“EVCON TURBO” Certification for Quality TMT bars
Ensuring Quality TMT Steel Bars: Identifying Reliable Producers
Thermo Mechanically Treated (TMT) steel bars undergo a unique metallurgical process that imbues them with superior properties such as weldability, strength, ductility, and bendability, meeting stringent international quality standards. Government agencies, public and private companies face significant challenges in procuring quality TMT bars, especially in larger diameters compliant with Bureau of Indian Standards (BIS) norms. Many consumers, lacking knowledge of TMT bar mechanical properties, often fall victim to local dealers who source and sell inferior quality bars from mills producing substandard products.
In surprise quality audits for TMT bars of Fe 550 grade and above, specifically in the 20 mm to 40 mm range, over 80% of Indian rolling mills fail to meet established quality norms. To ensure the durability and reliability of construction projects, it is crucial to procure TMT bars only from certified producers regularly audited by accredited agencies.
The Technology Accreditation Certificate for the “EVCON-TURBO” process is specifically tailored for rolling mills in India, addressing their unique requirements while ensuring product quality compliant with BIS standards as per IS: 1786-85 and subsequent amendments. This certification is issued by a government-approved entity responsible for conducting rigorous quality audits and certifying producers manufacturing bars of grade Fe 500, Fe 550 & Fe 550 D with a minimum elongation of 14% up to 40 mm.

The quality audit process includes meticulous inspections:

1. Visual inspection of rolled TMT bar samples throughout the audit period to verify compliance with specified tensile strength, including yield strength and elongation.
2. Evaluation of the TMT system's monitoring infrastructure, encompassing instruments, panels, and automation. This inspection ensures the accurate reading, display, and control of critical parameters such as billet chemistry, soaking temperature, cooling profile from furnace exit to cooling bed entry, bar temperature at cooling bed, water cooling duration in microseconds, inlet water conditions (temperature, flow, pressure), and control systems maintaining consistent temperature variance of bars from billet start to finish, among others.
3. Based on the above inspections, issuance of certificates detailing the achieved grades for each TMT bar section.
4. Conducting periodic quality audits to monitor the operational performance and maintenance of the entire TMT system.

This comprehensive audit and certification process guarantee that TMT bars produced under the “EVCON-TURBO” process adhere to the highest quality standards, ensuring reliability and performance in construction applications

The audit serves several critical purposes:

1. Quenching Equipment Inspection:
   • Inspect and service quenching equipment to ensure optimal performance
   • Reset nozzles if necessary to maintain proper functionality
2. Input Material Quality Assessment: Verify the quality of input materials to ensure they meet the required standards for producing TMT bars of desired grades.
3. Parameter Verification: Check critical parameters such as water flow, pressure, water temperature, finishing bar temperature, and equalizing temperatures.
4. Bar Testing: Test the TMT bars for chemical, physical, and metallurgical properties to ensure they meet the specified standards.
5. Staff Training: Provide training to staff if necessary to enhance their skills and knowledge related to the process and equipment.
6. Final Report and Recommendations: Submit a comprehensive final report with recommendations for maintaining product quality.

It is strongly recommended to procure TMT bars exclusively from certified producers. This approach streamlines the purchasing process for buyers, guarantees the durability and strength required for construction projects, and encourages substandard producers to adhere to the necessary norms for producing high-quality TMT bars.