI Inspection for corrosion detection, corrosion monitoring and asset integrity management for heat exchangers and boilers

Power Plant

PEC Inspection Services for steam boiler tubes and steam turbine inspection for crack identification and thinning.

Offshore Services

Non-intrusive inspection services of Pulsed eddy current inspection for subsea pipelines and platform structures.


Corrosion under insulation inspection services for high-temperature pipelines and structures


Pulsed Eddy Current (PEC) inspection is a widely used non-destructive testing inspection service and in various industries.

  • API 510: Inservice Inspection of Boilers and Heat exchangers includes guidelines for corrosion under insulation inspection of boiler tubes.
  • ASME PTC 25: Inservice inspection of Power Piping for the piping systems, including corrosion under insulation inspection.
  • ASME B31.3: Process Piping for the design, fabrication, installation, examination, and testing including Pulsed eddy current inspection requirements.
  • ASTM E543: Radiographic examination techniques and corrosion under insulation inspection.
  • EN ISO 22405: Non-destructive testing – Eddy current examination – Acceptance levels,” provides requirements and methods for the acceptance levels for Pulsed eddy current inspection.

CUI Inspection covers the scope of identifying the wall thickness inspection at insulated surfaces where moisture and corrosive substances accumulate. This can lead to the formation of rust, corrosion, or erosion of the underlying metal and cause leakages.

  • Visual inspection: Visual inspection of insulation were signs of damage or moisture accumulation in insulated areas.
  • Infrared thermography: Thermal imaging or thermal monitoring to detect temperature differences due to heat loss or moisture accumulation.
  • Ultrasonic testing: Non-destructive testing and inspection to detect welding defects under insulation and piping systems.
  • Pulsed Eddy Current (PEC) inspection: NDT Inspection which detects wall thickness or corrosion under thin layers of insulation.
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