2205 duplex stainless steel Supplier. Contact us to get free quote and sample!
2205 duplex stainless steel (UNS S32205/S31803) pipes, with their superior strength, unparalleled resistance to chloride stress corrosion cracking, excellent comprehensive corrosion resistance, and significant life cycle cost advantages, have become an irreplaceable and preferred material for highly corrosive and chlorine-containing working conditions in core chemical industries such as refining, petrochemicals, chlor-alkali, fertilizers, and environmental protection.
Super Duplex 2205 s31803 Pipe supplier
HT PIPE is a leading stockist and global exporter with over 15 years of expertise in international trade. We supply astm a928 s31803 2205 pipes, plates, round bars, and a comprehensive range of pipe fittings, flanges, and valves. Contact us now for free quotes and personalized product information.
Standard Scope of Compliance
Material Specifications: ASTM A790 / ASME SA790 (Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe)
Dimensional Tolerances: ASME B36.19M and ASME B36.10M
Size Range: * Seamless (SMLS): 1/2" NB to 8" NB (Nominal Bore)
Welded (ERW, EFW, SAW): 2" NB to 24" NB
Wall Thickness Schedules: Schedule 10S, Schedule 40S, Schedule 80S, and Schedule XS/XXS
Why should you choose Stainless steel s31803?
s32205 pipe Perfect Balance of Strength and Toughness
Ultra-High Strength: Yield strength (≥450 MPa) and tensile strength (≥620 MPa) are typically twice that of ordinary austenitic stainless steels (such as 316L). This means that pipe wall thickness can be reduced at the same design pressure, significantly reducing material usage, weight, and installation costs.
Good Toughness: Its excellent impact toughness (especially at low temperatures) and ductility enable it to withstand mechanical shock, pressure fluctuations, and thermal stresses, enhancing system safety.
s31803 super duplex pipe Unparalleled Corrosion Resistance
- Chloride Stress Corrosion Cracking: This is 2205's most striking advantage. Its SCC resistance far exceeds that of 304/316L austenitic stainless steel and even outperforms many high-nickel alloys. It performs exceptionally well in hot water, seawater, saline solutions, bleach, and process fluids containing chloride ions (Cl⁻), addressing a common problem in chemical pipelines.
- Excellent resistance to pitting and crevice corrosion: High chromium, molybdenum, and nitrogen content imparts an extremely high pitting equivalent value (PREN ≥ 35), resulting in exceptional resistance to localized corrosion in acidic chloride environments and halide-containing media.
- Universal corrosion resistance: It offers excellent resistance to a wide range of inorganic acids (such as sulfuric acid, phosphoric acid, and organic acids), alkalis, and saline solutions. Its uniform corrosion resistance is comparable to or better than that of 316L.
Applications of 2205 Pipes in Core Chemical Industries
2205 steel pipe in Refining and Petrochemicals
- Atmospheric and Vacuum Units: Processing environments for high-temperature, sulfurous, and salty crude oil, and overhead condensation cooling systems (containing HCl, H₂S, and H₂O) for oil, gas, and condensate pipelines.
- Catalytic Cracking/Hydrocracking: Sulfur- and ammonia-containing wastewater stripping towers and associated pipelines, exposed to process water and acidic water containing H₂S, NH₃, and CN⁻.
- Sour Water Stripping Units: Core pipelines for treating high-sulfur and ammonia-containing wastewater.
- Seawater Cooling Systems: Seawater heat exchanger tube and shell inlet and outlet piping, and seawater injection piping, effectively addressing chloride corrosion.
- Chlorine-Containing Process Media: Such as chlorinated solvent transport pipelines.
uns s32205 pipe in Chemical Industry
- Chlor-alkali Chemical Industry: Production and transportation pipelines for brine refining (containing hypochlorite), wet chlorine gas (after cooling), dilute chlorine water, and bleaching agents (sodium hypochlorite, chlorine dioxide). This product is a cost-effective alternative to graphite, rubber-lined pipes, and titanium.
- Fertilizer Industry: High-pressure piping for highly corrosive media such as ammonium methylate and ammonium carbamate in urea plants (can replace 316Lmod in some conditions). Piping for fluorine-, chlorine-, and phosphoric acid-containing media in phosphate fertilizer production.
- Fine Chemicals and Pharmaceuticals: Feed, discharge, and process circulation pipelines for reactors, crystallizers, and dryers, particularly suitable for complex media containing halides, organic acids, and salts.
- Hydrometallurgy: Piping for slurry and acid solutions in high-pressure acid leaching (HPAL) processes.
2205 material in Oil and Gas Production and Processing (Upstream)
- Offshore Platforms: Seawater firefighting systems, seawater cooling systems, water injection systems for chlorinated oilfields, and process piping in oil and gas processing that still contains trace amounts of chloride ions after desalination and dehydration.
- Onshore Oil and Gas Fields: Produced fluid gathering and transportation pipelines containing high levels of CO₂, H₂S, and Cl⁻ (formation water), and process piping in treatment plants. Used where higher strength and superior SCC resistance are required than 316L.
- Liquefied Natural Gas: Seawater intake and drainage piping at LNG receiving stations.
super duplex steel pipe 2205 in Environmental Protection and Desulfurization
- Flue Gas Desulfurization: Clean flue gas from the absorber outlet of wet flue gas desulfurization (FGD) systems, and wet flue gas piping before and after the reheater (containing condensed acid, residual SOx, and Cl⁻), replacing expensive nickel-based alloys or lined pipes.
- Wastewater Treatment: Process piping and sludge transport pipelines in industrial wastewater treatment plants containing high levels of salt, chloride ions, and heavy metals.
