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Introduction to U-Bend Stainless Steel Tubes for Heat Exchangers

U-bend stainless steel tubes represent a critical component in heat exchanger systems, best suited for applications in strategic sectors such as nuclear and petrochemical machine building. Our U-bend stainless steel tubes are manufactured to meet specific client requirements, ensuring high-quality and reliable performance in demanding environments.

Custom Manufacturing Process

Our U-bend tubes are fabricated in our state-of-the-art facility, allowing for customization based on individual client needs. Each tube is designed with precision, and post-manufacturing processes include heat treatment of bends as per client specifications. We prioritize quality through rigorous testing protocols, which include hydrostatic testing and dye penetrant testing when required.

Applications in Heat Exchanger Systems

U-bend stainless steel tubes are extensively utilized in heat exchanger systems, which are vital for efficient thermal energy transfer in industrial operations. These tubes facilitate optimal heat exchange and enhance the reliability of heat transfer equipment, making them indispensable in industries such as nuclear energy and petrochemicals.

Production Standards and Specifications

Our tube-bending line is equipped to produce U-tubes adhering to stringent industry standards, including:

• ASTM A688/A688M-08
• ASTM A803/A803M
• ASTM A556/A556M (ASME SA-556)
• ASME SA-688

These standards ensure that our products meet the requirements for quality, safety, and performance in critical applications.

Key Specifications

• Initial Length: We can provide maximum lengths of up to 27,000 mm upon request, accommodating various project specifications.
• Bending Radius: Our manufacturing process allows for a maximum bending radius of 1,000 mm, providing flexibility in design.
• Heat Treatment: U-bends with a bending radius of up to 1,000 mm can be heat treated upon request to enhance performance and durability.

Rigorous Testing Protocols

Before and after manufacturing, our U-bend tubes undergo a series of detailed testing processes to ensure their reliability and structural integrity. Our basic testing and processing include:

1. High Pressure Hydrostatic Test: Conducted at minimum pressures of 10 MPa to 25 MPa.
2. Air Under Water Test: Performed to detect any potential leaks after bending.
3. U Tubes Wall Thickness Test: Ensuring compliance with dimensional specifications.
4. Eddy Current Test: Conducted before the U-bend is formed to check for material integrity.
5. Ultrasonic Test: Performed on raw materials before bending to identify any internal flaws.
6. Heat Treatment: Stress relieving treatments applied as necessary.
7. Ball Passing Test: To confirm the flow capacity of the tubes.

Available Materials and Grades

We offer U-bend stainless steel tubes in various grades to meet diverse application needs, including:

• 304/304L/304H (1.4301/1.4306/1.4948)
• 316/316L (1.4401/1.4404)
• 316Ti (1.4571)
• 321 (1.4541)
• 309S (1.4833)
• 310S (1.4845)
• 317L (1.4438)
• 321H (1.4878)
• 347H (1.4550)
• 2205 (1.4462)
• S31803 and 2507

Compliance with International Standards

Our U-bend stainless steel tubes are produced in compliance with various international standards including:

• EN 10216-5
• DIN 17456, DIN 17458
• GB/T14975, T14976, T13296, GB5310
• ASTM A213, A269, A312, A511, A789, A790
• JIS G3459, G3463
• GOST 9940, GOST 9941

Conclusion

At our company, we are committed to delivering high-quality U-bend stainless steel tubes that meet the rigorous demands of heat exchanger applications. With customization options, rigorous testing, and adherence to international standards, our products are designed to provide excellence in performance and reliability.

For inquiries or to discuss your specific requirements for U-bend stainless steel tubes, please contact us today. We look forward to being your trusted partner in meeting your heat exchanger needs!