ISO 10332:2010

Overview - ISO 10332:2010 (automated ultrasonic testing for steel tubes)

ISO 10332:2010 specifies requirements for automated ultrasonic testing (AUT) of seamless and welded (except submerged arc-welded) steel tubes to verify hydraulic leak‑tightness. The standard focuses on the detection of predominantly longitudinal imperfections using shear‑wave ultrasonic techniques (single‑element or phased‑array) and, where applicable, Lamb‑wave testing at the manufacturer's discretion. It applies to tubes with outside diameter (OD) ≥ 10 mm and OD-to-thickness ratio ≥ 5.

Key topics and technical requirements

• Scope & applicability
  • Seamless and welded steel tubes (SAW excluded), OD ≥ 10 mm, OD/thickness ≥ 5.
  • Detects mainly longitudinal defects; Lamb‑wave optional.
• Ultrasonic techniques & parameters
  • Shear‑wave frequency: 1 MHz to 15 MHz.
  • Lamb‑wave frequency (if used): 0.3 MHz to 1 MHz.
  • Maximum transducer width for longitudinal defect detection: 25 mm.
  • Maximum active aperture for phased‑array/Lamb techniques: 35 mm.
• Scanning and coverage
  • Tubes and transducer assembly moved relative to each other to scan the full surface; scanning in two opposing beam directions unless otherwise agreed.
  • Relative speed variation during testing limited to ±10%.
  • Untested short end lengths handled per product standard (see Annex A).
• Reference standards & calibration
  • Use of reference tubes containing calibrated notches or drilled reference holes for AUT calibration.
  • Reference notch: “N” type, width ≤ 1.0 mm, depth = 12.5% of wall thickness (min 0.5 mm, max 1.5 mm) with ±15% tolerance, length > single‑transducer width (max 50 mm).
  • Reference hole diameters limited by OD (specified in the standard’s table).
  • Equipment calibrated at the start of each cycle (e.g., three consecutive reference passes); calibration checked at least every 4 hours, on operator change, and at start/end of runs.
  • Trigger/alarm levels set using internal/external reference signals; equipment must automatically classify tubes as acceptable or suspect and support marking/sorting.
• Personnel
  • Operators and supervisors must be qualified per ISO 9712, ISO 11484 or equivalent.

Applications - who uses ISO 10332:2010

• Tube manufacturers and mill inspection teams for production quality control and hydraulic leak‑tightness verification.
• NDT service providers performing automated ultrasonic inspection of tubing used in pressure, hydraulic, and structural applications.
• Purchasers and inspection authorities specifying acceptance criteria and inspection procedures in procurement contracts.
• Engineering and quality teams ensuring compliance with NDT best practices for longitudinal defect detection.

Related standards

• ISO 5577 - Ultrasonic inspection vocabulary
• ISO 9712 - Qualification and certification of NDT personnel
• ISO 11484 - Employer qualification system for NDT personnel

Keywords: ISO 10332:2010, automated ultrasonic testing, AUT, non‑destructive testing, NDT, steel tubes, hydraulic leak‑tightness, shear‑wave, phased‑array, Lamb‑wave, reference tube, calibration.