Products Description
ASTM A249 Welded Stainless Steel Tube
Advantages of ASTM A249 Welded Stainless Steel Tube
- Excellent Formability and Weldability: ASTM A249 Welded Stainless Steel Tube can be bent into U-shapes, coiled, flared, or fabricated without cracking, making it suitable for custom designs and complex layouts.
- Smooth Surface: TORICH ASTM A249 Welded Stainless Steel Tube is ball-formed and bright-annealed to achieve uniform wall thickness and a smooth inner diameter surface, maximizing heat transfer efficiency and minimizing scaling, thereby reducing operating costs and extending maintenance intervals.
- High-Temperature Resistance: ASTM A249 Welded Stainless Steel Tube offers excellent high-temperature strength and oxidation resistance, especially grades TP310 and TP347H, which maintain the structural integrity of superheater, reheater, and economizer tubes, reducing the risk of failure under high-pressure steam conditions.
applications of ASTM A249 Welded Stainless Steel Tube
- Power Generation: Boiler tubes, superheater coils, reheater and economizer tubes, etc.
- Heat Exchangers and Condensers: Shell-and-Tube heat exchangers, process condensers and feedwater heaters, air-cooled heat exchangers, etc.
- Chemical and Petrochemical: Process heat exchangers and condensers, corrosion-resistant process piping, etc.
- HVAC and Refrigeration: Chilled water coils and air preheaters, heat recovery units, etc.
- Marine and Desalination: Seawater cooling condensers, desalination plant heat exchangers, offshore platform process coolers, etc.
Chemical Composition of ASTM A249 Welded Stainless Steel Tube
| Grade | C (max) | Mn (max) | P (max) | S (max) | Si (max) | Cr | Ni | Mo |
| TP201 | 0.15 | 7.50 | 0.060 | 0.030 | 1.00 | 16.0–18.0 | 3.5–5.5 | – |
| TP305 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0–19.0 | 11.0–13.0 | – |
| TP310 | 0.25 | 2.00 | 0.045 | 0.030 | 1.50 | 24.0–26.0 | 19.0–22.0 | – |
| TP347H | 0.08–0.10 | 2.00 | 0.045 | 0.030 | 0.75 | 17.0–19.0 | 9.0–13.0 | – |
Mechanical Properties of ASTM A249 Welded Stainless Steel Tube
| Property | Tensile Strength | Yield Strength (0.2% offset) | Elongation | Hardness |
| Requirement | ≥ 515 MPa | ≥ 205 MPa | ≥ 35% | ≤ 90 HRB |
Possible Alternative Grades
- TP202: An alternative to TP201, offering slightly higher corrosion resistance and improved toughness, suitable for moderately corrosive environments.
- TP321: A titanium-stabilized austenitic stainless steel, an excellent alternative to TP304 or TP305, suitable for intermittent or continuous high-temperature service applications to prevent intergranular corrosion.
- TP347: A columbium/tantalum-stabilized stainless steel, comparable to TP347H but with a lower carbon content, suitable for general use.
- TP316Ti: A titanium-stabilized version of TP316L, offering improved resistance to sensitization in high-temperature service.
- Nickel alloys (e.g., Alloy 600, 625): Suitable for extremely corrosive or high-temperature environments where stainless steel may not be suitable.
Packaging
Once the pipes have passed all inspections and tests, they are ready for packaging. They are usually packaged in bales wrapped in plastic. The pipes can be bundled and ready for delivery according to customer requirements, ensuring that the pipes are protected during transportation and prevent surface damage.
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