Products Description
Product Specifications
| Standards | JIS G3463 |
| Steel Grades | SUS304TB SUS304HTB SUS304LTB SUS309TB SUS309STB SUS310TB SUS310STB SUS312LTB SUS316TB SUS316HTB SUS316LTB SUS316TiTB SUS317TB SUS317LTB SUS321TB SUS321HTB,etc. |
| Equivalent Standards | ASTM A213 / EN 10216-5 |
| Outer Diameter (OD) | 6 mm – 219 mm |
| Wall Thickness (WT) | 0.5 mm – 20 mm |
| Length | 6/12m, or customized |
| Surface Treatment | Pickled |
| Production Process | Cold-drawn / Cold-rolled |
| Condition | Solution annealed |
The stainless boiler tube utilizes "H-grade" high-temperature stainless steel alloys. Compared to standard 304/316 grades, SUS304H/316H features a precisely controlled carbon content of 0.04–0.10% and a grain size finer than ASTM Grade 7, significantly enhancing high-temperature creep strength. They are suitable for service temperatures ranging from approximately 500°C to 800°C.
The tubing exhibits excellent cold-bending ductility and weldability. Unlike carbon steel boiler tubes, which require complex procedures such as pre-heating and post-weld heat treatment, austenitic stainless steel maintains superior overall properties in the as-welded condition, thereby shortening the equipment installation schedule.
Customized Services
- TORICH offers custom precision sizing services, in addition to standard ranges-Outer Diameter (OD) of 6.0 mm–219.0 mm and Wall Thickness (WT) of 0.5 mm–20.0 mm-we accommodate special size requirements with ODs up to 325.0 mm.
- We provide tube end and beveling services, including plain ends and internal/external chamfering, as well as machining to specifications for V-bevels (30°, 37.5°), U-bevels, and compound bevels.
- Bending and forming services are available, including U-bends, serpentine coils, and coiled tubing configurations.
- TORICH supplies products with pickled surfaces and offers various surface treatments, such as Bright Annealing (BA) (Ra ≤0.8 μm), mechanical polishing (Ra ≤0.4 μm), and electropolishing (Ra ≤0.3 μm).
Chemical Composition
| Element | C | Si | Mn | P | S | Cr | Ni | Mo | Ti | Nb |
|---|---|---|---|---|---|---|---|---|---|---|
| SUS304H | 0.04–0.10 | ≤1.0 | ≤2.0 | ≤0.045 | ≤0.03 | 18–20 | 8–11 | - | - | - |
| SUS316H | 0.04–0.10 | ≤1.0 | ≤2.0 | ≤0.045 | ≤0.03 | 16–18 | 10–14 | 2–3 | - | - |
| SUS321H | 0.04–0.10 | ≤1.0 | ≤2.0 | ≤0.045 | ≤0.03 | 17–19 | 9–12 | - | Ti ≥5×C | - |
| SUS347H | 0.04–0.10 | ≤1.0 | ≤2.0 | ≤0.045 | ≤0.03 | 17–19 | 9–13 | - | - | Nb ≥10×C |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Max Service Temp |
|---|---|---|---|---|
| SUS304H | ≥520 | ≥205 | ≥35 | ~600°C |
| SUS316H | ≥520 | ≥205 | ≥35 | ~650°C |
| SUS321H | ≥520 | ≥205 | ≥35 | ~700°C |
| SUS347H | ≥520 | ≥205 | ≥35 | ~750–800°C |
Possible Alternative Grades
- When the boiler operating temperature remains consistently below 550°C, and there is no significant flue gas sulfide corrosion, conventional TB-grade stainless steel can be used as a substitute, reducing costs by 12%–18%.
- For extreme chemical boiler operating conditions-characterized by temperatures consistently above 700°C, high-sulfur flue gas corrosion, and high-pressure cyclic loading-SUS310S can be employed, as it offers a maximum temperature resistance of up to 1000°C.
- Super 304H can be selected as a substitute for SUS347H; it is commonly used in ultra-supercritical boilers.
application areas
Stainless boiler tube specified by the JIS G3463 standard is widely used in chemical plant systems subject to high-temperature, high-pressure steam, including:
- Industrial steam boilers
- Boiler superheaters
- Boiler reheaters
- Waste heat recovery boilers (WHRB)
- Heat recovery steam generators (HRSG)
- Process heaters and fired heaters
- Steam heating coils
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: What grades of stainless steel can be used for ASTM A213 boiler tubes?
A: We offer various stainless steel materials such as TP202, TP304, TP304H, TP309H, TP310S, TP321, and TP347H, depending on customer applications. For applications in extremely high temperatures or chemically corrosive environments, we also offer nickel-based alloys such as Incoloy 800H, Incoloy 825, and Inconel 625.
Q: How is the quality and reliability of the tubes guaranteed?
A: TORICH subjects every batch of products to strict quality control, including: chemical composition verification, tensile strength and yield strength testing, hydrostatic or eddy current testing, ultrasonic testing, and dimensional inspection. The tubes are supplied with a factory test certificate (EN 10204 3.1), and third-party inspection reports (SGS, BV, TUV) are available upon request.
Q: Can these tubes withstand high-temperature and high-pressure boiler conditions?
A: Yes. ASTM A213 stainless steel seamless boiler tubes are specifically designed for high-temperature and high-pressure environments. Grades such as TP309H and TP310S offer excellent oxidation and creep resistance at temperatures up to 1100°C.
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