Robotic Precision and Metallurgical Safety in EN 14399-1 Assemblies
High-strength structural bolting systems are critical components in modern steel construction. In large-scale infrastructure projects, reliability begins with the smallest elements — fasteners. Combining robotic manufacturing, advanced galvanizing technologies, and certified testing procedures, Kaleliler delivers EN 14399-1 compliant high-strength structural bolting assemblies for demanding global projects.
Robotic Production: Consistency at Scale
At Kaleliler, quality is engineered into every stage of production. The company operates state-of-the-art robotic production lines that ensure dimensional accuracy and process stability.
Through advanced automation, Kaleliler achieves:
- Zero-Error Geometry: Robotic precision guarantees that every bolt, nut, and washer meets strict European dimensional tolerances.
- Consistent Performance: Automated systems maintain uniform quality across high production volumes, supporting major international infrastructure projects.
- Controlled Process Parameters: Critical parameters such as temperature are carefully monitored to ensure stable and homogeneous heating during the hot forging process.
Advanced Galvanizing and Hydrogen Embrittlement Prevention
One of the most critical challenges in high-strength (10.9 grade) bolting systems is Hydrogen Embrittlement (HE). To address this risk, Kaleliler operates an in-house Hot-Dip Galvanizing (HDG) facility designed to preserve both coating integrity and mechanical performance.
Key elements of the process include:
- Ultrasonic Surface Preparation: High-frequency ultrasonic cleaning significantly reduces the need for aggressive acid pickling, minimizing hydrogen absorption during surface preparation — a critical factor for 10.9 grade fasteners.
- Robotic Galvanizing Control: Immersion times and temperature levels are precisely managed through robotic systems, ensuring uniform coating thickness while maintaining the mechanical properties of the steel.
Certified Quality and Comprehensive Testing
All EN 14399-1 assemblies produced by Kaleliler are CE marked and fully compliant with relevant European standards. The company’s accredited laboratories conduct comprehensive validation procedures, including:
- Suitability Testing (K-Class): Verification of torque-preload characteristics for structural safety.
- Mechanical Testing: Tensile, yield, and hardness analyses.
- Coating Verification: Measurement of coating thickness and corrosion resistance performance.
A Global Strategic Partner
Approximately 40% of Kaleliler’s production is exported directly, with Germany and the broader European market representing primary destinations.
The company also serves as a solution partner for leading Turkish contractors in major international projects. Kaleliler bolting systems have been used in landmark structures such as Istanbul Airport, Osmangazi Bridge, BMW Factory in Hungary, Kuwait Airport Terminal II Building, and Barcelona Stadium.
Why Kaleliler?
- Certified Safety: Full CE marking and compliance with EN 14399-1 and EN 15048-1 standards.
- Technological Capability: Robotic manufacturing and ultrasonic cleaning technologies.
- Proven International References: Trusted by European clients and global contractors.
Kaleliler: Where Robotic Precision Meets Structural Integrity.
