Introduction to IQIs in Radiography (RT)
Industrial Radiography Testing (RT) is a vital NDT method used across oil & gas, fabrication, power generation, pipelines, and manufacturing industries. Companies like Total NDE Services – Pakistan provide advanced third-party inspection and NDT services nationwide, ensuring component integrity and operational safety.
A critical component of RT is verifying radiographic sensitivity, which is done using IQIs (Image Quality Indicators) — also known as radiographic penetrameters.
Using correct IQIs ensures your radiographs meet international standards such as ASTM, ASME, API, ISO, and enhances the reliability of weld inspections, castings, and structural components.
What is an IQI? (Image Quality Indicator)
An IQI is a standardized device used to:
- Check radiographic sensitivity
- Validate image quality
- Confirm compliance with ASTM E747, ASME V, and API 1104
- Detect the smallest required flaw size
- Ensure weld radiography and casting radiography is performed correctly
Total NDE Services Pakistan uses ASTM-approved IQIs for all Radiography Testing (RT) inspections throughout Pakistan including Lahore, Karachi, Islamabad, Multan, Faisalabad, Sialkot, and Peshawar.
ASTM E747 Wire-Type IQIs — 02A & 02B Explained
ASTM E747 classifies wire-type IQIs by material type. The two most commonly used for aluminum, titanium, plastics, and low-density materials in Pakistan’s industrial radiography sector are:
✔ IQI Type 02A (Aluminum Wire IQI)
✔ IQI Type 02B (Aluminum Wire IQI)
Both are widely used in pipeline radiography, aluminum welding radiography, aerospace components, fabrication inspection, and pressure parts inspection.
IQI 02A – Aluminum Wire IQI (ASTM E747)
Common Keywords:
Aluminum Radiography Pakistan, Aluminum Weld RT, ASTM E747 IQI 02A, Industrial Radiography Lahore.
Applications
- Aluminum weld RT (TIG/MIG)
- Aerospace components
- Heat exchanger tubing
- Thin to medium aluminum plates
- Automotive aluminum parts
- Fabrication & structural aluminum welds
Material Thickness Range
Approx. 4.00 mm to 12.5 mm, depending on wire size.
IQI 02B – Aluminum Wire IQI (ASTM E747)
Common Keywords:
Aluminum Radiography Pakistan, Composite RT, High-Sensitivity Radiography, IQI 02B ASTM E747.
Applications
- Aluminum weld RT (TIG/MIG)
- Aerospace components
- Heat exchanger tubing
- Thin to medium aluminum plates
- Automotive aluminum parts
- Fabrication & structural aluminum welds
Material Thickness Range
Approx. 12.5 mm to 40.5 mm.
02A vs 02B — Quick Comparison for RT Inspectors
| Feature | IQI 02A | IQI 02B |
|---|---|---|
| Material | Aluminum | Aluminum |
| Sensitivity | High | High |
| Range | Thin sections | Medium Thicknesss |
| Application Area | Aluminum welding RT | Aluminum welding RT |
| Used by | Pipeline & fabrication industries | Pipeline & fabrication industries |
Total NDE Services uses both 02A and 02B based on project specifications under API 1104, ASME Section V, and client QCPs.
Why IQIs Are Essential in Radiography Testing (RT)
Using correct IQIs:
- Ensures RT film/DR image meets code requirements
- Validates technique sensitivity
- Confirms ability to detect real weld/casting defects
- Increases reliability of third-party inspection reports
- Enhances safety in oil & gas and industrial facilities
For this reason, IQIs are mandatory in almost all RT procedures prepared by Total NDE Services Pakistan.
Conclusion: Choosing the Right IQI for NDT Radiography
Whether performing:
- Pipeline radiography in oil & gas
- Aluminum weld inspection
- Pressure vessel RT
- Casting inspection
- Aerospace component radiography
- Fabrication NDT
Selecting the correct IQI (02A or 02B) ensures high-quality results.
Total NDE Services Pakistan uses ASTM E747-compliant IQIs to deliver accurate and reliable RT inspections across all industrial sectors.
