Continuous Annealing Line (CAL)

About Continuous Annealing Line (CAL)

Continuous Annealing Line (CAL) manufactured by United Enterprises is a fully integrated annealing process which combines seven sequential operations of un-coiling, welding, accumulation, annealing, cooling, shearing, and coiling in a single line.

Brief Description:

After cold rolling, Continuous Annealing Lines (CAL) are used to soften the material and restore its workability. Compared to the conventional batch process, continuous annealing of steel strip offers undeniable quality advantages, particularly in terms of heating and cooling homogeneity.

We manufacture and export complete SS sheet annealing lines that deliver continuous and reliable operation for high yield, with annealing process speeds up to 800 m/min and entry/exit speeds up to 1,000 m/min. Our extensive in-house facility allows us to fabricate and assemble the complete line under one roof including the Un-coiler, Briddle Roller, Shearing machine, Pinch Rollers, Horizontal / Vertical Accumulator, Re-coiler, Annealing Furnace and Ammonia Cracker.

Indias first indigenously developed Continuous Annealing Line was built by us, and we continue to support clients across stainless steel and cold-rolled sheet industries with customized turnkey CAL projects.

Characteristics:

• Indias 1st indigenously developed Continuous Annealing Line
• Heating muffle made of special stainless-steel alloy
• Stainless steel and refractory steel cooling chamber
• 1560 Nm/hr Ammonia Cracker (also manufactured in-house by United Enterprises)
• Automatic temperature regulation within tight tolerance
• Automatic speed and tension control with pre-fed recipe
• Fully automated SCADA system with improved data collection and reporting
• Annealing speeds up to 800 m/min for higher productivity

About United Enterprises:

United Enterprises is a leading furnace manufacturer in India with over 25 years of experience in designing, manufacturing, supplying, exporting and commissioning Continuous Annealing Lines across Asia and Europe. Since 1998 we have built a strong reputation as a turnkey furnace solution provider, offering in-house design, fabrication and commissioning for clients in stainless steel, automotive, defence, aerospace and engineering sectors. All our products comply with CE and ISO standards.

FAQs:

Q: How do I select the right CAL configuration for my plant?

A: The right line is selected based on strip width, thickness range, coil weight, target throughput and the grade of steel being annealed. Our engineering team studies your production data and proposes a customized CAL configuration including the required ammonia cracker capacity, accumulator type and exit speed.

Q: What industries typically use a Continuous Annealing Line?

A: CAL systems are widely used in stainless steel sheet manufacturing, blade industries, electrical steel processing and cold-rolled strip production for automotive and appliance sectors.

Q: Do you provide installation and after-sales support?

A: Yes. United Enterprises offers full turnkey delivery including erection, commissioning, operator training, AMC and spare parts support. Standard warranty covers manufacturing defects and major mechanical components.

Highly Automated Annealing Process

Featuring advanced PLC and HMI control systems from Siemens or ABB, this CAL offers superior automation and operational precision. Automated process control ensures stable production, uniform heating, and efficient energy consumption, resulting in optimal metallurgical outcomes and reduced operational intervention.


Comprehensive Surface Treatment Capabilities

The CAL is equipped with integrated solutions for oxide scale removal, pickling, and cleaning, enhancing strip quality and surface finish. These pre-treatment options enable superior downstream performance and overall product durability, meeting strict industry standards and customer requirements.


Flexible Design and Customization Options

With a modular and tailored layout, the CAL can be designed to accommodate various strip thicknesses and widths according to client needs. Multiple furnace and energy source options (natural gas, electric, or alternative fuels) provide adaptability for diverse industrial applications and production scales.