Successfully Delivered S2205 DN800 PN10 Flanges To The Netherlands
Jun 16, 2026
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S2205 DN800 PN10 Duplex Stainless Steel Flanges Successfully Exported to the Netherlands for Water Treatment Project
GNEE recently completed the successful delivery of 24 pieces of S2205 DN800 PN10 duplex stainless steel flanges for a water treatment project in the Netherlands. Manufactured in accordance with ASTM A182 F51 and EN 1092-1 standards, the flanges underwent 100% PMI verification, dimensional inspection, and EN 10204 3.1 certification review, achieving a 100% inspection pass rate before shipment. With a total shipment weight exceeding 4.5 metric tons, the order was completed and dispatched within 18 days, ensuring full compliance with the customer's stringent requirements for corrosion resistance, material traceability, and dimensional accuracy in a chloride-containing service environment.
2205 Duplex Stainless Steel Flanges Specifications
| Nominal Size (DN) | Pressure Rating (PN) | Flange OD (D) | Bolt Circle (K) | No. of Holes (n) | Bolt Hole Dia (L) | Bolt Thread (Th) | Flange Thickness (b) | Approx. Weight (kg) |
| DN 800 | PN 10 | 1015 mm | 950 mm | 24 | 33 mm | M30 | 48 mm (Type 01) | ~158 kg (Type 01) |
| DN 800 | PN 10 | 1015 mm | 950 mm | 24 | 33 mm | M30 | 52 mm (Type 11) | ~235 kg (Type 11) |
Chemical Composition (S32205 / UNS S32205)
| Grade | C (Max) | Mn (Max) | Si (Max) | P (Max) | S (Max) | Cr | Ni | Mo | N | PREN |
| S32205 | 0.030 | 2.00 | 1.00 | 0.030 | 0.020 | 22.0–23.0 | 4.5–6.5 | 3.0–3.5 | 0.14–0.20 | ≥ 35 |
Mechanical Properties (At Room Temperature)
| Grade | Yield Strength (0.2% Offset) | Tensile Strength (Rm) | Elongation (A5) | Impact Energy (KV) | Hardness (HBW) | Microstructure |
| Units | ≥ MPa | MPa | ≥ % | ≥ Joules (-40°C) | Max | Ferrite/Austenite |
| S32205 | 450 | 640 – 840 | 25 | 40 J | 290 | 40% – 60% |
Why S32205 Has Become the Preferred Choice for Dutch Municipal Engineering?
- Enhanced Pitting Resistance: The water environments in the Netherlands are highly complex, with fluctuating chloride ion concentrations. While 316 stainless steel has a Pitting Resistance Equivalent Number (PREN) of approximately 24, S32205 boasts a PREN as high as 35. This represents an increase in pitting resistance of over 45%.
- Superior Strength & Lightweight Design: The yield strength of 2205 duplex stainless steel (≥450 MPa) is 2.2 times that of 316. When dealing with large flanges such as DN800, this higher strength ensures a more generous safety margin within a PN10 pressure environment. Furthermore, optimizing the wall thickness design effectively reduces the overall dead weight of the piping system.
- Long-Term Reliability: The outstanding resistance of 2205 to Stress Corrosion Cracking (SCC) ensures that the water treatment plant can operate for the next 25 years without any downtime caused by corrosion-induced leakage at the connection joints.
| Property | 304 | 316L | S2205 |
|---|---|---|---|
| Yield Strength | 205 MPa | 220 MPa | 450 MPa |
| PREN Value | 18-19 | 24-27 | 35-38 |
| Chloride Resistance | Good | Better | Excellent |
| Service Life in Seawater | 10-20 Years | 20-30 Years | 30-50+ Years |
Quality Control
- 100% PMI Testing: We perform Positive Material Identification (PMI) on every single DN800 flange using handheld spectrometers. This chemical composition analysis ensures that core elements such as Cr, Ni, Mo, and N precisely meet specification standards.
- EN 10204 3.1 Certification: A comprehensive Material Test Certificate (MTC) is provided with each shipment. It covers chemical composition, mechanical properties, and heat treatment records, supporting full-process traceability.
- Precision Dimensional Tolerances: Compliant with the EN 1092-1 Type 01/11 standards, our DN800 flanges feature flatness and bolt-hole tolerances that far exceed industry averages, ensuring a perfect fit-up with local Dutch piping systems.
| Inspection Item | Standard |
|---|---|
| Raw Material PMI | ASTM A182 F51 |
| Chemical Analysis | EN 10088 |
| Dimension Inspection | EN 1092-1 |
| Ferrite Content Test | ASTM E562 |
| Ultrasonic Testing | ASTM A388 |
| Visual Inspection | 100% |
| MTC Certificate | EN10204 3.1 |
"Please find attached the PMI test report for our 2205 stainless steel flanges for your review."
High-quality sea freight packaging
To ensure the safety of large-diameter S2205 DN800 PN10 duplex stainless steel flanges during international transit, each unit undergoes a rigorous export packaging process following final inspection. Precision-machined sealing surfaces are protected by durable plastic covers to prevent scratches or impact damage. Subsequently, the flanges are wrapped in moisture-proof film and anti-rust materials, then securely fastened to fumigation-free wooden pallets or reinforced export-grade wooden crates.
For extra-large DN800 flanges weighing between 180 and 250 kg, customized steel-reinforced packaging is utilized to prevent shifting during maritime transport. Each package is clearly marked with the heat number, material grade (UNS S32205), specifications, and project identification.
GNEE supplies ASTM A182 F51/F60 duplex stainless steel flanges from DN15 to DN2000, including weld neck, slip-on, blind, threaded, and custom-designed flanges. Contact our engineering team today for technical support, drawings review, and competitive project quotations.
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