Recently, a batch of high-standard ASTM A789 S2205 (UNS S31803/S32205) duplex stainless steel heat exchanger tubes successfully passed quality inspections and has been shipped to Russia. These products are destined for use in major local oil refining and chemical processing projects, once again demonstrating our exceptional supply capabilities in the field of duplex stainless steel.
Why Do Russian Industrial Projects Favor S2205 Duplex Stainless Steel?
With the continuous growth of the oil and gas, desalination, and heavy industries within Russia, increasingly stringent demands are being placed on the corrosion resistance and high-pressure bearing capabilities of heat exchange equipment. Given the critical need for superior corrosion resistance and mechanical strength, S2205 duplex stainless steel (UNS S31803 / S32205) has emerged as the preferred material for heat exchanger applications across sectors such as oil and gas, petrochemicals, and energy.
ASTM A789 S32205 Heat Exchanger Tube Specification
Below are the detailed specifications for the delivered Russia order. Customization is available according to client requirements.
| Feature / Parameter | Detailed Specification (ASTM A789 S2205) |
|---|---|
| Standard | ASTM A789 / ASME SA789, EN 10216-5 |
| Grade | S2205 / UNS S31803 / UNS S32205 / 1.4462 |
| Outer Diameter (OD) | 12.7 mm – 76.2 mm (customizable) |
| Wall Thickness (WT) | 0.89 mm – 5.0 mm (BWG sizes available) |
| Length | Fixed length 6 m, 12 m, or U-bent tubes |
| Surface Treatment | Annealed & Pickled / Bright Annealed |
| Main Testing | Hydrostatic Test, Eddy Current Testing (ET), Ultrasonic Testing (UT), Corrosion Test (ASTM G48) |
| Delivery Condition | Straight tubes or U-bent tubes, end plastic caps protection, packed in wooden cases |
Dual Standard Compliance (International & Russian Standards)
We provide comprehensive quality documentation for S2205 heat exchanger tubes to eliminate trade barriers and ensure full compliance with international and Russian requirements.
| Certification / Standard Type | Description |
|---|---|
| MTC (Material Test Certificate) | Supplied in accordance with EN 10204 3.1 or 3.2, ensuring full traceability of raw materials and production data |
| Standard Mapping | Products fully comply with ASTM A789 / A790, with comparative performance data available against Russian GOST standards |
| Third-Party Inspection (TPI) | Pre-shipment inspection (PSI) can be conducted by SGS, Bureau Veritas, TÜV, or other authorized third-party agencies |
Quality Control: Ensuring Every Tube Complies with Russian GOST and International Standards
For this export project to Russia, we strictly implemented the following quality control procedures:
**Spectrographic Analysis (PMI):** Ensuring that the chemical composition (Cr, Ni, Mo, N) of every tube fully complies with the S2205 standard.
**Dimensional Tolerance Control:** Strictly controlling outer diameter tolerances and straightness to meet the specific installation requirements for heat exchanger tube bundles.
**Corrosion Resistance Testing:** Conducting pitting corrosion tests in accordance with the ASTM G48 standard to ensure that the S2205 material maintains a high Pitting Resistance Equivalent Number (PREN ≥ 34) in chloride-containing environments.
**Eddy Current Testing:** Conducting 100% inspection to detect cracks and defects on the surface and near-surface layers of the tubes.
**Ultrasonic Testing:** Specifically for high-pressure heat exchanger tubes, inspecting for minute defects located within the tube walls.
**Hydrostatic Testing:** Subjecting every tube to high-pressure hydrostatic testing to ensure zero leakage within high-pressure heat exchange systems.
Specialized Packaging for the Russian Climate (Arctic-Ready Packaging)
Taking into account Russia's extended transit times and severe cold climate, we have reinforced our packaging as follows:
End Protection: High-strength plastic end caps are utilized to prevent moisture ingress or contamination of the interior surfaces.
Rust Prevention: An appropriate amount of anti-rust oil is applied to the surface (upon client request), followed by packaging in hexagonal bundles or sealed wooden crates.
Robust Wooden Crates: We employ fumigation-free wooden crates-compliant with ISPM15 standards-to safeguard against mechanical damage during rail transport.
