Bright Annealing Line

About Bright Annealing Line

Bright Annealing Line manufactured by United Enterprises is a complete continuous heat treatment line for bright annealing of stainless steel, copper and other alloy strips/tubes in a reducing atmosphere.

Brief Description:

Our Bright Annealing Lines are widely used for stainless steel pipes, tubes, wires and sheets where a clean, oxide-free surface is critical. The furnace section operates under cracked ammonia (75% Hydrogen + 25% Nitrogen) or other reducing gas to prevent surface oxidation and to deliver a bright, scale-free finish.

We are among the few manufacturers in India with in-house capability to design and supply the complete line including the bright annealing furnace, ammonia cracker, dew point analyser, quench system and recoiler. The line is engineered for continuous operation with tight temperature control (1C) and uniform heating zones.

For specialised applications, we also offer batch-type bright annealing configurations. Each line is customized for the customers product range and production rate.

Characteristics:

• Continuous bright annealing in cracked ammonia / hydrogen atmosphere
• Indigenous in-house design of furnace plus gas generators
• Automatic temperature regulation with 1C precision
• Dew Point meter, gas train and analysers for atmosphere control
• Low-density high-quality insulation for heat retention
• Available in both electrical and high-efficiency gas-fired versions
• Customizable furnace length and kilowatt rating based on output
• Fully automated SCADA system with improved data collection

About United Enterprises:

United Enterprises is one of the leading bright annealing furnace manufacturers in India with over 25+ years of experience. Founded in 1998, we design, manufacture, supply, export and commission tailor-made Bright Annealing Lines across Asia and Europe. We are recognised among top furnace suppliers in India with a strong customer base in stainless steel pipe, wire, sheet and tube industries, supported by CE and ISO compliant manufacturing.

FAQs:

Q: How do I choose the right Bright Annealing Line for my product?

A: Selection is based on material grade (SS 300/400 series, Cu alloys), product form (wire, strip, tube), required throughput and surface finish. Our team helps finalize chamber size, atmosphere capacity and line speed accordingly.

Q: Why is cracked ammonia preferred over pure hydrogen?

A: Cracked ammonia (75% H + 25% N) is significantly more economical than bottled hydrogen while providing an effective reducing atmosphere for most bright annealing applications.

Q: What kind of after-sales service do you provide?

A: We offer full erection, commissioning, operator training and AMC services along with quick spare part dispatch for the furnace, cracker and instrumentation.

Advanced Annealing Technology

Our Bright Annealing Line utilizes muffle or bell furnaces to deliver uniform heating and high-quality finishes. With fully automated PLC/HMI controls, this system provides precise management of process parameters and ensures reliability across various stainless steel grades. Safety features, such as integrated gas detection and interlocks, boost operational security.


Versatile Process & Customization

Capable of handling tubes from 6 mm to 114 mm in diameter and thicknesses from 0.4 mm to 5 mm, the line is adaptable for diverse production needs. Customizable power, voltage, and dimensions ensure seamless integration in different industrial environments. Available with electric, oil, or gas heating, and suitable for both strip and coil processing.


Energy Efficient & Environmentally Friendly

Engineered for minimized energy consumption, the system leverages optimized insulation and efficient atmosphere controls. The use of protective gases prevents oxidation, delivering a premium bright finish while adhering to stringent environmental standards. Installation and aftersales support are provided by our expert team.