ASME SA249 Bright Annealed Stainless Steel 304 Welded Tube For Distiller , 3 / 4" 20BWG
ASME SA249 Bright Annealed Stainless Steel 304 Welded Tube For Distiller , 3 / 4" 20BWG
ASME SA249 TP304 Bright Annealed Welded Tube is a austenitic stainless steel tube intended for use in heat exchangers, condensers, and similar heat transfer apparatus. It is manufactured from TP304 grade material, welded longitudinally, and then subjected to a final heat treatment process known as "Bright Annealing" in a controlled atmosphere furnace. This stainless steel welded tube is a high-quality welded tube designed for applications demanding excellent corrosion resistance, good mechanical properties, and a superior surface finish. The "Bright Annealing" process is key to its performance. After welding, the tube passes through a furnace with a controlled atmosphere (typically hydrogen, nitrogen, or a vacuum) at temperatures exceeding 1900°F (1040°C). YUHONG GROUP has supplied ASTM A249/ASME SA249 stainless steel welded tubes for many years and has abundant manufacturing experience. We can provide such welded tubes from 6mm to 152.4mm diameter. The length can be 35 meter maximum.
Key Advantages and Features:
- Excellent Corrosion Resistance: The TP304 alloy provides good resistance to a wide range of oxidizing environments, including many organic chemicals, food products, and atmospheric conditions.
- Superior Surface Finish: The bright annealed surface is clean, smooth, and free of scale and contaminants. This reduces fouling in heat transfer applications and improves cleanability in hygienic services.
- High Strength and Ductility: The material offers a good balance of strength for pressure containment and ductility for bending (e.g., into U-tubes) and expansion into tube sheets.
- Cost-Effective: Welded tubes are generally more economical to produce than seamless tubes, while still offering excellent performance for most applications.
Chemical Composition:
| Element | Composition Percentage (%) |
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.00 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Silicon (Si) | 1.00 max |
| Chromium (Cr) | 18.0 - 20.0 |
| Nickel (Ni) | 8.0 - 11.0 |
| Nitrogen (N) | 0.10 max |
| Iron (Fe) | Balance |
Mechanical Properties:
| Property | Value |
| Tensile Strength (min) | 515 MPa (75,000 psi) |
| Yield Strength (0.2% offset, min) | 205 MPa (30,000 psi) |
| Elongation in 2 inches (min) | 35% |
| Hardness (max) | Rockwell B 90 |
Different Applications of SS304 Welded Tubes:
- Heat Exchangers and Condensers: The most common application, used in power generation, chemical processing, and HVAC systems.
- Food and Beverage Processing: For pipelines, heat exchangers, and holding tanks due to its corrosion resistance and ease of cleaning.
- Pharmaceutical and Biotechnology: For clean steam lines, pure water systems, and process equipment requiring high purity and a non-reactive surface.
- Petrochemical and Refining: In various heat transfer equipment handling less corrosive hydrocarbons and process streams.
- Pulp and Paper Industry: In digesters, bleach washing, and recovery equipment.
- Architectural and Automotive: For decorative tubing, exhaust systems, and structural components where a bright finish is desired.
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