Overview
EN ISO 19232-1:2013 - Non-destructive testing - Image quality of radiographs - Part 1 specifies the device and method for determining radiographic image quality value using wire-type image quality indicators (IQIs). It defines the IQI construction, wire series, designation, material choices, marking, placement and the procedure for reading the image quality value from a radiograph. This part is the wire-type complement to the ISO 19232 series for radiographic image quality assessment.
Key topics and requirements
- Scope: A device and method to determine image quality of radiographs using wire-type IQIs.
- IQI construction:
- Based on a series of 19 wires (W1 to W19) of specified nominal diameters and tolerances.
- IQIs are assembled as seven consecutive wires from overlapping ranges (W1–W7, W6–W12, W10–W16, W13–W19) with wire lengths of 10 mm, 25 mm or 50 mm.
- Designation and marking:
- Written designation format e.g. IQI ISO 19232-1 - W 10 FE-25 (wire number, material symbol, length).
- IQIs must be marked with the thickest wire number, wire material letters (e.g. FE, CU, TI, AL), and ISO identification.
- Materials:
- Wires are made from a single material per IQI and embedded in a protective covering that does not affect image quality.
- Recommended wire materials include copper (CU), steel/iron (FE), titanium (TI) and aluminium (AL) for matching absorber properties of test objects.
- Selection and placement:
- Select IQI wire material and wire range to match the material under test and expected image quality value.
- Place the IQI on the side facing the radiation source (or adjacent to the detector with an “F” marker on the radiograph).
- View radiographs under conditions specified in ISO 5580.
- Conformity:
- Conversion and cross-reference:
- Annex A gives guidance for converting ASTM E747-04 wire identities to ISO wire IQI numbers.
Applications and users
EN ISO 19232-1:2013 is used to objectively quantify radiographic image quality and is relevant for:
- NDT/radiography technicians and radiographers
- Quality assurance and inspection engineers
- Suppliers and manufacturers of IQIs and radiographic equipment
- Inspection authorities and certification bodies
Typical industry applications include weld inspection, castings and component radiography in sectors such as oil & gas, aerospace, power generation, automotive and construction where reliable radiographic image quality assessment is required.
Related standards
- ISO 19232 series (other parts):
- Part 2: step/hole-type IQIs
- Part 3: image quality classes
- Part 4: experimental evaluation and image quality tables
- Part 5: image unsharpness with duplex wire IQIs
- ISO 5580 (radiographic viewing illuminators)
- ISO/IEC 17050-1 (supplier’s declaration of conformity)
Keywords: EN ISO 19232-1:2013, image quality of radiographs, wire-type image quality indicators, IQI, non-destructive testing, radiographic image quality.