ASTM A403 WP321-S 180° Short Radius Elbow - Stainless Steel Pipe Fitting for Petrochemical & Power Plant Piping Systems
ASTM A403 WP321-S 180° Short Radius Elbow - Stainless Steel Pipe Fitting for Petrochemical & Power Plant Piping Systems
YUHONG GROUP specializes in manufacturing high-performance stainless steel pipe fittings for global industrial applications. With over 35 years of expertise in precision engineering, our ASTM A403 WP321-S 180° Short Radius Elbows deliver reliable performance in critical petrochemical and power plant piping systems, where high-temperature resistance and corrosion prevention are paramount.
Chemical Composition of Grade 321 (UNS S32100)
| Element | Requirement (%) |
| 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 |
| Nickel (Ni) | 9.0-12.0 |
| Chromium (Cr) | 17.0-19.0 |
Heat Treatment Requirements for Grade 321 (UNS S32100)
| Parameter | Requirement |
| Grade (WP/CR) | WP321 / CR321 |
| UNS Designation | S32100 |
| Solution Anneal Temperature, min | 1900°F [1040°C] |
| Quench Media | Water or other rapid cool |
Mechanical Properties of Grade 321 (UNS S32100)
| Property | Requirement | Notes |
| Grade | 321 | Titanium-stabilized austenitic stainless steel |
| UNS Designation | S32100 | |
| Yield Strength, min | 30 ksi [205 MPa] | 0.2% offset |
| Tensile Strength, min | 75 ksi [515 MPa] | |
| Elongation, min | 28% (Longitudinal) / 20% (Transverse) | In 4D gauge length |
ASTM A403 WP321-S 180° Short Radius Elbow - Application Advantages
1.Excellent High-Temperature Resistance
Titanium-stabilized design enables continuous service up to 800°C, making it ideal for power plant superheated steam pipelines.
2. Superior Corrosion Resistance
Chromium-nickel alloy composition effectively resists acid and chloride corrosion, suitable for petrochemical equipment.
3.Space-Saving Installation
180° short radius design reduces footprint by 40%, perfect for compact plant layouts.
4.Smooth Flow Efficiency
Polished inner surface ensures minimal pressure drop and optimal fluid dynamics.
5.Long Service Life
Complies with ASME B16.9 standards, guaranteeing reliable operation for over 20 years.
Typical Applications:
- High-temperature pipelines in petrochemical plants
- Power plant boiler steam systems
- Heat exchanger connecting piping
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