Products Description
Product Specifications
| Standards |
ASTM A213/A213M |
| Steel Grades | TP201 TP202 TP304 TP304L TP304H TP309S TP309H TP310S TP316 TP316L TP317 TP321 TP347 TP347H TP348 TP348H TP444,etc. |
| Equivalent Standards | EN 10216-5,JIS G 3463,ISO 2604-2 |
| Outer Diameter (OD) | 3.2 mm – 127 mm(1/8 in – 5 in) |
| Wall Thickness (WT) | 0.38 mm – 12.70 mm(0.015 in – 0.500 in) |
| Length | Up to 25 m |
| Surface Treatment | Annealed & Pickled |
| Production Process | Cold Drawn / Cold Rolled |
| Condition | Solution Annealed |
The heat exchanger stainless steel tube undergoes a specialized treatment process involving high-temperature solution annealing followed by secondary stress relief. This ensures a uniform and stable metallographic structure capable of withstanding thousands of alternating thermal cycles-ranging from -20°C to 650°C-without exhibiting thermal fatigue cracks, structural deformation, or stress cracking.
Leveraging the high chromium-nickel alloy composition inherent to stainless steel, a dense, protective oxide film forms on the tube's surface. Under operating conditions of 600°C, the high-temperature oxidation rate remains ≤0.02 g/(m²·h). This effectively safeguards against corrosive oxidation caused by sulfur dioxide, nitrogen oxides, particulate matter, and trace amounts of chlorine and sulfur-containing media present in power plant flue gases, thereby preventing tube wall thinning and leakage during prolonged operation.
Customized Services
- TORICH offers custom processing services for U-tubes, utilizing CNC bending equipment to cold-bend straight tubes based on bending radii and tube bundle layout drawings provided by the client.
- We provide custom finishing services for both plain ends and beveled ends; beveled ends can be precision-machined to specific angles designated by the client (e.g., 30° or 37.5°).
- We also offer custom cutting services for lengths ranging from 1m to 25m, with cutting tolerances controlled within ±0.5 mm.
Chemical Composition
| Element | C (%) | Mn (%) | Si (%) | Cr (%) | Ni (%) | Nb (%) | P (%) | S (%) |
|---|---|---|---|---|---|---|---|---|
| TP309H | 0.04–0.10 | ≤2.00 | ≤0.75 | 22.0–24.0 | 12.0–15.0 | - | ≤0.045 | ≤0.030 |
| TP310H | 0.04–0.10 | ≤2.00 | ≤1.50 | 24.0–26.0 | 19.0–22.0 | - | ≤0.045 | ≤0.030 |
| TP347H | 0.04–0.10 | ≤2.00 | ≤0.75 | 17.0–20.0 | 9.0–13.0 | 8×C–1.00 | ≤0.045 | ≤0.030 |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness |
|---|---|---|---|---|
| TP309H | ≥515 | ≥205 | ≥35 | ≤95 HRB |
| TP310H | ≥515 | ≥205 | ≥35 | ≤95 HRB |
| TP347H | ≥515 | ≥205 | ≥35 | ≤95 HRB |
Possible Alternative Grades
- Compared to TP309H, TP310H, and TP347H, TP304H offers lower costs while exhibiting excellent oxidation resistance within the operating temperature range of 550–650°C.
- TP321H serves as a viable alternative to TP347H; its titanium stabilization provides resistance to intergranular corrosion, making it suitable for use in superheater sections (specifically the intermediate-temperature zones).
- For high-temperature environments ranging from 600°C to 900°C, Incoloy 800H or 800HT may be selected as alternatives, offering exceptional resistance to thermal fatigue and proving highly suitable for ultra-supercritical boilers.
application areas
ASTM A213 stainless steel tubes are widely utilized in boiler heat transfer components that must withstand extreme temperature and pressure conditions, such as superheater tubes and reheater tubes.
In Steam Generation & Heat Recovery Systems, they are employed in HRSG tubing, steam coil heat exchangers, secondary heat recovery systems, and similar applications.
In Condenser & Cooling Systems, they are used in surface condensers, cooling water heat exchangers, and the like.
In Feedwater Heating Systems, they are utilized in high- and low-pressure feedwater heaters and deaerator heat exchangers.
Furthermore, they are applied in Nuclear Power Plant Systems, Ultra-Supercritical & Advanced Power Plants, as well as Biomass & Waste-to-Energy Power Plants.
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: How should tubing materials for power plant heat exchangers be selected?
A: TP304H → Clean, low-temperature flue gas & stable operating conditions
TP316H → Mildly corrosive flue gas & waste heat recovery systems
TP321H → Frequent start-stop & severe thermal cycling conditions
TP347H → High-temperature, high-pressure & highly corrosive critical sections (e.g., superheaters)
Q: What is the difference between H-grade stainless steel tubing and standard stainless steel tubing?
A: H-grade stainless steel (0.04–0.10% C) has higher carbon content, forming more stable carbides at high temperatures.
This significantly improves creep-rupture strength and long-term high-temperature performance, making it more suitable for boiler hot sections like superheaters compared to standard grades.
Q: What non-destructive testing methods are applicable to ASTM A213 tubing?
A: Every length of A213 tubing is required to undergo either a hydrostatic test or a non-destructive electric test. Additionally, Eddy Current Testing (ET) and/or Ultrasonic Testing (UT) may be performed in accordance with specific customer requirements.
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