Products Description
Our Advantages
1. High Surface Finish
- Our pipes undergo a bright annealing process, resulting in a surface free of oxidation and impurities, making them particularly suitable for systems with high cleanliness requirements, such as condensing boilers, waste heat boilers, and superheaters.
- We utilize an advanced, fully enclosed bright annealing furnace to ensure zero oxidation and zero decarburization of the steel pipes throughout the annealing process. Furthermore, the pipes undergo 100% surface inspection, passing surface roughness testing with Ra ≤ 0.4μm.
2. High Dimensional Accuracy
- Bright Annealed Tube For Boiler is manufactured using a precision cold drawing process, involving multiple cold drawing passes to precisely control the outer diameter, inner diameter, and wall thickness of the pipe.
- Our pipes undergo real-time online dimensional monitoring during production to ensure that the outer diameter, wall thickness, straightness, etc., meet ASTM A213 standards or customer requirements.
3. Standards and Certifications
- Our Bright Annealed Tube for Boiler is manufactured strictly according to the ASTM A213 international standard and complies with ISO 9001 and ISO 14001 certification systems.
- From raw materials to finished pipes, all undergo rigorous quality testing. We offer EN 10204 3.1 factory test certificates (MTC) and can provide SGS and TÜV third-party inspection reports upon customer request.
4. Temperature Resistance & Oxidation Resistance
- Our pipes are available in high-temperature resistant materials such as TP321, TP347, and TP347H, capable of continuous operation at temperatures ranging from 450℃ to 900℃.
- Our pipes undergo bright annealing, resulting in superior oxidation resistance compared to ordinary stainless steel pipes. They produce virtually no oxide scale at high temperatures, preventing boiler system blockages from the outset.
5. Customizaed Services
- TORICH offers flexible customization services, supporting custom sizes and tolerances. For applications requiring higher purity gases, we offer electropolished surfaces.
- We provide pipe bending services, customizing shapes to suit boiler systems and offering end treatments such as flat ends, deburred ends, and chamfered ends.
application areas
- Water and steam pipes for industrial and power plant boilers
- Superheaters and reheaters
- Economizers
- Waste heat recovery boilers (WHRB)
- Heat exchangers
- High-temperature steam piping
- Boilers for chemical, petrochemical, and refinery plants
Chemical Composition
| Element | C | Mn | Si | Cr | Ni | Mo |
|---|---|---|---|---|---|---|
| TP304L | ≤0.035 | ≤2.00 | ≤1.00 | 18.0–20.0 | 8.0–12.0 | - |
| TP310S | ≤0.08 | ≤2.00 | ≤1.50 | 24.0–26.0 | 19.0–22.0 | - |
| TP316L | ≤0.035 | ≤2.00 | ≤1.00 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength 0.2% (MPa) | Elongation (%) |
| TP304L | ≥485 | ≥170 | ≥35 |
| TP310S | ≥515 | ≥205 | ≥40 |
| TP316L | ≥485 | ≥170 | ≥35 |
Possible Alternative Grades
| Alternative Grades | Reasons |
| TP321 / TP347 | It exhibits superior resistance to intergranular corrosion and better long-term high-temperature performance. |
| S32205/ S31803 | It possesses higher mechanical strength and stronger resistance to stress corrosion cracking, making it suitable for harsh pressure conditions. |
| Incoloy 800 / 800H | It is suitable for boiler environments with extreme high temperatures, high pressures, or high corrosiveness. |
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: What are the advantages of a bright annealed (BA) surface compared to pickled annealed tubes?
A: Bright annealed tubes undergo heat treatment in an oxygen-free atmosphere, resulting in a smooth, oxide-free, and bright surface. Compared to pickled annealed tubes, they offer higher surface cleanliness, better corrosion and oxidation resistance, less scaling, and higher heat transfer efficiency.
Q: Are your tubes suitable for high-temperature, high-pressure boilers?
A: Yes. Our tubes fully comply with ASTM A213/ASME SA213 standards and are designed to maintain stable mechanical properties under high temperatures and pressures. The bright annealing process ensures excellent grain structure and oxidation resistance, meeting the requirements for continuous boiler operation.
Q: How does a BA surface help reduce maintenance costs?
A: The smooth, oxide-free inner surface reduces scale buildup and scaling, extending cleaning intervals and minimizing downtime. Enhanced oxidation and corrosion resistance also reduces tube replacement frequency, thus lowering overall lifecycle maintenance costs.
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