ISO 10893-2:2011

Overview - ISO 10893-2:2011 (Automated eddy current testing)

ISO 10893-2:2011 is an international standard that specifies requirements for automated eddy current testing of seamless and welded (except submerged arc-welded) steel tubes to detect imperfections. It applies to tubes with an outside diameter ≥ 4 mm and can also be applied to hollow sections. The standard covers test techniques, equipment, calibration with reference tubes, operator qualifications and acceptance/reporting requirements for routine production inspection.

Key topics and technical requirements

• Scope & timing: Inspection is normally performed after completion of production operations (rolling, heat treatment, forming, straightening, etc.). Tubes must be sufficiently straight with clean surfaces for valid testing.
• Test techniques: Recognized automated/semi-automated techniques include:
  • Concentric coil (full peripheral) - limited to ø180 mm (ø250 mm for E4H).
  • Fixed or rotating probe / pancake coil (full peripheral) - no maximum diameter restriction; primarily detects external surface-breaking defects.
  • Segment coil - used for weld-seam inspection or full-body scanning (limits: ø219.1 mm for 2×180° coils, ø508.0 mm for 4×100° coils).
• Operating parameters: Relative speed during scanning shall not vary by more than ±10 %.
• Reference tubes & calibration: Calibration uses reference tubes or samples with drilled holes or notches. Reference tubes should match diameter, wall, surface finish and delivery condition of production tubes; specific reference arrangements are defined for each technique.
• Equipment features: Automated classification (acceptable/suspect), triggers/alarms and marking/sorting systems are required.
• Personnel: Operators must be qualified per ISO 9712, ISO 11484 or equivalent; NDT operations authorized by a Level 3 individual.
• Limitations: Annex A provides guidance on eddy current limitations (e.g., sensitivity decreases with depth; technique-specific limits).

Practical applications

• Inline quality control on tube production lines (seamless and welded, excluding SAW).
• Routine inspection of structural, mechanical and pressure-component tubes where detection of surface and near-surface imperfections is required.
• Pre-shipment acceptance testing and sorting of suspect lengths for repair or rejection.
• Integration into automated mills, testing stations and third-party NDT services.

Who uses ISO 10893-2:2011

• Tube manufacturers and mill quality managers
• NDT engineers and inspection service providers
• Procurement and specifications engineers specifying acceptance criteria
• Third-party inspectors and certification bodies involved in tube quality control

Related standards

• ISO 10893 series (Parts 1, 3–12) - related NDT methods for steel tubes (electromagnetic, ultrasonic, radiographic, penetrant, magnetic particle).
• ISO 9712 and ISO 11484 - personnel qualification and employer qualification systems for NDT.

Keywords: ISO 10893-2:2011, eddy current testing, non-destructive testing (NDT), steel tubes, automated eddy current, reference tube, coil techniques, tube inspection.