Duplex Steel S31803 Seamless & Welded Pipes Spools manufacturer solutions by Adinox Overseas are engineered to deliver superior mechanical strength, excellent corrosion resistance, and long service life. These pipe spools are fabricated using premium-grade duplex stainless steel, ensuring outstanding performance in demanding environments such as oil & gas, chemical processing, and offshore installations. Precision manufacturing and strict quality control allow us to supply pipes spools that meet international standards and project-specific requirements.
Being one of the preferred Duplex Steel S31803 Seamless & Welded Pipes Spools suppliers, we provide customized solutions tailored to client drawings and specifications. Our seamless and welded pipe spools offer excellent resistance to stress corrosion cracking and pitting, even in chloride-rich environments. Advanced fabrication techniques help us maintain dimensional accuracy, smooth finishes, and strong weld integrity across all supplied products.
Adinox Overseas is also recognized among leading Duplex Steel S31803 Seamless & Welded Pipes Spools stockists, maintaining ready inventory to support urgent project needs. Our stock includes a wide range of sizes, schedules, and spool configurations, ensuring quick dispatch without compromising quality. This availability helps industries minimize downtime and maintain uninterrupted operations.
The versatility of Duplex Steel S31803 Seamless & Welded Pipes Spools manufacturer offerings makes them suitable for refineries, desalination plants, pulp & paper industries, and structural applications. The balanced austenitic-ferritic microstructure delivers higher yield strength compared to conventional stainless steel, resulting in cost efficiency through reduced material thickness and longer lifecycle performance.
| Material Grade | Duplex Stainless Steel S31803 (UNS S31803 / S32205 / Duplex 2205 / WNR 1.4462) |
|---|---|
| Product | Pipe spools fabricated from seamless or welded Duplex S31803 pipes, fittings & flanges |
| Material Description | 22% Cr duplex (austenitic–ferritic) stainless steel with high strength and excellent resistance to pitting, crevice and stress‑corrosion cracking in chloride‑bearing environments |
| Applicable Standards (typical) |
ASTM A790 / A790M (Seamless & Welded Duplex SS Pipe, UNS S31803 / S32205), ASTM A928 (EFW Duplex SS Pipe), ASTM A815 (Butt‑weld Fittings, UNS S31803 / S32205), ASTM A182 (Forged Fittings & Flanges, F51 / F60), ASME B36.19 / B36.10 (Pipe sizes & schedules), ASME B16.9 / B16.11 / B16.5 (Fittings & Flanges) |
| Size Range (NPS) | ½" – 24" (larger sizes on request / project basis) |
| Schedules | Sch 5S, 10S, 20, 40 / 40S, 80 / 80S, 160, XXS (as per design) |
| Pipe Type | Seamless / Welded (ERW / EFW) as specified |
| End Connections | Plain End (PE), Beveled End (BE), Threaded (NPT/BSP), Flanged, as per spool design |
| Fabrication | Cutting, fit‑up, welding, beveling, pickling/passivation, hydrotest as required by project specification |
| Welding | GTAW (TIG) / GMAW (MIG) / SMAW with qualified WPS/PQR & certified welders; matching duplex filler (e.g. ER2209 / E2209) as per spec |
| Heat Treatment | Base material solution annealed (typically 1040–1120 °C) and water quenched; no PWHT unless specified, to preserve duplex structure |
| NDT & Inspection (typical) | Visual, dimensional, hydrotest, radiography / DPI / PMI, ferrite testing as per client and code requirements |
| Corrosion Protection | Pickled & passivated, plastic end caps, suitable wrapping & packaging for shipment |
| Element | C | Mn | Si | P | S | Cr | Ni | Mo | N | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| Content (% by weight) | ≤ 0.030 | ≤ 2.00 | ≤ 1.00 | ≤ 0.030 | ≤ 0.020 | 21.0 – 23.0 | 4.5 – 6.5 | 2.5 – 3.5 | 0.08 – 0.20 | Balance |
| Property | Value (Metric) | Value (Imperial) | Remarks |
|---|---|---|---|
| Tensile Strength, min. | 620 MPa | 90 ksi | Longitudinal, at room temperature |
| Yield Strength, 0.2% offset, min. | 450 MPa | 65 ksi | Longitudinal, at room temperature |
| Elongation in 50 mm (2 in.), min. | 25 % | 25 % | Gauge length 50 mm (2 in.), longitudinal |
| Modulus of Elasticity (approx.) | 200 GPa | 29 × 106 psi | At 20 °C |
| Density (approx.) | 7.8 g/cm³ | 0.281 lb/in³ | Duplex stainless steel |
| Hardness (max, solution‑annealed) | ≤ 290 HB | ≈ 31 HRC | Maximum hardness per typical duplex specifications |
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