Serrated Finned Tube: A Comprehensive Solution for Efficient Heat Transfer and Energy Saving

In the industrial heat transfer field, serrated finned tubes have emerged as a key component for enhancing efficiency with their exceptional performance. This article provides an in-depth analysis of the core characteristics of serrated finned tubes, helping you fully understand this innovative technology.

Definition and Core Value of Serrated Finned Tubes

Serrated finned tubes are heat transfer elements with serrated fins machined on the surface of the base tube through special processes. The serrated structure significantly improves heat transfer efficiency by increasing the heat transfer area and intensifying fluid disturbance. Compared to ordinary smooth tubes, the heat transfer coefficient of serrated finned tubes can be improved by 2-3 times, making them ideal for high-temperature, high-pressure, and highly corrosive environments.

Diverse Material and

The base tube material of serrated finned tubes must be customized based on operational requirements, with common options including:

• Kohlenstoffstahl: Cost-effective, suitable for high-temperature environments in power plants
• Edelstahl: Highly corrosion-resistant, ideal for strong acid environments in the chemical industry
• Copper Alloy: Suitable for special heat transfer requirements

Specification parameters are designed based on heat transfer area, fluid properties, and pressure requirements. Zum Beispiel, in a chemical project, a stainless steel base tube with an outer diameter of 25mm and a wall thickness of 2.5mm, with serrated fins 3mm high and spaced 10mm apart, achieved a total heat transfer area of 120m², successfully improving heat transfer efficiency by 40%.

Advanced Manufacturing Processes Ensure Quality

The manufacturing process of serrated finned tubes directly affects their performance and lifespan. Mainstream processes include:

1. High-Frequency Welding: Uses high-frequency current to achieve metallurgical bonding, with high weld strength suitable for high-temperature and high-pressure environments
2. Mechanical Expansion: Uses an expander to tightly fit fins onto the base tube surface, suitable for scenarios with less stringent weld requirements
3. Composite Process: Combines the advantages of welding and expansion, first welding fins in place and then expanding to enhance contact tightness and improve heat transfer efficiency

In a steel plant’s blast furnace gas waste heat recovery project, serrated finned tubes manufactured using the composite process operated continuously for three years at 800℃ without cracking or weld failure, demonstrating the reliability of the process.

Outstanding Characteristics and Significant Advantages

Characteristics:

• High heat transfer efficiency: The serrated structure increases the heat transfer area and enhances convective heat transfer
• Strong corrosion resistance: Stainless steel material resists erosion from acidic and alkaline media
• Compact structure: Large heat transfer area per unit volume, suitable for space-constrained environments
• Energy-saving and eco-friendly: Improved heat transfer efficiency directly reduces energy consumption

Advantages:

• Cost-effectiveness: Long-term operational costs are significantly lower than those of ordinary smooth tubes
• Wide adaptability: Customizable materials and specifications cater to diverse industry needs
• Easy maintenance: The design facilitates cleaning and maintenance

Best Practices for Installation and Maintenance

Installation Guidelines:

1. Ensure the installation environment is dry and ventilated, avoiding contact with corrosive substances
2. Use professional tools for fixing to prevent fin deformation
3. Use sealing materials at connections to prevent leakage

Maintenance Guide:

• Regularly inspect fin integrity and clean accumulated dust
• Conduct quarterly sealing tests
• Maintain records of operational data

Practical Application Case Studies

Case 1: Chemical Industry Sulfuric Acid Condenser UpgradeA chemical plant’s sulfuric acid condenser originally used ordinary smooth tubes, suffering from low heat transfer efficiency and severe corrosion. After upgrading to stainless steel serrated finned tubes, the heat transfer coefficient increased from 800W/(m²·K) to 2200W/(m²·K), saving annual steam costs by 1.2 million yuan and extending equipment lifespan to over ten years.

Case 2: Power Industry Boiler Air Preheater EnhancementA thermal power plant’s boiler air preheater experienced reduced heat transfer efficiency due to severe fouling. After installing carbon steel serrated finned tubes, the self-cleaning function of the serrated structure reduced fouling by 60%, improving heat transfer efficiency by 25% and saving annual coal costs by approximately 800,000 yuan.

Introduction to Cangzhou Datang

As an industrial heat transfer solution provider, Cangzhou Datang specializes in the research and production of efficient heat transfer elements such as serrated finned tubes. The company is equipped with advanced production facilities and a professional technical team, committed to providing customized heat transfer solutions. Cangzhou Datang’s products are widely used in industries such as chemical, power, and metallurgy, earning customer trust with high-quality products and services.