ASTM E94 Standard Guide for Radiographic Examination
ASTM E94 is the standard guide for radiographic examination using industrial X-ray and gamma-ray sources, covering exposure technique, IQI selection, radiation safety, and image quality verification.
Definition
ASTM E94 is a foundational North American RT standard often referenced by ASME and API codes. It defines procedural requirements but does not specify acceptance criteria, which are given by the construction code.
Related terms
- ASTM E165 Liquid Penetrant Examination — ASTM E165 is the standard practice for liquid penetrant testing, defining Type I (fluorescent), Type II (visible) penetrants, and Methods A (water-washable), B (post-emulsifiable lipophilic), C (solvent-removable), D (post-emulsifiable hydrophilic), and develo
- ASTM E1417 Liquid Penetrant Testing — ASTM E1417 is the standard practice for liquid penetrant testing, used principally for aerospace and other high-criticality applications, specifying tighter process controls than ASTM E165.
- ASTM E1444 Magnetic Particle Testing — ASTM E1444 is the standard practice for magnetic particle testing of aerospace and other high-criticality components, specifying tighter process control than ASTM E709 — including daily system performance checks and verified UV-A intensity.
- Radiographic Testing (RT) — Radiographic Testing (RT) is an NDT method that uses X-rays or gamma rays to create a permanent image of the internal structure of a component on film or a digital detector, revealing porosity, cracks, inclusions, and other volumetric defects.
More standard terms
ASME Section V · ASME Section VIII · ASME Section IX · ASME Section XI · ASME B31.1 Power Piping · ASME B31.3 Process Piping · ASME B31.8 Gas Transmission and Distribution Piping · ASME B31.4 Liquid Pipelines · API 510 Pressure Vessel Inspection Code · API 570 Piping Inspection Code
Where this comes up in practice
Terms like this one appear in three places that matter commercially: the written practice that governs how your personnel are qualified, the procedures and technique sheets that define how an examination is actually performed, and the evidence an auditor or client asks for when they want to know why an inspection was accepted. Getting the terminology right is the easy part; being able to produce the qualification record, the calibration traceability and the procedure revision that applied on the day of the inspection is the part that decides audits.
Atlantis NDT provides NDT training and certification against ASNT SNT-TC-1A and ISO 9712, ASNT Level III consulting for written practices and procedure approval, inspection management software that holds qualification, calibration and procedure-revision evidence in recoverable form, and an asset integrity platform that binds inspection results to the asset they describe. Browse the full NDT glossary or ask a Level III directly.