Heat Exchanger Steel Tube (U-Bend / Straight, ASTM A213 304 / 316L / 321 / 310S)
- Model
- MESCO-HX-TUBE
Item specifics
- Material
- Stainless Steel (Austenitic)
- Grade
- ASTM A213 / A249 / A269 — 304, 304L, 316, 316L, 321, 310S
- Form
- Round Tube (Straight / U-Bend)
- OD
- 6 – 50 mm
- Wall
- 0.5 – 5.0 mm
- U-Bend Radius
- 1.5 × OD (typical)
- Finish
- Bright Annealed / Pickled
- Test
- Eddy-Current + Hydrostatic per ASTM A213
Review
Description
High-performance stainless heat exchanger tubes — U-bend and straight, ASTM A213 / A249 / A269 compliant, with bright annealed finish and 100% eddy-current testing. MESCO supplies stainless steel heat exchanger tubes in 304, 304L, 316, 316L, 321 and 310S grades under ASTM A213 / A249 / A269 standards. Outside diameter ranges from 6 to 50 mm with wall 0.5 to 5.0 mm, available in straight lengths or precision U-bends with bend radius typically 1.5 × OD. Each tube is bright annealed, pickled and eddy-current tested to ensure leak-tight performance in shell-and-tube heat exchangers, condensers, boilers and chemical reactors. Choose 321 for elevated temperature service (500-870 °C) where intergranular corrosion is a risk during thermal cycling, as Ti stabilization prevents chromium carbide precipitation. Choose 316L for chloride-rich wet service where pitting resistance matters more than high-temperature strength. Standard U-bend radius is 1.5 × OD for most heat exchanger designs. For thinner walls (less than 1.5 mm) the minimum is 2 × OD. We also offer 2.5 × and 3 × OD on request. Each bend is hydroformed and stress-relieved. Yes. 100% eddy-current testing per ASTM E213 is included as standard. Hydrostatic testing per ASTM A213 is also available on request. Both straight tubes and U-bends are individually tested and marked before packing. 310S (25Cr-20Ni) is designed for very high temperature service up to approximately 1100 °C in intermittent use and 1050 °C in continuous service. Above 600 °C it provides excellent oxidation resistance but lower strength compared to Inconel alloys.
Heat Exchanger Steel Tube (U-Bend / Straight, ASTM A213 304 / 316L / 321 / 310S)
Specifications & Capabilities
ASTM A213 Grades & Differences
U-Bend vs Straight Tube
Size, Wall & Pressure Rating
Cleaning, Pickling & Bright Annealing
Typical Grade & Size Range
Parameter Value Material Stainless Steel (304 / 304L / 316 / 316L / 430) Standard ASTM A240 / A480 / A312 / A213 (per product family) Finish 2B / BA / No.4 / HL / 8K / Mill / Polished Thickness / OD Custom range per family (see attributes table) MOQ 1 ton (or as agreed) Frequently Asked Questions
When should I choose 321 vs 316L for heat exchangers?
What is the typical U-bend radius?
Are the tubes eddy-current tested?
What is the maximum service temperature for 310S?
Why Choose MESCO
Factory DirectIntegrated steel mill with 18+ years export experience
Certified QualityISO 9001, ASTM / EN / JIS compliant, full MTC provided
Global LogisticsContainer, break-bulk and LCL options with CIF / FOB terms
Custom ServiceSlitting, cutting, polishing, end forming & OEM packaging
