Heat Exchanger Tube ASME SA213 TP316L Seamless Stainless Steel U Bend Tube
ASTM A213/ASME SA213 TP316L Stainless Steel U-Bend Tube is a seamless, austenitic stainless steel heat-exchanger/boiler tube manufactured to ASTM A213/A213M (or ASME SA213), grade TP316L (UNS S31603), and bent into a U shape. The U-bend tube’s configuration has two straight legs connected by a 180° bend, so both tube ends terminate at the same tube sheet. This allows free thermal expansion and is widely used in shell-and-tube heat exchangers, feedwater heaters, condensers, and similar equipment.
TP316L is the low-carbon variant of 316 molybdenum-bearing stainless steel. The “L” denotes ultra-low carbon content (max 0.035%), which effectively eliminates intergranular carbide precipitation and delivers superior resistance to welding-induced corrosion and sensitization . Different from ordinary straight stainless steel tubes, U bend tubes are specially designed for closed-loop heat exchange systems, realizing continuous fluid circulation without extra pipe fittings, reducing system leakage points and optimizing heat transfer efficiency. All finished products undergo mandatory non-destructive testing, hydrostatic testing and dimensional inspection to meet industrial heat exchanger and boiler operating requirements.
Chemical Composition of TP316L (wt%):
| Carbon (C) |
Manganese (Mn) |
Silicon (Si) |
Phosphorus (P) |
Sulfur (S) |
Chromium (Cr) |
Nickel (Ni) |
Molybdenum (Mo) |
| ≤0.035 |
≤2.00 |
≤1.00 |
≤0.045 |
≤0.030 |
16.00–18.00 |
10.00–14.00 |
2.00–3.00 |
Mechanical Properties:
| Minimum Tensile Strength |
485 MPa |
| Minimum Yield Strength (Rp0.2) |
170 MPa |
| Minimum Elongation (A) |
35% |
| Maximum Rockwell Hardness (HRB) |
95 |
| Maximum Brinell Hardness (HB) |
217 |
Core Product Features:
Excellent Corrosion Resistance
Stable High And Low Temperature Performance
High Structural Integrity
Low Fluid Resistance & High Heat Transfer Efficiency
Excellent Processability And Durability
Good Formability And Weldability
Intergranular Corrosion Resistance
Applications of ASME SA213 TP316L Stainless Steel U-Bend Tubes:
Shell-and-tube heat exchangers
U-tube heat exchangers
Feedwater heaters
Surface condensers
Steam generators
Boilers and superheaters
Reheaters
Petrochemical and chemical process equipment
Oil and gas refining
Power generation plants
Desalination plants
Pulp and paper industry
Food, dairy, and beverage processing
Pharmaceutical and biotech equipment
Marine and offshore applications
Heat recovery systems
HVAC and refrigeration
Ordering Information:
When ordering ASME SA213 TP316L Seamless Stainless Steel U-Bend Tubes, please specify:
Quantity
Outside diameter and wall thickness
Straight leg length
U-bend radius
Total developed length
Surface finish
Delivery condition
Testing requirements
Marking and packaging
Any additional requirements from customer’s drawing
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