Technical Specifications Table
| Parameter | Duplex S32205 Specification |
|---|---|
| Material Grade | ASTM A803 / A815 UNS S31803 / S32205 |
| Manufacturing Standard | ASME B16.9, MSS SP-43 |
| Size Range | 1/2" to 24" (DN15 - DN600) |
| Wall Thickness | Sch 10S, 40S, 80S, XS |
| PREN Value | ≥ 34 (Pitting Resistance Equivalent Number) |
| Surface Finish | Solution Annealed, Pickled, and Passivated |
Specialized Industrial Applications
S32205 Duplex crosses are the primary choice for chemical tankers and offshore oil and gas production where multi-directional fluid distribution is required in highly corrosive environments. They are widely utilized in seawater reverse osmosis (SWRO) desalination plants to handle high-pressure brine and intake water. In the chemical industry, these fittings are essential for organic acid processing and chloride-handling equipment. The pulp and paper industry also relies on duplex steel for digesters and bleach plant equipment. Because of their high mechanical strength, these crosses allow for weight reduction in piping systems on offshore platforms, as thinner walls can be specified compared to austenitic grades. They are also common in high-end wastewater treatment plants dealing with industrial effluent and high salt concentrations.
Duplex Performance Advantages
- High Strength-to-Weight Ratio: Superior yield strength allows for thinner pipe walls, reducing the overall weight of the piping assembly.
- Exceptional SCC Resistance: The duplex structure provides a high degree of protection against stress corrosion cracking in halide environments.
- Cost-Effective Longevity: While the initial material cost is higher, the extended service life and reduced maintenance significantly lower long-term expenses.
- Enhanced Fatigue Strength: Excellent resistance to erosion-corrosion and fatigue in pulsating flow or vibrating environments.
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