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S31803 Bright Annealed Duplex Seamless Tube – Corrosion Resistance for Heat Exchangers, Boilers, Offshore and Petrochemical Systems
| MOQ: | 1 unidade |
| Preço: | Above 2usd/kg |
| standard packaging: | Caixa de madeira compensada/estojo de ferro com tampas de plástico e proteção de PVC FLIM |
| Delivery period: | 2 semanas/recipiente |
| Método do pagamento: | L/C,D/A,D/P,T/T,Western Union,MoneyGram |
| Supply Capacity: | 200 toneladas/mês |
S31803 duplex seamless tube
,corrosion resistant stainless steel tube
,heat exchanger duplex steel tube
S31803 duplex stainless steel seamless tube combines high mechanical strength with exceptional corrosion resistance, making it an ideal material for heat exchangers, boilers, offshore platforms, and petrochemical systems.
SMLSCO operates advanced production lines including cold rolling, bright annealing, and nondestructive testing. With a global inventory network and efficient delivery capability, we respond quickly to engineering project demands. SMLSCO provides stable supply and reliable technical assurance, supporting SGS/TUV third-party inspection to ensure safety and long-term service performance.
| Attribute | Value |
|---|---|
| Material Grade | UNS S31803 |
| Size Range | 1/4" - 2" (6.35mm - 50.8mm) |
| Length | 6 meters (Fixed Length) or as required |
| Standards | ASTM A789 |
| Surface Condition | Bright Annealed |
| Testing Methods | ET / UT / PMI / Hydrotest |
| Applications | Heat Exchangers, Boilers, Offshore Piping, Petrochemical Process Lines |
S31803 provides outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking, especially suitable for chloride-containing seawater environments. Its duplex microstructure offers significantly higher yield strength, delivering superior performance under pressure. The material maintains structural stability under extreme operating conditions including high temperature, high pressure, salt spray, and sulfide environments.
S31803 seamless tubes are widely used in oil and gas extraction and offshore platform piping systems, refining and petrochemical process lines, chemical plant material transfer pipelines, seawater desalination heat exchangers, high-pressure boilers, and waste heat recovery units. With excellent mechanical strength and corrosion resistance, they operate reliably in harsh conditions such as salt-fog, acidic/alkaline solutions, chloride-rich environments, and high-temperature steam.
- High strength and corrosion resistance suitable for high-pressure and chloride environments
- 100% nondestructive testing and full quality documentation, supporting SGS/TUV third-party inspection
- Strong inventory and flexible lead time, responding quickly to project schedules
- Ideal for heat exchangers, boilers, offshore platforms, chemical transport, and water treatment systems
SMLSCO's production process includes piercing, cold rolling, solution treatment, bright annealing, pickling & passivation, straightening, and nondestructive testing. Each key step is monitored by the QC team, with photo documentation and archived records to ensure full traceability.
S31803 offers approximately twice the yield strength of 316L and superior pitting corrosion resistance, especially for seawater and chloride environments. It significantly increases system safety and reduces maintenance costs.
Yes. We fully support SGS, TUV, BV and other independent inspection agencies for comprehensive quality evaluation.
Standard specifications can be shipped within 2 weeks. Customized sizes will be scheduled based on production planning, with transparent and controllable delivery timelines.
