Radiographic Testing (RT)
Radiographic Testing (RT)
Radiography Testing (RT) is a cornerstone non-destructive testing method that uses penetrating radiation (X-rays or gamma rays) to produce images of internal features in materials and welds. At Assessfie, our radiographic inspections reveal hidden flaws — such as cracks, voids, inclusions, lack of fusion, and corrosion — without cutting, dismantling, or damaging critical components. We combine experienced technicians, calibrated equipment, and rigorous procedures to deliver reliable imagery and actionable reports for the most safety-critical assets.
How Radiography Works
- A radiation source is positioned to transmit energy through the test object.
- A detector (film, phosphor plate, or digital detector) records the transmitted radiation.
- Variations in absorption create an image that highlights internal discontinuities and geometric features.
- Trained RT interpreters evaluate the radiograph against acceptance criteria and generate a clear report with recommendations.
Technologies We Use
- Conventional Film Radiography
- Computed Radiography (CR)
- Digital Radiography (DR)
- Portable X-ray and Gamma sources for field and offshore inspections
- Radiography Film Interpretation
Radiography Applications in the Oil & Gas Industry
Radiography is widely used across upstream, midstream, and downstream operations to protect people, assets, and the environment. Common oil & gas applications we support include:
Pipeline Integrity — Girth weld inspection on onshore and offshore pipelines
Pressure Vessels & Storage Tanks — Shell-to-head welds, nozzle attachments, and high-pressure vessel welds
Heat Exchangers & Boilers — Tube-to-tubesheet welds, channel welds, and leak investigation
Valves, Flanges & Piping Fittings — Welded joints in sour-service and high-temperature lines
Subsea & Offshore Structures — Riser welds, structural members, and piping assemblies
Fabrication Quality Control — Shop-level acceptance testing for skids, manifolds, and structural components
Corrosion and Erosion Assessment — Detecting internal wall loss and thinning
Weld Repair Verification — Post-repair radiographs to confirm defect removal and quality
Standards & Regulations
Our Radiography Testing services strictly follow international codes, industry practices, and personnel qualification standards to ensure safety, accuracy, and global acceptance.
International Standards
- ISO 5579 — Rules for radiographic examination of metallic materials using X-rays and gamma rays
- ISO 17636-1 & 17636-2 — Radiographic testing of welds using film and digital detectors (CR/DDA)
- ISO 11699-1 & 11699-2 — Classification of industrial radiographic film & film processing control
- ISO 19232-1 — Image quality of radiographs using wire-type image quality indicators (IQIs)
ASTM Standards
- ASTM E94 — Recommended practices for radiographic testing
- ASTM E1815 — Classification of film systems for industrial radiography
- ASTM E1030 — Radiographic examination of metallic castings
- ASTM E192-1 — Requirements for image quality indicators (IQIs)
Industry-Specific Standards
- API 1104 — Radiographic testing of welding pipelines and related facilities
- API 5L — Standards for line pipes
- API 5CT — Standards for casing and tubing
- API 570 — In-service piping inspections
Personnel Qualification Standard
- SNT-TC-1A — Widely adopted standard for qualification and certification of NDT personnel
