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Quality ASTM A213 Stainless Steel Heat Exchanger Tube Corrosion Resistant U Bend Pipe factory
Quality ASTM A213 Stainless Steel Heat Exchanger Tube Corrosion Resistant U Bend Pipe factory

ASTM A213 Stainless Steel Heat Exchanger Tube Corrosion Resistant U Bend Pipe

Basic Properties
Place of Origin: MADE IN CHAINA
Brand Name: Baosteel，TISCO
Certification: EN 10204 Type 3.1 / 3.2 available
Model Number: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507
Trading Properties
Minimum Order Quantity: 100kg
Price: Negotiable (Request a Quote)
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Ability: 10000tons
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Molybdenum Alloy Stainless Steel Pipe

Stainless Steel Pipe Chloride Resistance

ASTM A213 Stainless Steel Heat Exchanger Tube
Product Summary
U-bend stainless steel heat exchanger tubes are seamless or welded tubes precision-formed into a U-shape, designed specifically for shell and tube heat exchangers. This U-configuration allows the tube bundle to expand and contract freely under thermal stress while eliminating the need for a second ...

Product Details

Highlight:

ASTM A213 Stainless Steel Heat Exchanger Tube

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U Bend Stainless Steel Heat Exchanger Tube

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Corrosion Resistant Stainless Steel U Bend Pipe
Country Of Origin: MADE IN CHAINA
Brand: Baosteel，TISCO
Certifications: ISO/EN 10204 Type 3.1 / 3.2 Available
Grade: 201 / 202 / 301 / 302 / 303 / 304 / 304L / 305 / 309S / 310S / 316 / 316L / 317 / 317L / 321 / 347 / 409L / 410 / 420 / 430 / 440C / 2205 / 2507 / 630 (17-4PH)
MOQ: 100kg
Price: Negotiable (Request A Quote)
Packaging: Wooden Case / Wooden Pallet / Steel Frame / Carton / Woven Bag
Delivery Time: 15-25days
Payment Terms: T/T，D/P，D/A，Western Union，PayPal
Supply Capacity: 10000tons
Product Description

U-bend stainless steel heat exchanger tubes are seamless or welded tubes precision-formed into a U-shape, designed specifically for shell and tube heat exchangers. This U-configuration allows the tube bundle to expand and contract freely under thermal stress while eliminating the need for a second tube sheet, making the entire heat exchanger more compact, cost-effective, and easier to maintain.

Manufactured from high-quality austenitic stainless steel grades such as 304, 304L, 316, and 316L, U-bend tubes offer exceptional resistance to corrosion, high temperatures, and pressure. They are widely used in petrochemical plants, power generation facilities, HVAC systems, food processing, and pharmaceutical industries, where efficient heat transfer and equipment reliability are critical.

The cold-bending process is carefully controlled to ensure uniform wall thickness, no visible flattening or wrinkling, and complete stress relief annealing to restore mechanical properties. Each tube undergoes rigorous non-destructive testing to guarantee long-term performance in demanding service conditions.

Why Choose U-bend stainless steel heat exchanger tubes?

  • Eliminates one tube sheet, reducing heat exchanger weight and cost
  • Allows unrestricted thermal expansion of individual tubes
  • Simplifies cleaning and maintenance – the tube bundle can be easily removed
  • Compact design saves valuable floor space
  • Ideal for high-temperature differential applications

Specifications

Parameter Details
Product Name U-Bend Stainless Steel Heat Exchanger Tube
Tube Type Seamless / Welded and drawn
Grades 304, 304L, 316, 316L, 321, 347, Duplex 2205, 904L
Outer Diameter (OD) 6.35 mm – 50.8 mm (1/4″ – 2″)
Wall Thickness 0.5 mm – 3.0 mm (0.020″ – 0.120″)
Straight Leg Length 500 mm – 12,000 mm (custom available)
Bend Radius (R) 1.5 * OD – 5 * OD (custom radii available)
Bend Angle 180° (U-shape) standard; other angles on request
Tolerance – OD ±0.1 mm (for OD < 25.4 mm); ±0.15 mm (for OD ≥ 25.4 mm)
Tolerance – Wall Thickness ±10%
Surface Finish Annealed and pickled / Bright annealed / Polished
Standard ASTM A213, ASTM A249, ASTM A269, ASTM A789, ASME SA213, EN 10216-5, EN 10217-7

Chemical Composition (Typical Values, % by weight)

Grade C max Mn max P max S max Si max Cr Ni Mo Others
304 0.08 2.00 0.045 0.030 0.75 18.0–20.0 8.0–10.5 — —
304L 0.03 2.00 0.045 0.030 0.75 18.0–20.0 8.0–12.0 — —
316 0.08 2.00 0.045 0.030 0.75 16.0–18.0 10.0–14.0 2.0–3.0 —
316L 0.03 2.00 0.045 0.030 0.75 16.0–18.0 10.0–14.0 2.0–3.0 —
321 0.08 2.00 0.045 0.030 0.75 17.0–19.0 9.0–12.0 — Ti ≥5*C
347 0.08 2.00 0.045 0.030 0.75 17.0–19.0 9.0–13.0 — Nb ≥10*C
Duplex 2205 0.03 2.00 0.030 0.020 1.00 22.0–23.0 4.5–6.5 3.0–3.5 N 0.14–0.20
904L 0.02 2.00 0.045 0.035 1.00 19.0–23.0 23.0–28.0 4.0–5.0 Cu 1.0–2.0

Mechanical Properties

Grade Tensile Strength min (MPa) Yield Strength min (MPa) Elongation min (%) Hardness max (HRB)
304 515 205 35 90
304L 485 170 35 90
316 515 205 35 90
316L 485 170 35 90
321 515 205 35 90
347 515 205 35 90
Duplex 2205 620 450 25 —
904L 490 215 35 —

Physical Properties (Typical for 304/316):

Property Value
Density 7.9 – 8.0 g/cm³
Modulus of Elasticity 193 – 200 GPa
Thermal Conductivity (100°C) 16.2 W/(m·K)
Specific Heat (0-100°C) 500 J/(kg·K)
Electrical Resistivity 720 μΩ·m
Melting Range 1370 – 1400°C

U-bend stainless steel heat exchanger tubes Manufacturing Process

Our U-bend tubes are produced following strict quality control procedures:

Step Description
1. Tube Selection Straight seamless or welded tubes are inspected for dimensional accuracy
2. Tube Preparation Cleaned, cut to precise leg length, ends deburred
3. Cold Bending CNC mandrel bending machine with controlled radius, no wrinkling or flattening
4. Stress Relief Annealing Heat treatment at 1010°C – 1120°C to eliminate residual stress
5. Pickling & Passivation Removes heat tint and restores corrosion resistance
6. Dimensional Inspection Check bend radius, leg length, ovality, and wall thickness reduction
7. Non-Destructive Testing 100% eddy current or ultrasonic testing
8. Hydrostatic Test Pressure test per customer requirement
9. Final Cleaning & Packaging Oil-free cleaning, plastic end caps, wooden crates

Dimensional Tolerances

Parameter Tolerance
Outside Diameter (OD) ±0.1 mm (OD < 25.4 mm); ±0.15 mm (OD ≥ 25.4 mm)
Wall Thickness ±10%
Straight Leg Length ±1.5 mm/meter
Bend Radius (R) ±1.5 mm (R < 100 mm); ±2.0 mm (R ≥ 100 mm)
Center-to-Center Leg Distance ±1.5 mm
Ovality after Bending ≤ 10% of OD
Wall Thinning after Bending ≤ 15% of original wall thickness
End Squareness ≤ 1°
Burr Removal ≤ 0.2 mm

Contact Us

For inquiries, quotations, or technical support regarding U-bend stainless steel heat exchanger tubes, please contact us now

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