Overseas Project Case: Stainless Steel Annealing Line For Thailand Hardware Factory

With the rapid development of Southeast Asian metal processing industry, Thailand has become an important production base for stainless steel hardware, standard fasteners and architectural metal parts. Most local hardware factories face prominent pain points such as unstable annealing quality, high scrap rate and low production efficiency with traditional old-fashioned furnaces.

This article takes Rexin Furnace’s turnkey stainless steel continuous bright annealing line project for a large Thailand local hardware factory as an example, sorting out project background, customized solutions, equipment advantages and actual production benefits, providing reference for overseas similar hardware factory upgrading and transformation.

Project Background & Customer Pain Points

The cooperative Thailand customer is a local leading hardware manufacturing enterprise, mainly producing 304/316L stainless steel screws, nuts, stamping hardware parts and decorative metal accessories, with annual output of over 8,000 tons. Before cooperation, the customer adopted traditional batch box annealing furnaces, facing multiple production bottlenecks.

First, unstable batch quality: traditional furnaces have large temperature deviation, resulting in inconsistent surface brightness and hardness of stainless steel parts, with a long-term scrap rate of 4%-6%, seriously affecting product delivery.

Second, low production efficiency: intermittent batch production cannot meet the growing large-scale order demand, with long production cycle and frequent equipment startup and shutdown, resulting in serious energy waste.

Third, high post-processing cost: traditional annealing produces surface oxidation and color difference, requiring secondary pickling and polishing processes, increasing labor and chemical material costs, and failing to meet EU environmental protection export standards.

Fourth, insufficient automation: relying on manual loading and unloading and parameter adjustment, the production error rate is high, and the production management cost is expensive.

Customized Turnkey Furnace Solution

Combined with the customer’s product characteristics, production scale and Southeast Asian local workshop conditions, Rexin Furnace provided a customized full-automatic continuous mesh belt bright annealing line turnkey solution, covering equipment design, production, installation, commissioning and after-sales training.

1. Core Equipment Configuration

The project adopts multi-zone PID precise temperature control continuous annealing furnace, with strict ±5°C furnace temperature uniformity. Equipped with high-purity hydrogen protective atmosphere system, realizing zero-pickling bright annealing forming, completely eliminating surface oxidation and color difference defects.

The furnace body adopts optimized thermal insulation structure and heat recovery system, greatly reducing unit energy consumption. The supporting full-automatic feeding and discharging system realizes 24-hour unmanned continuous production, matching the customer’s mass production rhythm.

2. Local Adaptation Optimization

Aiming at Thailand’s high temperature and high humidity climate, the equipment is optimized with moisture-proof and anti-corrosion design for electrical and gas circuit systems to avoid dew point abnormality and equipment failure caused by humid environment.

According to the customer’s workshop space size, the production line layout is customized to save floor space and optimize production line flow, improving overall workshop operation efficiency. All equipment meets CE international certification, fully adapting to local environmental protection and production safety standards.

3. Process Parameter Customization

Aiming at the customer’s 304 and 316L stainless steel hardware products, the technical team optimized exclusive segmented heating, heat preservation and slow cooling curves, solving the problems of workpiece deformation and inconsistent hardness, and improving product batch stability.

Project Operation Effect & Actual Benefits

1. Quality Improvement: Scrap Rate Sharply Reduced

After the equipment is put into operation, the furnace temperature uniformity is stably controlled within ±5°C, the product surface reaches mirror bright effect without oxidation and color difference, and the comprehensive scrap rate drops from 5% to below 1%, greatly reducing raw material waste and rework costs.

2. Efficiency Upgrade: Production Capacity Doubled

The fully automatic continuous production mode realizes uninterrupted operation all day long, breaking the capacity bottleneck of traditional intermittent production. The customer’s daily production capacity is increased by 110%, fully meeting the growing export order demand.

3. Cost Reduction: Comprehensive Operating Cost Saved

The zero-pickling process eliminates pickling and polishing post-processing links, saving a large amount of chemical raw material and labor costs. The optimized energy-saving structure reduces unit power consumption by 28%, and the annual energy cost saving is very considerable.

4. Export Qualification Upgrade

The zero-pollution green production mode meets international environmental protection standards, helping customers smoothly pass EU environmental audits, expand high-end overseas markets, and significantly improve product profit margins and brand competitiveness.

Overseas Project Service Advantages

Rexin Furnace provides one-stop overseas turnkey project services, including pre-sales scheme customization, factory layout design, equipment production, international logistics, on-site installation and commissioning, staff technical training and long-term remote after-sales support. For Southeast Asian projects, we have localized service teams to quickly respond to customer demands and solve operation and maintenance problems.

Conclusion

The Thailand stainless steel hardware annealing line project fully verifies the advantages of Rexin continuous bright annealing furnace in mass production, energy saving and quality stabilization. Customized furnace solutions for regional production characteristics and product demands can effectively solve traditional production pain points, create substantial cost reduction and efficiency improvement benefits for overseas customers, and provide reliable equipment support for the upgrading of Southeast Asian metal processing industry.

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