Products Description
our Advantages
1. Strong Corrosion Resistance
Our Sa 213 Tp321 316L Stainless Steel U-Tube has passed intergranular corrosion and salt spray tests, demonstrating excellent resistance to chloride, acid, and seawater environments. It is ideal for condensers and marine heat exchangers.
2. Surface Treatment
Our tubes undergo an acid-washing treatment, resulting in a highly smooth internal surface. This not only enhances corrosion resistance but also improves heat transfer efficiency and prevents scaling.
3. Excellent Weldability
Our Sa 213 Tp321 316L Stainless Steel U-Tubes are solution-annealed and then stress-relieved, preventing cracking or deformation.
4. Easy Installation
Our U-Tubes are seamlessly bent as a single piece, requiring only welding of the two straight ends. This significantly reduces on-site welding workload and the need for welder skills, while also improving the safety and sealing reliability of the entire heat exchanger or pressure equipment.
applications areas
- Heat Exchangers: Used in shell-and-tube heat exchangers in the oil, gas, and chemical industries.
- Chemical and Petrochemical Processing: Used in condensers, evaporators, and chemical process piping.
- Boilers and Superheaters: TP321's high-temperature performance makes it an ideal choice for boiler piping and superheaters.
- Marine and Offshore Applications: Used in cooling systems and heat exchangers in marine environments.
- Power Plants: Used in high-pressure, high-temperature applications such as feedwater heaters and condensers.
Chemical Composition
| Element | Carbon | Manganese | Silicon | Phosphorus | Sulfur | Chromium | Nickel | Molybdenum | Titanium | Ferrum |
| TP321 | ≤0.08 | ≤2.0 | ≤0.75 | ≤0.045 | ≤0.030 | 17.0–19.0 | 9.0–12.0 | – | 5×C – 0.70 | Balance |
| TP316L | ≤0.035 | ≤2.0 | ≤0.75 | ≤0.045 | ≤0.030 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | – | Balance |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength 0.2% (MPa) | Elongation (%) | Hardness (HB) |
| TP321 | ≥ 515 | ≥ 205 | ≥ 40 | ≤ 217 |
| TP316L | ≥ 485 | ≥ 170 | ≥ 40 | ≤ 217 |
Possible Alternative Grades
| Alternative Grades | Reasons |
| TP317L | Offers higher molybdenum content than TP316L, providing enhanced resistance to pitting and crevice corrosion in aggressive chloride or acidic environments. |
| TP321H | High-carbon, titanium-stabilized stainless steel for high-temperature service, providing better creep resistance than standard TP321. |
| Duplex Stainless Steels (2205 / 2507) | Provide higher strength and improved resistance to stress corrosion cracking in chloride-rich or marine environments. |
| Nickel Alloys(Alloy 625, Alloy 825) | For extremely aggressive chemical or high-temperature environments where standard stainless steels may not be sufficient. |
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