Exhaust Gas Recirculation Tube

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Exhaust Gas Recirculation Tube

The EGRTube is a key channel that cools a portion of the engine's exhaust gas before redirecting it into the intake system. This significantly reduces combustion temperatures, reduces nitrogen oxide (NOx) emissions, and improves fuel economy.

Product Features:
1. Hybrid Tube/Corrugated Tube Structure: Available in either hybrid or corrugated tube configurations, the design balances rigidity and flexibility, tailored to platform requirements.
2. Efficient Heat Exchange: The tube wall incorporates a high-thermal-conductivity aluminum/copper composite material, combined with a coolant flow channel design, to achieve high heat recovery at low pressure drop, reducing exhaust temperature by 30-40%.
3. High-Temperature and Corrosion-Resistant: The main body is constructed of 304/316L stainless steel or Inconel 718, operating in temperatures from -40°C to +150°C, meeting the demands of demanding engine underhood environments.
4. Lightweight Design: The thin-wall corrugated structure reduces overall weight by approximately 15-20% compared to traditional rigid tubes.

In addition to our standard product line, we also offer customized solutions for a wide range of industries and applications, from single-piece production to mass production.

NINGBO JIATIAN AUTOMOBILE PIPE CO.,LTD.

About JIATIAN

The company is located in Wanhou, Zhanqi Town, Yinzhou District, Ningbo City. It is 25 kilometers away from Ningbo Liushi Airport and 5 kilometers away from Ningbo Coastal Industrial Zone. The surrounding area is beautiful with convenient transportation. The company was established on the basis of the development of Ningbo Xingxin Metal Products Factory (established in 1995), and is a high-tech enterprise specializing in the production of automotive pipe fittings. The company's area is 32,000 square meters; the factory area is 26,000 square meters.

The main products of the company are: manufacturing and development of automotive corrugated pipes. Currently, there are 10 CNC fully automatic pipe bending machines, 2 large-scale brazing furnaces assembly lines, 10 various specifications hydraulic internal forming machines (with the maximum processing length of 1.5 meters and diameters ranging from ￠10 to ￠80), 1 800T hydraulic water expansion machine, 4 fully automatic laser welders, 4 sets of welding robots, 8 large-scale machining centers, 6 Panasonic arc welding machines, and over 30 various supporting pipe forming machines. The company has its own R&D and processing centers. The water expansion corrugated pipe equipment and technology of the company are currently at the industry leading level. A comprehensive laboratory has been established.

The company is committed to creating the world's leading automotive bellows with outstanding quality and innovative technology, ensuring that each product can perform well in various environments and promoting the progress of the industry.

NINGBO JIATIAN AUTOMOBILE PIPE CO.,LTD.

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News and Information

Exhaust Gas Recirculation Tube Industry knowledge
As global emission regulations become increasingly stringent, automotive manufacturers face the dual challenge of reducing nitrogen oxide (NOx) emissions while maintaining engine performance and fuel economy. EGR (Exhaust Gas Recirculation) technology effectively lowers combustion chamber temperatures by cooling and recirculating a portion of exhaust gases back into the intake system, thereby inhibiting NOx formation. In this system, the?EGR cooler tube? serves as a core component, with its performance directly impacting the efficiency and reliability of the entire emission control system.?
JIATIAN, leveraging nearly 30 years of experience in automotive metal processing, has created a high-performance EGR cooler tube series. Through innovative combinations of materials science and structural engineering, we provide the industry with reliable emission reduction solutions.

Fundamental Understanding: Core Functions of EGR Systems and Cooler Tubes

The EGR system is an essential emission control technology in modern engines. Its core component, the EGR cooler tube, is responsible for efficiently cooling high-temperature exhaust gases (which can reach 600-750°C) before recirculating them into the engine intake system. This process can lower combustion temperatures by approximately 0-200°C, significantly reducing NOx formation.
The EGR cooler tube? is not merely a simple gas passage but a precision component integrating heat exchange, pressure management, and corrosion resistance. It operates reliably in harsh environments ranging from -40°C to +0°C, withstanding challenges like vibration, thermal cycling, and chemical corrosion present in the engine compartment .
Key Performance Indicators of EGR Cooler Tubes.

Performance Parameter?
Traditional Metal Tube?
JIATIAN EGR Cooler Tube?
Improvement?
Temperature Reduction Efficiency
20-25%
30-40%
>50% improvement
Corrosion Resistance Life
Medium (2-3 years)
Long (5+ years)
~100% increase
Weight
Standard Weight
-20% Reduction
Significant improvement
Pressure Loss
Relatively High
Low Pressure Drop Design
20-30% optimization

Core Technologies: Innovations in Materials and Manufacturing

Hybrid Bellows Structure: Balancing Rigidity and Flexibility

JIATIAN's EGR cooler tubes employ a hybrid bellows design? that combines the advantages of rigid sections and flexible segments. The rigid sections ensure structural stability and sealing, while the bellows segments? compensate for engine vibration and differential thermal expansion through their flexible characteristics. This design addresses stress concentration issues caused by thermal expansion and contraction, extending the component's service life.

Efficient Heat Exchange Technology

The core effectiveness of the EGR cooler tube lies in its heat exchange capability. Our products utilize?high thermal conductivity aluminum/copper composite materials? combined with optimized cooling channel designs to achieve efficient heat transfer. The unique internal structure maximizes the heat exchange area between exhaust gas and coolant while maintaining low airflow resistance, ensuring engine backpressure does not increase significantly .

Advanced Materials Science Application

For high-temperature and corrosive environments, JIATIAN's EGR cooler tubes primarily use?304/316L stainless steel? or?Inconel 718? high-performance alloys. These materials offer excellent high-temperature oxidation resistance and corrosion resistance, enabling long-term operation in harsh conditions .
EGR Cooler Tube Material Performance Comparison
Material Type?
Maximum Withstand Temperature?
Corrosion Resistance?
Cost Factor?
Application Scenario?
304 Stainless Steel
~750°C
Good
Medium
Standard Passenger Vehicles
316L Stainless Steel
~800°C
Excellent
Relatively High
Vehicles with High Emission Requirements
Inconel 718
~1000°C
Exceptional
High
High-Performance/Racing Applications

Future Development Directions of EGR Technology


Integration and Intelligence

With the widespread adoption of turbocharging technology,?integrated design of exhaust manifolds and turbine housings? has become a trend. Similarly, EGR systems are moving towards higher levels of integration. Future EGR cooler tubes will not be independent components but deeply integrated with engine management systems, utilizing sensors for real-time monitoring of gas temperature, pressure, and flow rate to achieve intelligent regulation.


Challenges and Opportunities in the Electrification Era

Hybrid and plug-in hybrid electric vehicles pose new requirements for EGR systems. These vehicles involve frequent engine start-stop cycles, requiring the EGR system to?respond quickly? and heat up the catalytic converter rapidly during cold starts to reduce emissions. JIATIAN's thin-wall bellows structure features lower heat capacity, enabling faster achievement of operating temperatures to meet the specific needs of hybrid vehicles .


Application of New Materials and Processes

Additive manufacturing (3D printing) technology allows for greater design freedom in EGR cooler tubes, optimizing internal channel shapes to improve airflow characteristics. Meanwhile, the application of new materials like?ceramic matrix composites? will further enhance heat resistance and durability to meet the demands of future high-performance engines.?

JIATIAN's Professional Advantages

Leveraging our own R&D and processing centers, JIATIAN has advanced?hydroforming bellows equipment and technology? to industry-leading levels. The company possesses 10 CNC fully automatic pipe bending machines, 2 large brazing furnace production lines, 4 fully automatic laser welders, and 8 large machining centers, enabling flexible manufacturing from single-piece production to large-scale batches.?
Our engineering technology team focuses on providing?customized solutions? for each customer, fully considering layout constraints, performance requirements, and cost targets of different engine platforms to ensure each EGR cooler tube delivers optimal performance in its specific application scenario.

Frequently Asked Questions:


What is the typical service life of an EGR cooler tube?

Under normal operating conditions, JIATIAN EGR cooler tubes are designed to last the vehicle's lifetime (typically 8-10 years or 0,000-200,000 kilometers). We conduct rigorous durability tests simulating high temperatures, vibration, and corrosive environments to ensure reliable performance throughout the product's life cycle .


How to tell if an EGR cooler tube needs replacement?

Common signs of failure include: illuminated check engine light (with EGR system related fault codes), increased NOx emissions, decreased fuel economy, and visible damage or leaks. Regular professional inspection is the best way to ensure proper system operation .


What are the advantages of bellows structure compared to traditional rigid tubes?

The main advantage of the bellows structure is its?resistance to vibration and thermal stress. Vibrations and thermal expansion generated during engine operation are absorbed by the flexible bellows section, reducing stress on connection points and lowering the risk of leaks and fractures. This design also reduces overall weight, contributing to vehicle lightweighting?


What are JIATIAN's customization capabilities?


We offer comprehensive customization services based on customer needs, including: material selection (stainless steel, nickel-based alloys, etc.), connector design (flanges, threads, etc.), shape and size adjustments, and performance optimization. Our engineering team works closely with customers, providing full technical support from concept design to mass production.


Any special considerations for EGR cooler tubes in hybrid electric vehicles?


In hybrid vehicles, frequent engine start-stop requires faster response from the EGR system. JIATIAN's EGR cooler tubes developed for hybrid platforms use a?thin-wall design? and special heat exchange structure to heat up quickly and reduce emissions faster during cold starts ..