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ASTM A270 TP316L Seamless Steel Square Fin Tube For Heat Exchanger and Condenser
Manufactured from seamless TP316L stainless steel tubes (ASTM A270 compliant) with welded square fins, delivering superior corrosion resistance and heat transfer efficiency. Suitable for some harsh environments with heavy dust.
1.H-type Fin Tube Related Overview
• The fin is divided into two symmetrical half pieces. The tube wall is pressed down from both sides, and resistance welding is used to weld on the pipe wall with a certain gap left in the middle;
• Two circular tubes can share a group of fins, called double tube H-shaped fins, or a single tube H-shaped fin can be placed in the middle;
• The heat exchanger composed of H-type finned tubes is closely arranged and the tube bundles are arranged in order;
• The fins are parallel and independent of each other, and there is no influence of helix angle, so it is easy to remove ash.
2.Chemical & Mechanical Properties
ASTM A270 TP316L Chemical Composition (%)
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| Cr | Ni | Mo | C | Mn | Si | P | S |
| 16.0-18.0% | 10.0-14.0% | 2.0-3.0% | ≤0.03% | ≤2.0% | ≤1.0% | ≤0.045% | ≤0.030% |
Mechanical Properties
| Component | Mechanical Performance | Key Features |
ASTM A270 TP316L
Base Tube | · Tensile Strength: ≥ 170 MPa (25 ksi)
· Yield Strength: ≥ 485 MPa (70 ksi)
· Elongation(2 inches): ≥ 35% in 50 mm
· Hardness: ≤ 95 HRB | · Made of TP316L ultra-low carbon stainless steel with ≥2% Mo content, significantly enhancing chloride resistance. · Cold-rolled/cold-drawn process with inner surface roughness Ra≤0.8μm, meeting sanitary fluid transfer requirements. · Resists acid/alkali corrosion, operating temperature range -196°C to 400°C. |
3. Key Features
- Innovative H-type double-fin structure increases heat transfer area by 40% compared to round fins, while significantly reducing fouling risk.
- Laser welding technology ensures bond strength ≥200MPa between fins and base tube, eliminating contact thermal resistance completely.
- Special serrated design improves air-side heat transfer coefficient by 25-30%, suitable for high-dust environments.
- TP316L base tube with ≥2.1% Mo content passes 500-hour salt spray test.
4. Key Applications
1. Power Industry:
2. Petrochemical Industry:
3. Environmental Protection:
4. Special Industries:
Product Tags:
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ASTM A270 TP316L Seamless Steel Square Fin Tube For Heat Exchanger Condenser Images
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