Digital radiography solved one problem and quietly created another. Film gave NDE a physical archive: a radiograph in an envelope with a location written on it, readable by anyone with a light box for fifty years. Digital detectors produce better images faster, but they produce them as files, and files raise the questions film never had to answer. What format? Readable by whose software? With what proof of which weld, which technique, which date?
DICONDE is ASTM's answer. The name stands for Digital Imaging and Communication in Nondestructive Evaluation, and it is the industrial adaptation of DICOM, the standard that has governed medical imaging for decades. The bet is simple: medicine already solved long-term storage, interchange, and traceability of diagnostic images at global scale, so NDE should inherit that infrastructure rather than reinvent it. ASTM publishes the base practice and companion standards covering digital radiography, computed radiography, ultrasound, and eddy current data.
What it actually does
DICONDE defines two things that matter to an integrity program.
First, a file format in which the image and its metadata are inseparable. A DICONDE file carries the pixel data together with structured fields for the component identity, the technique, the equipment, the examiner, and the date. The context cannot fall off the way a PDF report detaches from the raw image it summarizes.
Second, a communication protocol, so acquisition systems, review workstations, and archives from different vendors can exchange examinations the way hospital systems exchange studies.
- Vendor independence. An examination acquired on one manufacturer's panel is reviewable in another's software. Your archive is not hostage to the detector vendor you chose in 2020.
- Longevity. Equipment records outlive software products. A format anchored to an ASTM standard with a massive installed base in medicine is the safest bet available for images that must be readable at the vessel's retirement.
- Traceability by construction. The who, what, where, and when travel inside the file, which is precisely what an auditor asks of radiographic records.
Why integrity teams should care
The naive alternative is what most sites actually have: proprietary acquisition files on a shop workstation, exported JPEGs pasted into report PDFs, and the raw data effectively unreachable within a few software generations. That archive answers today's question and fails the ten-year one. Comparing this outage's radiograph of a weld against the last outage's, at full fidelity, side by side, is exactly the comparison an integrity engineer wants, and exports cannot support it.
Practical guidance when specifying digital NDE work:
- Require examinations delivered in DICONDE format, not just report PDFs with embedded snapshots.
- Require the metadata fields you will need, component and weld identity, technique, examiner, populated at acquisition, since retrofitting metadata is reconstruction.
- Archive the DICONDE files against the equipment record, not in a shop folder tree.
The through line is familiar: the image is evidence, and evidence needs identity and custody from the moment of capture. intelliSPEC treats DICONDE examinations as part of the equipment record alongside thickness data and visual findings, so the image sits with the history it belongs to. If your radiographs live on a workstation nobody wants to touch, bring a sample examination to a demo.
