ASME SA213 TP316L / UNS S31603 / 1.4404 Stainless Steel Seamless Heat Exchanger Tube
This product is a seamless tube manufactured to the stringent requirements of the ASME SA213 specification, which is the ASME adoption of the ASTM A213 standard. Specifically, it conforms to Grade TP316L. This standard covers seamless ferritic and austenitic alloy-steel boiler, superheater, and heat-exchanger tubes, ensuring they are suitable for high-temperature and high-pressure service. The "TP" denotes it as a tubular product, and the "L" suffix indicates a low carbon content, which is crucial for its enhanced corrosion resistance.
The primary material is TP316L austenitic stainless steel. The designation 03Х17Н14М3 is a GOST (Russian/Eastern European) standard equivalent, representing the same alloy. Its universal identifiers include:
- UNS Number: S31603
- European (EN) Number: 1.4404
- Common Name: AISI 316L
The alloy's exceptional corrosion resistance derives from its balanced chemical composition, which aligns with the specifications for 316L/1.4404.
| Cr | Ni | Mo | C | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|
| 16.00 - 18.00% | 10.00 - 14.00% | 2.00 - 3.00% | 0.030% max. | 2.00% max. | 0.75% max. | 0.045% | 0.030% |
ASME SA213 TP316L tubes offer a robust combination of strength and ductility, suitable for pressurized equipment. Representative mechanical properties include:
| Ultimate Tensile Strength (UTS) | Yield Strength (Rp 0.2%) | Elongation at Break |
|---|---|---|
| Min. 485 MPa | Min. 170 MPa | Min. 35% |
As per the ASTM A213/ASME SA213 scope, these seamless tubes are engineered for critical thermal and pressure applications. They are ideally suited for:
- Heat Exchangers & Condensers: For chemical processing, oil and gas refineries, and power generation, where resistance to cooling water chlorides and process fluids is vital.
- Boiler and Superheater Tubes: In fossil fuel and biomass power plants, especially in sections exposed to lower temperatures where corrosive condensates may form.
- Chemical & Petrochemical Processing Equipment: In reactors, pressure vessels, and piping systems handling corrosive acids, solvents, and alkaline solutions.
- Pharmaceutical & Food Processing Equipment: Where hygiene, cleanability, and resistance to cleaning agents are paramount.
- Marine and Coastal Applications: Due to their superior resistance to saltwater-induced pitting and corrosion compared to standard 304/304L grades.
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