Products Description
Our Advantages
1. Excellent Corrosion Resistance
- Bright Annealed Tube is made from superior stainless steel material, and the bright annealing treatment enhances their resistance to acids, alkalis, chlorine-containing chemicals, and oxidizing and reducing media.
- The tubes are tested by a spectrometer to ensure that the chemical composition of the material meets the ASTM A269 standard. They also undergo intergranular corrosion tests and pitting corrosion tests to ensure their durability in chemical processing applications.
2. High Surface Finish
- Our stainless steel tubes are bright annealed under controlled hydrogen atmosphere to prevent oxidation and scaling, resulting in a smooth surface free from discoloration, scaling, or surface defects, thus reducing corrosion.
- Before annealing, the Bright Annealed Tube is pickled to remove surface scale, rust, and dirt, ensuring that the tubes are defect-free after annealing, with an inner surface roughness Ra ≤ 0.4 μm.
3. Excellent Machinability
- Chemical pipelines require welding, bending, and flanging during installation. Our tubes, processed with the bright annealing process, have excellent ductility and tensile strength, making them easier to cut, bend, or form and less prone to cracking.
- The tubes undergo rigorous mechanical performance testing to ensure that their tensile strength meets the ASTM A269 standard.
4. Quality Control
- The tubes undergo hydrostatic testing to ensure no leakage risk under high pressure. The tubes undergo strict dimensional inspection to ensure they meet customer requirements.
- Each of our tubes is stamped with the furnace number, batch number, specifications, and production date, ensuring traceability to every process from raw materials, annealing, tube manufacturing, and testing.
5. Customized Services
- We provide customized services for tube material, size, and standards; lower roughness is available for high-purity gas delivery.
- We support services such as precision cutting (burr-free), beveling (30°/45° V-type/U-type bevel), flange welding, and pre-assembly of compression fittings.
application areas
Bright annealed (BA) stainless steel tubes offer advantages such as a clean surface, strong corrosion resistance, and stable mechanical properties, making them ideal for chemical applications. Examples include:
- Chemical transport and distribution pipelines
- Acid treatment systems
- Chemical reactor piping
- Shell and tube heat exchangers, condensers, and coolers
- Sampling lines, impulse lines, and control systems
- High-purity chemical delivery systems
- CIP (Clean-in-Place) and process cleaning lines
- Waste chemical and wastewater treatment
Chemical Composition
| Element | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) | Ti (%) |
|---|---|---|---|---|---|---|---|---|---|
| 304 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 18.0–20.0 | 8.0–10.5 | - | - |
| 316 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 | - |
| 321 | ≤0.08 | ≤1.00 | ≤2.00 | ≤0.045 | ≤0.030 | 17.0–19.0 | 9.0–12.0 | - | ≥5×C |
Mechanical Properties
| Property | Tensile Strength (MPa) | Yield Strength 0.2% (MPa) | Elongation (%) | Hardness (HB) |
| 304 | ≥515 | ≥205 | ≥40 | ≤201 |
| 316 | ≥515 | ≥205 | ≥40 | ≤217 |
| 321 | ≥515 | ≥205 | ≥40 | ≤217 |
Possible Alternative Grades
| Alternative Grades | Reasons |
| 904L (UNS N08904) | It possesses strong resistance to pitting and crevice corrosion and is widely used in sulfuric acid processing equipment for handling highly corrosive media in chemical and fertilizer plants. |
| 254 SMO(UNS S31254) | It exhibits excellent resistance to chloride corrosion, making it suitable for high-chloride chemical processing systems, seawater and brine treatment, and bleaching plants. |
| 2205 (UNS S32205) | With higher mechanical strength and chloride resistance, it is commonly used in chemical storage tanks, pressure vessels, and piping systems that come into contact with chlorine-containing chemicals and operate under moderately high pressure. |
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
FAQ
Q: What are Bright Annealed (BA) Stainless Steel Tubes?
A: Bright annealed tubes are stainless steel tubes that have been annealed in a controlled atmosphere (hydrogen or vacuum) to prevent oxidation. They offer excellent corrosion resistance, ease of cleaning, and dimensional stability, making them ideal for chemical processing applications.
Q: Why are BA tubes suitable for chemical processing applications?
A: BA tubes offer high corrosion resistance, a smooth inner surface, low contamination risk, and excellent processing characteristics. These properties ensure the safe transport of chemicals in corrosive processing environments, ease of cleaning, and a long service life.
Q: What surface roughness can be achieved with BA tubes?
A: Our BA tubes have a surface roughness of Ra ≤ 0.4μm. Tighter surface finish requirements can be provided upon request, depending on the tube size and grade.
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