Products Description
Our Advantages
1. Excellent High-Temperature Strength
- Our pipes undergo rigorous solution annealing heat treatment and strict control over carbon content, resulting in excellent high-temperature strength and creep resistance, which extends their service life.
- The pipes undergo chemical composition analysis, high-temperature tensile testing, and stress fracture testing to ensure stable operation in high-temperature boilers, reducing the risk of deformation, cracking, or failure.
2. Good Corrosion Resistance
- ASTM A213 stainless steel boiler pipe resists corrosion from steam, condensate, water treatment chemicals, and other corrosive media, reducing the risk of pipe wall thinning and surface damage.
- We offer materials such as TP321 and TP347, which have resistance to intergranular corrosion. The pipe surface undergoes pickling and passivation treatment to restore the protective layer and enhance corrosion resistance.
3. Good Weldability and Machining Performance
- Boiler pipes require cutting, bending, and welding during the installation process. Our pipes can be welded using standard TIG/MIG processes without post-weld heat treatment, improving installation efficiency.
- Stainless steel boiler pipe is manufactured using precision cold rolling technology, ensuring accurate dimensions and uniform wall thickness. They also possess excellent ductility, allowing for cold bending and making them suitable for complex boiler geometries.
4. Quality Control
- Our pipes undergo rigorous quality testing from raw materials to finished products, including hydrostatic pressure testing, eddy current testing, and ultrasonic testing, ensuring their high-pressure resistance.
- The pipe surface undergoes strict testing to ensure it is free of scratches, pits, or heavy oxide scale, improving corrosion resistance and heat transfer efficiency.
application areas
- Power Generation: Widely used in boiler tubes, superheater head tubes, reheater tubes, and steam piping in fossil fuel and thermal power plants.
- Petrochemical Industry: High-temperature process piping, heat exchangers, and furnace tubes in catalytic reformers and steam crackers.
- Chemical Processing: Reaction vessels, distillation columns, and process heaters.
- Oil and Gas: Offshore platform processing equipment, refinery furnace tubes, and heat recovery systems.
- Pulp and Paper: Recovered boiler tubes and digesters operating in alkaline sulfide environments.
- Heat Treatment: Heat treatment furnace components, radiant tubes, and silencers.
- Waste Heat Recovery: Waste gas heat exchangers and energy savers in industrial boilers.
Chemical Composition
| Element | C (%) | Mn (%) | P (%) | S (%) | Si (%) | Cr (%) | Ni (%) | Ti (%) | N (%) | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| TP321 | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.030 | ≤0.75 | 17.0–19.0 | 9.0–12.0 | 5×(C+N)–0.70 | ≤0.10 | Bal. |
| TP321H | 0.04–0.10 | ≤2.00 | ≤0.045 | ≤0.030 | ≤0.75 | 17.0–19.0 | 9.0–12.0 | 4×(C+N)–0.70 | ≤0.10 | Bal. |
| TP310S | ≤0.08 | ≤2.00 | ≤0.045 | ≤0.030 | ≤1.50 | 24.0–26.0 | 19.0–22.0 | - | - | Bal. |
Mechanical Properties
| Property | Tensile Strength min | Yield Strength min | Elongation min | Hardness max (HBW) | Hardness max (HRB) | Modulus of Elasticity | Density |
|---|---|---|---|---|---|---|---|
| TP321 | 75 ksi / 515 MPa | 30 ksi / 205 MPa | 35% | 192 | 90 | 28×10⁶ psi / 193 GPa | 0.289 lb/in³ / 8.0 g/cm³ |
| TP321H | 75 ksi / 515 MPa | 30 ksi / 205 MPa | 35% | 192 | 90 | 28×10⁶ psi / 193 GPa | 0.289 lb/in³ / 8.0 g/cm³ |
| TP310S | 75 ksi / 515 MPa | 30 ksi / 205 MPa | 35% | 192 | 90 | 29×10⁶ psi / 200 GPa | 0.285 lb/in³ / 7.9 g/cm³ |
Possible Alternative Grades
| Alternative Grades | Reasons |
| TP304H | Suitable for low-corrosion environments below 650°C, but its stability is insufficient and may require post-weld heat treatment. |
| TP309S | A possible alternative to TP310S, with a similar chemical composition but lower nickel content, suitable for environments up to 1000°C. |
| Inconel 600 | Suitable for extreme temperature or extreme sulfide corrosion environments, with higher cost but excellent high-temperature stability. |
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: What steel grades are available for high-temperature applications?
A: We can supply various ASTM A213 stainless steel grades, such as TP304, TP304H, TP316L, TP316H, TP321, TP321H, TP347, TP347H, and TP310S.
Q: Are your boiler tubes seamless or welded?
A: Our tubes are manufactured using a precision cold-rolling process, eliminating weld seam weaknesses and ensuring stable operation under high temperature and pressure conditions.
Q: What processing services do you offer?
A: We provide precision cutting, beveling, chamfering, U-bending, and other services. For high-cleanliness applications, we offer internal and external polishing.
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