Duplex Stainless Steel Pipe S31803 ASME SA789 50.8mm – Corrosion-Resistant Pipe for Chemical and Petrochemical Applications
Introduction:
The S31803 duplex stainless steel pipe with a 50.8mm diameter, manufactured to ASME SA789 standards, is a high-performance solution for chemical and petrochemical industries. Designed for corrosive, high-pressure, and high-temperature environments, this pipe combines the strength of ferritic stainless steel with the corrosion resistance of austenitic steel, providing superior durability and reliability. Its duplex structure ensures resistance to chloride-induced stress corrosion, pitting, and crevice corrosion, making it ideal for industrial chemical processing, petrochemical pipelines, and offshore applications.
Material Table:
| Material Grade | Description | Key Properties |
|---|---|---|
| S31803 Duplex Stainless Steel | Ferritic-austenitic stainless steel | Excellent corrosion resistance, high tensile strength, ideal for chemical and petrochemical piping |
Specifications Table:
| Parameter | Value / Range |
|---|---|
| Standard | ASME SA789 |
| Pipe Type | Seamless / Welded |
| Outer Diameter (OD) | 50.8mm |
| Wall Thickness (WT) | 2mm – 6mm |
| Length | 6m / 12m |
| Surface Finish | Pickled & Passivated / Polished |
| Connection Type | Butt-welded / Flanged |
| Pressure Rating | Up to 100 bar (depending on schedule) |
Manufacturing Process Table:
| Step | Description |
|---|---|
| Raw Material Selection | High-quality duplex stainless steel billets |
| Forming | Hot or cold forming into pipe shape |
| Welding | TIG / MIG welding for strong and uniform joints |
| Heat Treatment | Solution annealing to optimize corrosion resistance and mechanical properties |
| Surface Treatment | Pickling and passivation for smooth, corrosion-resistant surface |
| Inspection & Testing | Hydrostatic, ultrasonic, and dimensional inspections |
| Packaging | Protective packaging for safe delivery |
Uses / Applications Table:
| Industry / Application | Description |
|---|---|
| Chemical Industry | Transport of acids, alkalis, and corrosive chemicals |
| Petrochemical Industry | High-pressure pipelines in refineries and process systems |
| Offshore & Marine | Seawater piping and corrosion-resistant applications |
| Power Generation | Process and cooling pipelines in power plants |
| Water Treatment & Desalination | Piping for industrial water and brine systems |
Advantages:
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High Strength: Duplex structure provides superior mechanical performance for high-pressure systems.
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Corrosion Resistant: Excellent resistance to chloride, pitting, and crevice corrosion.
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Durable & Long-Lasting: Minimal maintenance with extended service life.
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Smooth Surface Finish: Reduces scaling, fouling, and contamination risk.
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Versatile Applications: Ideal for chemical, petrochemical, offshore, and industrial pipelines.
FAQ:
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Q: Can this pipe be used for seawater or chloride-containing fluids?
A: Yes, S31803 duplex stainless steel provides excellent resistance to chloride-induced corrosion. -
Q: Are custom sizes available?
A: Yes, outer diameter, wall thickness, and length can be customized to project requirements. -
Q: Can it handle high-pressure pipelines?
A: Absolutely, S31803 duplex steel is designed for high-pressure chemical and industrial applications. -
Q: How is quality ensured?
A: Pipes undergo hydrostatic, ultrasonic, and dimensional inspections in accordance with ASME SA789 standards.
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The S31803 duplex stainless steel pipe 50.8mm ASME SA789 offers high strength, corrosion resistance, and long-term reliability, making it the ideal choice for chemical, petrochemical, offshore, and industrial fluid transport applications.