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Industrial-Grade U-Tube Heat Exchanger Tubes: Our U-tube heat exchanger tubes are specifically designed to meet the complex heat exchange requirements of industries such as petrochemicals, power generation, and food processing. The products strictly adhere to ASTM, ASME, and DIN international standards and support precise bending with various R radii. The bent sections undergo precise wall thickness reduction control and roundness correction to minimize fluid pressure loss. Most importantly, we offer post-bending heat treatment (annealing) to effectively eliminate processing stresses generated during bending, significantly enhancing their resistance to stress corrosion cracking. With a smooth inner wall and excellent pressure resistance, this product is an ideal choice for improving the stability of heat exchanger systems.
1. Oil, Natural Gas, and Petrochemical Industry
This is the primary application scenario for U-tube heat exchangers. In refineries and chemical plants, the media often involve high pressure, high temperature, and strong corrosiveness.
Application Equipment: Condensers, Reboilers, Feedstock Preheaters.
Function: Using U-tube bundles in shell-and-tube heat exchangers allows the tubes to expand and contract freely within the shell, solving the thermal stress problems caused by large temperature differences between the tube side and shell side.
2. Power and Energy Industry
In nuclear and thermal power plants, U-tubes are core components of energy conversion systems.
Application Equipment: High-pressure/low-pressure heaters, Steam Generators, Turbine Condensers.
Function: Used for preheating boiler feedwater, utilizing the heat from flue gas or extracted steam to raise the water temperature, significantly improving the thermal efficiency of the power plant.
3. Chemical Processing Industry
Chemical reactions are often accompanied by intense exothermic or endothermic processes.
Application Equipment: Reactor cooling coils, Acid/Alkali coolers.
Function: Because U-tubes have only one tube sheet, and the inside of the tubes is easy to clean mechanically or chemically (especially the tube side), they are ideal for handling fluids that are prone to fouling or are chemically reactive.
4. Food, Beverage, and Pharmaceutical Industry
These industries have extremely high requirements for hygiene standards and temperature control accuracy.
Application Equipment: Pasteurizers, Material heaters/coolers.
Function: Using stainless steel U-tubes ensures that the fluid undergoes heat exchange in a completely sealed, contamination-free environment, and the smooth curved tube design reduces fluid dead zones, complying with hygiene regulations.
5. Refrigeration and HVAC
In large commercial air conditioning or industrial refrigeration systems.
Application Equipment: Evaporators, Chiller heat exchangers.
Function: The compact structure of U-tube bends allows for smaller heat exchanger designs, suitable for installation in confined spaces. 6. Marine and Shipbuilding
Applications: Marine engine coolers, seawater desalination systems.
Function: U-shaped tubes made of copper-nickel alloy (Cu-Ni) or titanium materials can withstand long-term corrosion from seawater and are used to cool the lubricating oil and freshwater of marine engines.
Q: What materials are available for your U-Bending Tubes?
A: We provide a wide range of materials to suit different corrosive environments, including Stainless Steel (304/304L, 316/316L), Carbon Steel, Duplex Steel, and Copper-Nickel alloys.
Q: Do you offer stress relief heat treatment for the bend area?
A: Yes. We offer Electric Resistance Heating (ERH) or furnace annealing for the U-bend portion to eliminate residual stresses. This process is crucial for preventing stress corrosion cracking (SCC) during long-term operation.
Q: How do you control the wall thickness thinning at the bend?
A: Our precision bending machines and specialized mandrels ensure that the wall thinning is kept within strict engineering tolerances (typically less than 10-15%), maintaining the structural integrity of the tube at the most critical points.
Q: What testing standards do your U-tubes comply with?
A: Each tube undergoes comprehensive testing, including Hydrostatic Testing, Eddy Current Testing, and Ultrasonic Testing. We strictly follow global standards such as ASTM A213, A249, or A556 to guarantee industrial safety.
Q: Can you customize the bending radius (R) for specific heat exchanger designs?
A: Absolutely. We can bend tubes to a wide range of R-radii, from small diameters to large custom specifications, according to your technical drawings. We also ensure that the straight leg lengths are cut precisely to your requirements.
Industrial-Grade U-Tube Heat Exchanger Tubes: Our U-tube heat exchanger tubes are specifically designed to meet the complex heat exchange requirements of industries such as petrochemicals, power generation, and food processing. The products strictly adhere to ASTM, ASME, and DIN international standards and support precise bending with various R radii. The bent sections undergo precise wall thickness reduction control and roundness correction to minimize fluid pressure loss. Most importantly, we offer post-bending heat treatment (annealing) to effectively eliminate processing stresses generated during bending, significantly enhancing their resistance to stress corrosion cracking. With a smooth inner wall and excellent pressure resistance, this product is an ideal choice for improving the stability of heat exchanger systems.
1. Oil, Natural Gas, and Petrochemical Industry
This is the primary application scenario for U-tube heat exchangers. In refineries and chemical plants, the media often involve high pressure, high temperature, and strong corrosiveness.
Application Equipment: Condensers, Reboilers, Feedstock Preheaters.
Function: Using U-tube bundles in shell-and-tube heat exchangers allows the tubes to expand and contract freely within the shell, solving the thermal stress problems caused by large temperature differences between the tube side and shell side.
2. Power and Energy Industry
In nuclear and thermal power plants, U-tubes are core components of energy conversion systems.
Application Equipment: High-pressure/low-pressure heaters, Steam Generators, Turbine Condensers.
Function: Used for preheating boiler feedwater, utilizing the heat from flue gas or extracted steam to raise the water temperature, significantly improving the thermal efficiency of the power plant.
3. Chemical Processing Industry
Chemical reactions are often accompanied by intense exothermic or endothermic processes.
Application Equipment: Reactor cooling coils, Acid/Alkali coolers.
Function: Because U-tubes have only one tube sheet, and the inside of the tubes is easy to clean mechanically or chemically (especially the tube side), they are ideal for handling fluids that are prone to fouling or are chemically reactive.
4. Food, Beverage, and Pharmaceutical Industry
These industries have extremely high requirements for hygiene standards and temperature control accuracy.
Application Equipment: Pasteurizers, Material heaters/coolers.
Function: Using stainless steel U-tubes ensures that the fluid undergoes heat exchange in a completely sealed, contamination-free environment, and the smooth curved tube design reduces fluid dead zones, complying with hygiene regulations.
5. Refrigeration and HVAC
In large commercial air conditioning or industrial refrigeration systems.
Application Equipment: Evaporators, Chiller heat exchangers.
Function: The compact structure of U-tube bends allows for smaller heat exchanger designs, suitable for installation in confined spaces. 6. Marine and Shipbuilding
Applications: Marine engine coolers, seawater desalination systems.
Function: U-shaped tubes made of copper-nickel alloy (Cu-Ni) or titanium materials can withstand long-term corrosion from seawater and are used to cool the lubricating oil and freshwater of marine engines.
Q: What materials are available for your U-Bending Tubes?
A: We provide a wide range of materials to suit different corrosive environments, including Stainless Steel (304/304L, 316/316L), Carbon Steel, Duplex Steel, and Copper-Nickel alloys.
Q: Do you offer stress relief heat treatment for the bend area?
A: Yes. We offer Electric Resistance Heating (ERH) or furnace annealing for the U-bend portion to eliminate residual stresses. This process is crucial for preventing stress corrosion cracking (SCC) during long-term operation.
Q: How do you control the wall thickness thinning at the bend?
A: Our precision bending machines and specialized mandrels ensure that the wall thinning is kept within strict engineering tolerances (typically less than 10-15%), maintaining the structural integrity of the tube at the most critical points.
Q: What testing standards do your U-tubes comply with?
A: Each tube undergoes comprehensive testing, including Hydrostatic Testing, Eddy Current Testing, and Ultrasonic Testing. We strictly follow global standards such as ASTM A213, A249, or A556 to guarantee industrial safety.
Q: Can you customize the bending radius (R) for specific heat exchanger designs?
A: Absolutely. We can bend tubes to a wide range of R-radii, from small diameters to large custom specifications, according to your technical drawings. We also ensure that the straight leg lengths are cut precisely to your requirements.