Overview
EN ISO 10893-6:2019 specifies requirements for film-based radiographic X‑ray testing of the longitudinal or helical weld seam of automated fusion arc‑welded steel tubes for detection of imperfections. It is the CEN-endorsed version of ISO 10893-6:2019 and supersedes the 2011 edition. The standard also notes applicability to circular hollow sections and points to ISO 10893-7 as the alternative for digital radiographic testing.
Key topics and technical requirements
- Scope: Film-based radiographic inspection of weld seams on welded steel tubes (longitudinal/helical); applicable to circular hollow sections.
- Test method: X‑ray film technique is required for this part; digital methods are covered in ISO 10893-7.
- Image quality classes: Two image quality levels (Class A - standard sensitivity; Class B - enhanced sensitivity) in accordance with ISO 17636-1.
- Personnel competence: Testing must be performed by certified or qualified NDT personnel (references include ISO 9712, ISO 11484).
- Film processing & image quality: Requirements for film handling, processing and image quality verification reference ISO 11699-1, ISO 19232-1/2, and include film‑side positioning and processing controls.
- Radiograph coverage: Adjacent films must overlap by at least 10 mm to ensure continuous weld coverage; overlaps shall be proved with mechanical marks.
- Identification & location: Lead markers and permanent or local markings are required to identify weld position and radiograph sections.
- Safety: Explicit warning on X‑ray/gamma‑ray hazards; compliance with applicable radiation safety regulations is mandatory.
- Reporting and evaluation: Clauses address classification of indications, acceptance limits, test reports and annexed examples of imperfection distributions.
Practical applications
- Quality control of welded steel tube production (manufacturers, mill inspection).
- Incoming inspection or third‑party verification for tube suppliers and purchasers.
- Inspection of circular hollow sections where film radiography is preferred.
- Use cases in industries requiring reliable weld seam integrity data: structural, mechanical, pressure components and pipeline-related tubing (where film radiography is specified).
Who should use this standard
- Tube manufacturers and fabricators producing longitudinally or helically welded steel tubes.
- NDT managers, radiographic technicians and Level 3 supervisors responsible for radiographic procedures.
- Third‑party inspection bodies, purchaser quality engineers and compliance teams specifying acceptance criteria.
Related standards
Keywords: EN ISO 10893-6:2019, radiographic testing, weld seam, steel tubes, film-based radiography, non-destructive testing (NDT), image quality.
