25mm Diameter UNS S31803 ASME SA789 for Petrochemical Applications
25mm Diameter UNS S31803 ASME SA789 Pipe for Petrochemical Applications
Introduction:
The 25mm diameter UNS S31803 duplex stainless steel pipe manufactured to ASME SA789 standards is a high-performance solution designed for petrochemical, chemical, and industrial fluid transport systems. Combining the strength of ferritic steel with the corrosion resistance of austenitic steel, this duplex pipe offers superior durability, high tensile strength, and resistance to chloride-induced stress corrosion. Its seamless or welded construction ensures reliable high-pressure performance, while the smooth pickled and passivated surface enhances fluid flow efficiency and minimizes fouling, making it ideal for offshore, chemical, and industrial pipelines.
Material Table:
| Material Grade | Description | Key Properties |
|---|---|---|
| UNS S31803 | Duplex Stainless Steel | High strength and corrosion resistance, excellent performance in chloride and petrochemical environments |
Specifications Table:
| Parameter | Value / Range |
|---|---|
| Standard | ASME SA789 |
| Pipe Type | Seamless / Welded |
| Outer Diameter (OD) | 25mm |
| 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 | Premium duplex stainless steel billets |
| Forming | Hot or cold forming into pipe shape |
| Welding | TIG / MIG welding for strong, uniform joints |
| Heat Treatment | Solution annealing to optimize mechanical properties and corrosion resistance |
| Surface Treatment | Pickling and passivation for smooth and corrosion-resistant surface |
| Inspection & Testing | Hydrostatic, ultrasonic, and dimensional inspections |
| Packaging | Protective packaging to prevent damage during transport |
Uses / Applications Table:
| Industry / Application | Description |
|---|---|
| Petrochemical Industry | High-pressure chemical fluid transport |
| Chemical Processing | Pipelines for acids, alkalis, and aggressive chemicals |
| Offshore & Marine Systems | Corrosion-resistant seawater and brine transport |
| Power Generation | Condensers, heat exchangers, and cooling pipelines |
| Industrial Fluid Transport | High-temperature and high-pressure industrial systems |
Advantages:
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High Strength: Duplex structure withstands high-pressure and high-temperature fluids.
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Corrosion Resistance: Excellent resistance to chloride-induced pitting and crevice corrosion.
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Durable & Reliable: Long service life with minimal maintenance.
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Smooth Internal Surface: Reduces scaling, fouling, and improves fluid efficiency.
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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 in offshore petrochemical pipelines?
A: Yes, UNS S31803 duplex stainless steel provides excellent resistance to chloride and seawater corrosion. -
Q: Are custom lengths and wall thicknesses available?
A: Yes, outer diameter, wall thickness, and length can be tailored to project requirements. -
Q: Is it suitable for high-temperature chemical transport?
A: Absolutely, this duplex stainless steel pipe is designed for extreme industrial conditions. -
Q: How is quality ensured?
A: Pipes undergo hydrostatic, ultrasonic, and dimensional inspections according to ASME SA789 standards.
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