Overview
EN ISO 10675-2:2021 (Corrected 2022-02) defines acceptance levels for indications from imperfections in aluminium butt welds detected by radiographic testing. Published by CEN/ISO, it applies primarily to aluminium and its alloys and assumes radiography is carried out in accordance with ISO 17636‑1 (RT‑F) or ISO 17636‑2 (RT‑S, RT‑D). Where agreed by parties, the acceptance levels may also be applied to other weld types (e.g., fillet welds) or materials.
Key topics and technical requirements
- Scope & purpose: Sets numerical acceptance criteria and limits for internal indications (e.g., gas pores, porosity, clustered porosity, linear porosity, lack of fusion, cracks) in aluminium butt welds detected by radiography.
- Radiographic technique linkage: Requires use of radiographic classes A or B per ISO 17636‑1/‑2 depending on the selected weld quality level (RT‑F for film, RT‑S for radioscopy, RT‑D for digital detectors).
- Acceptance levels: Defines size limits and area/percentage thresholds by quality level and material thickness. Example parameters included in the standard:
- Maximum individual pore diameter rules (e.g., d ≤ 0.4·s, max 6 mm for lower quality; tighter limits for higher quality levels).
- Total area/percentage of porosity within any 100 mm testing length (A ≤ x %), varying by thickness and acceptance level.
- Evaluation rules: Adjacent imperfections separated by less than the major dimension of the smaller imperfection are treated as a single imperfection. Annexes provide guidance on radiographic limitations, example calculations of projected areas, and summation methods.
- Pre‑ and post‑inspection: Accessible welded areas should be visually inspected (ISO 17637) and evaluated before radiographic testing. Quantification of some surface imperfections may require specific procedures.
Applications and who uses it
This standard is used for:
- Quality control and acceptance criteria in fabrication of aluminium structures (aerospace components, transport bodies, pressure equipment, architectural and marine welding).
- Preparation of welding specifications, inspection procedures, and supplier contracts.
- NDT professionals, welding engineers, welding inspectors, QA/QC managers, and regulatory auditors responsible for radiographic testing and weld acceptance.
Practical uses:
- Define contractual acceptance levels for internal weld imperfections.
- Select appropriate radiographic technique (RT‑F/RT‑S/RT‑D) and class.
- Standardize reporting and decision-making for repair or rejection of aluminium welds.
Related standards
Keywords: EN ISO 10675‑2:2021, radiographic testing, NDT, aluminium welds, acceptance levels, porosity, RT‑F, RT‑S, RT‑D, welding inspection.
