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by Tubotech Alloys Inc
Tubotech Alloys is a leading supplier and exporter of Duplex Steel 31803 32205 Instrumentation Fittings in the Netherlands, offering premium-quality fittings designed for demanding industrial applications. Our Duplex Steel 31803 Instrumentation Fittings and Duplex Steel 32205 Instrumentation Fittings are manufactured using high-grade raw materials to ensure superior corrosion resistance, excellent mechanical strength, and long service life.
Duplex stainless steels combine the benefits of both austenitic and ferritic stainless steels, making them highly suitable for industries operating in aggressive environments such as offshore oil & gas, petrochemicals, marine processing, power generation, and chemical plants.
Our instrumentation fittings are manufactured according to international standards and undergo strict quality inspections to guarantee precision, leak-proof performance, and durability.






Tubotech Alloys offers a comprehensive range of Duplex Steel Instrumentation Fittings, including:
These fittings are available in various sizes, pressure ratings, and customized specifications to meet specific project requirements.
| Element | UNS S31803 (%) | UNS S32205 (%) |
|---|---|---|
| Chromium (Cr) | 21.0 – 23.0 | 22.0 – 23.0 |
| Nickel (Ni) | 4.5 – 6.5 | 4.5 – 6.5 |
| Molybdenum (Mo) | 2.5 – 3.5 | 3.0 – 3.5 |
| Nitrogen (N) | 0.08 – 0.20 | 0.14 – 0.20 |
| Carbon (C) | Max 0.03 | Max 0.03 |
| Manganese (Mn) | Max 2.0 | Max 2.0 |
| Silicon (Si) | Max 1.0 | Max 1.0 |
| Phosphorus (P) | Max 0.03 | Max 0.03 |
| Sulfur (S) | Max 0.02 | Max 0.02 |
| Iron (Fe) | Balance | Balance |
| Property | Duplex Steel S31803 | Duplex Steel S32205 |
|---|---|---|
| Tensile Strength | 620 MPa Min | 655 MPa Min |
| Yield Strength | 450 MPa Min | 450 MPa Min |
| Elongation | 25% Min | 25% Min |
| Hardness | 290 HB Max | 290 HB Max |
| Density | 7.8 g/cm³ | 7.8 g/cm³ |
The superior mechanical strength of Duplex Steel 31803 and 32205 enables the fittings to withstand high-pressure and high-temperature environments while maintaining excellent structural integrity.
| Specification | Details |
|---|---|
| Product Name | Duplex Steel 31803 / 32205 Instrumentation Fittings |
| Material Grade | UNS S31803 / UNS S32205 |
| Common Grade Name | Duplex Stainless Steel 2205 |
| WNR Number | 1.4462 |
| Standards | ASTM, ASME, DIN, BS, ISO |
| Fitting Type | Double Ferrule, Single Ferrule, Compression Tube Fittings |
| Size Range | 1/8″ to 2″ (6 mm to 50 mm) |
| Tube OD Range | 2 mm to 32 mm |
| Pressure Rating | Up to 6,000 PSI (Standard) / Higher-pressure configurations available |
| Connection Type | Tube to Tube, Tube to Male Thread, Tube to Female Thread, Weld End |
| Thread Types | NPT, BSPT, BSPP, SAE, UNF |
| Temperature Range | Suitable for low and elevated temperature service |
| Manufacturing Standards | ASTM A182, ASTM A276, ASME SA182, ASME SA479 |
| Surface Finish | Mill Finish, Electro Polished, Passivated |
| Testing | PMI Test, Hydro Test, Mechanical Test, Chemical Analysis, Visual Inspection |
| Certification | EN 10204 3.1, NACE MR0175, ISO 15156 |
| Origin | Tubotech Alloys – India |
| Supply Location | Netherlands & Europe |
These fittings are crucial in ensuring smooth, dependable, and ordinary fluid and gas waft at some stage in various high-stakes programs.
Our Duplex Steel 31803 32205 Instrumentation Fittings are widely used across numerous industries in the Netherlands and globally:
Used in offshore platforms, subsea pipelines, instrumentation panels, and hydraulic systems.
Suitable for process control systems handling corrosive chemicals and gases.
Ideal for instrumentation tubing and fluid control systems exposed to aggressive media.
Provides excellent resistance against seawater corrosion and saltwater exposure.
Used in steam lines, pressure instrumentation, and control systems.
Preferred for desalination units and high-chloride water applications.
Utilized in chemical handling and process instrumentation systems.
Suitable for precision fluid handling and process control applications.
Tubotech Alloys has established itself as a trusted supplier of Duplex Steel 31803 32205 Instrumentation Fittings in the Netherlands by consistently delivering quality products and exceptional customer service.
We use certified raw materials sourced from reputed mills worldwide.
Our fittings conform to ASTM, ASME, DIN, EN, and ISO specifications.
We provide complete instrumentation fitting solutions for various industrial sectors.
High-quality products at cost-effective prices for customers across the Netherlands.
Every fitting undergoes dimensional checks, hydrostatic testing, and material verification.
Efficient logistics and inventory management ensure on-time delivery for urgent projects.
Special dimensions, pressure ratings, and material specifications are available on request.
Tubotech Alloys ensures safe packaging of Duplex Steel 31803 / 32205 Instrumentation Fittings using:
This guarantees damage-free transportation and delivery throughout the Netherlands and Europe.
Duplex Steel 31803 and 32205 Instrumentation Fittings are high-strength stainless steel fittings designed for fluid and gas instrumentation systems requiring excellent corrosion resistance and durability.
Duplex Steel 32205 has a more tightly controlled chemical composition with higher nitrogen content, providing improved corrosion resistance and mechanical properties compared to 31803.
These fittings are commonly used in oil & gas, petrochemical, marine, desalination, power generation, and chemical processing industries.
Their exceptional resistance to chloride-induced stress corrosion cracking and seawater corrosion makes them ideal for offshore and marine environments.
Tubotech Alloys offers certified quality products, competitive pricing, international standard compliance, custom manufacturing capabilities, and reliable delivery across the Netherlands.
Upgrade your assembly with Tubotech for excellence and built to closing. Contact us nowadays to get a quote or examine more about our product range.
Tubotech delivers precision-engineered tubing, fittings, and fasteners with innovative solutions and customizable options. Trusted for quality and durability, we serve industries requiring reliable, high-performance piping and instrumentation products.
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