U Bend Tube：
We are a specialized manufacturer of stainless steel U Bend Tubes for U Tube Heat Exchangers. Post-bending, a solution annealing process is applied to reduce residual stress, followed by hydrostatic or pneumatic testing and dye penetrant testing if necessary.
Our U Bend Tubes undergo rigorous quality checks at each stage of production, ensuring that our clients receive defect-free and top-quality products. We offer an exclusive range of U-bend tubes and, if needed, heat treat the bending portion after cold forming.
We provide bending services for a variety of tubes, including HRSG tubes, boiler tubes, economizer tubes, super-heater tubes, 180-degree return bends, 90-degree elbows, pigtail bending, architectural and ornamental bending, and replacement tubes—both bare and finned—for boiler repair. Our capabilities cover a wide range of materials including carbon steel, various grades of stainless steel, aluminum, chrome, and nickel alloys. We verify wall thickness using both destructive and ultrasonic testing to ensure you receive the expected product quality.
Product Advantages:
- Straight pipe bending undergoes 100% flaw detection before bending.
- Reliable bending machine and precise bending mold.
- Electric heating stress relief annealing applied to the U-shaped portion after bending.
- 100% hydrostatic testing after bending.
Our tubes are characterized by their roundness, straightness, wall thickness uniformity, and smooth inner and outer surfaces, making them suitable for diverse applications.
Our U Bend Tubes for heat exchangers can be supplied as 'U' bends or serpentines, manufactured in accordance with various heat exchanger standards or customized to client specifications. Materials include carbon steel, stainless steel, copper alloys, duplex alloys, titanium, Monel alloys, and nickel alloys.
Standards for Establishing U Bend Tube Tolerances:
- ASTM A556/A556M
- ASTM B395/B395M
- ASTM A688/A688M
- ASTM A803/A803M
- TEMA Section 5 § RCB 2.31
- DIN 28179
U Bend Tube Specifications:
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Product Specification:
- Tube OD: 16-38 mm
- Tube Wall Thickness: 1.5-10 mm
- Tube Length: ≤18,500 mm (≤60.7 ft)
- Bend Radius: Min: 1.5 x OD, Max: 1700 mm
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Material:
- Tube Material: Carbon Steel (C.S.), Stainless Steel (S.S.), Alloy Steel (A.S.), Copper, Titanium
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