Interlaboratory Studies (ILS): Setting new milestone for refractory testing
Interlaboratory comparisons to validate, benchmark, and improve the accuracy of your refractory testing methods. Coming soon as a new FGF service.
What are Interlaboratory Studies (ILS) and why do they matter for the refractory value chain?
Interlaboratory Studies (ILS), also known as round-robin tests are anonymous proficiency tests for testing laboratories. They enable an objective assessment of the precision, accuracy, and reliability of testing methods by comparing the results from different laboratories. They are essential for quality assurance and accreditation.
Moreover, ILS provide a structured framework for laboratories to collaboratively evaluate and refine testing methods. By analyzing results from multiple labs, inconsistencies or deviations in procedures can be identified and addressed. This process helps:
- Customer Trust: By demonstrating the accuracy and transparency of your test results, you can strengthen your customers' trust in your products and services.
- Harmonize methods: Ensure all laboratories follow the same protocols, reducing variability in results.
- Validate methods: Confirm that a testing procedure is reliable, repeatable, and reproducible across different environments.
- Improve precision: Identify sources of error (e.g., equipment, operator technique) and refine methods to minimize them.
- Establish best practices: Create guidelines or standards (e.g., ISO, DIN, or industry-specific) that define how tests should be conducted to achieve consistent results.
Finally, ILS generate data that can be used to develop Certified Reference Materials (CRM). CRMs are consistent, stable materials with well-defined properties, certified by a technically valid procedure. They serve as:
- Calibration tools: Labs use CRMs to calibrate equipment and verify that their measurements are accurate.
- Quality controls: CRMs allow labs to monitor their performance over time and compare results with other labs.
- Benchmarking: They provide a common reference point for evaluating the accuracy of new methods or materials.
Until now, no interlaboratory studies on refractory products have been open to all actors of the refractory chain value, nor have any certified reference materials been established. FGF addresses this issue and aims to set new milestones for the refractory industry.
How FGF’s Interlaboratory Studies Work
|
Registration |
Sample Preparation |
Testing in Labs |
Data submission |
Statistical Analysis |
Reporting and Insights |
|
Labs sign up via FGF to participate in the ILS. |
Homogeneous samples of refractory bricks will be distributed to the participating labs |
Laboratories perform the relevant test using a standardized method (e. g. CCS) |
Results are submitted to FGF for centralized analysis. |
The data is analyzed for precision, accuracy, and comparability across laboratories. |
Participants will receive a detailed report that includes benchmark data and suggestions for improvement. |
Figure 1: How FGF’s Interlaboratory Studies Work – A Step-by-Step Overview
Frequently Asked Questions
Who Can Participate?
All refractory producers, independent testing laboratories, and refractory product consumers (e.g., steelmakers, foundries). Research institutions and associations are welcome.
Which testing methods will undergo interlaboratory studies?
To begin with, we will consider the Cold Crushing Strength (CCS). The Modulus of Rupture (MoR) and Bulk Density (BD)/Open Porosity (oPo) will follow shortly after.
How often are the interlaboratory tests conducted?
The plan is to hold annual sessions for each method, depending on demand.
Are ILS planned for additional testing methods?
In principle, additional testing methods are possible, depending on demand. We will periodically check to see if there is interest in additional testing methods.
Learn More: Join Our Free ECREF Webinar
📅 Date: June, 23th 2026,
📍 Location: Online Microsoft Teams
💶 Registration fee: free of charge
🔗 Registration: How does the refractory industry benefit from interlaboratory studies (ILS)?
Are you interested in ILS, but the date doesn't work for you? Sign up anyway, you'll receive the presentation and can contact us afterward with any questions.
Agenda:
- I – Introduction to ILS: Basic principles and statistical foundations.
- II – Case studies: Proficiency testing of methods (ReStaR, HMoR, CCS, WST/BT).
- III – New ECREF service: ILS for assessing refractory testing laboratories.
- IV – Q&A with attendees.
Speakers:
- Dr. Kerstin Hauke – Head of Business Development, FGF
- Dr. Erwan Brochen – Research Associate, FGF; Member of the Standardization Committees (ISO/TC 33 - Refractories, CEN/TC 187 - Refractory products and materials)
- Gerhard Urbanek – Former RHI Magnesita; Chair of ISTF/WRA; Expert in ILS and NDT
Register now to secure your spot!