Overview
EN ISO 10893-9:2011 - Non-destructive testing of steel tubes, Part 9 - defines requirements for automated ultrasonic testing (AUT) of strip/plate used to manufacture welded steel tubes for the detection of laminar imperfections (e.g., laminations, delaminations). It applies to testing carried out in the pipe mill before or during production and can also be used, by agreement, for strips/plates used to make circular hollow sections or for SAW tubes after seam welding. This European adoption of ISO 10893-9:2011 supersedes EN 10246-15:2000.
Key Topics
- Scope & techniques
- Automated ultrasonic pulse-echo or ultrasonic through-transmission testing in the flat strip/plate form.
- Scan coverage and spacing
- Defines minimum coverage and maximum allowed gap between adjacent scanning tracks for three acceptance levels:
- U1: minimum coverage 20% - max gap 100 mm
- U2: minimum coverage 10% - max gap 150 mm
- U3: minimum coverage 5% - max gap 200 mm
- Oscillating probe techniques require half the stated minimum coverage.
- Edge testing
- Longitudinal edges must be 100% ultrasonically tested over at least 15 mm plus any additional edge material to be removed prior to welding.
- Personnel & competence
- Testing shall be performed by trained operators qualified according to ISO 9712, ISO 11484, or equivalent, and supervised by competent personnel (employer-authorized and level 3 oversight as required).
- Reference standards & calibration
- Use of reference standards and reference samples for calibration and verification; equipment calibration, routine checks and acceptance criteria are specified.
- Documentation
- Requirements for test reports, acceptance criteria and procedures for sizing laminar imperfections (including an annex for manual ultrasonic sizing).
Applications
- Quality control and defect screening of strip/plate prior to welded tube manufacture to prevent laminar defects from propagating into finished tubes.
- In-line inspection in pipe mills for welded tube production (ERW/LSAW/SSAW) and for circular hollow section manufacture.
- Use by: tube manufacturers, steel mills, NDT service providers, quality assurance/quality control (QA/QC) engineers, and third‑party inspectors who specify or verify ultrasonic laminar-detection programs.
- Practical benefits: early detection of lamination defects, reduced scrap and rework, improved weld integrity and end-product reliability.
Related Standards
- ISO 10893 series (other parts cover AUT of tubes, radiographic testing, eddy-current, flux leakage, thickness testing, etc.)
- ISO 5577 (NDT ultrasonic vocabulary)
- ISO 9712 (qualification and certification of NDT personnel)
- ISO 11484 (employer qualification system for NDT personnel)
Keywords: EN ISO 10893-9:2011, automated ultrasonic testing, laminar imperfections, strip/plate, welded steel tubes, non-destructive testing, NDT, ultrasonic pulse echo, through-transmission, ISO 9712.
