ASTM A403 WP321H-S 180° Return Bends: High-Temp Resistant Stainless Steel for Furnace Piping
Yuhong Holding Group presents ASTM A403 WP321H-S 180° return bends, engineered for critical furnace connections in corrosive and high-temperature environments. These elbows ensure seamless flow in finned tube systems, combining durability with precision performance.
Material & Chemistry
Crafted from TP321H-S stainless steel, stabilized with titanium to resist carbide precipitation, ideal for elevated temperatures:
| Type | Radius | Size Range |
| Short Radius | R=1.0 x Nominal Dia. | 1/2" - 24" |
| Customized | As per requirement | Available |
Chemical Composition:
| Element | C | Mn | P | S | Si | Cr | Ni |
| % | 0.04-0.10 | ≤2.00 | ≤0.045 | ≤0.03 | ≤1.00 | 17-19 | 9-12 |
Mechanical Properties:
| Property | Tensile Strength | Yield Strength | Elongation | Max Operating Temp | Corrosion Resistance |
| Value | ≥515 MPa | ≥205 MPa | ≥30% | 870°C | Excellent in oxidizing environments |
Manufacturing & Design
- Precision Forging: Ensures uniform wall thickness and tight radius tolerance (1.5D standard).
- Solution Annealing: 925–1010°C heat treatment enhances grain structure for high-temperature stability.
- HF Weld Compatibility: Matches finned tube systems with seamless integration in heater circuits.
Applications
Perfect for:
- Industrial furnace radiant coils
- Petrochemical reformer units
- Waste heat recovery systems
Key Advantages
- Carbide Stability: Titanium addition prevents intergranular corrosion under cyclic heating.
- Thermal Fatigue Resistance: Handles rapid temperature fluctuations common in furnace operations.
- Dimensional Accuracy: Tight tolerances reduce flow turbulence and pressure drop.
FAQ
Q: Can these bends be used with acidic fuels?
A: Yes, TP321H-S resists sulfuric and nitric acid corrosion typical in industrial exhaust.
Q: What sizes are available?
A: Standard sizes ½"–12", with custom dimensions for specific furnace layouts.
About Yuhong Holding Group
With 20 years exporting to 80 countries, we rank among China’s top 5 finned tube suppliers. Our 20,000㎡ facility houses 55 production lines and 110 experts, delivering advanced heating components. We offer full-range accessories, from elbows to custom fittings, backed by strict quality controls.
