SMLSCO is a global inventory-based supply chain enterprise specializing in stainless steel and nickel alloy piping systems. We focus on Seamless Pipe, Seamless Tube, Flanges, and Fittings. We have established an integrated system covering production, inspection, warehousing, packaging, and logistics, enabling fast delivery worldwide. SMLSCO maintains a complete quality traceability system, and all products undergo strict standard testing. We support third-party certifications and provide stable, reliable industrial-grade supply capability.
| Attribute | Value |
|---|---|
| Product Name | ASTM A789 Cold Drawn 2205 Super Duplex Seamless Tube |
| Size | 3/4" OD * 0.065" WT (19.05mm * 1.65mm) |
| Manufacturing Process | Cold Drawn + Bright Annealed |
| Standard | ASTM A789 |
| Grade | UNS S32205 / Duplex 2205 |
| Tensile Strength | ≥ 620 MPa |
| Yield Strength | ≥ 450 MPa |
| Elongation | ≥ 25% |
| Hardness | ≤ 290 HB |
| Density | 7.8 g/cm³ |
| Certification | PED / ISO / AD2000 |
To ensure safety during long-distance transportation, each tube is individually wrapped with plastic film and equipped with end caps for protection. The outer layer is packed with woven bags or reinforced wooden cases to prevent surface scratches and deformation. Multiple shipping modes are supported, including sea freight, air freight, and land transportation.

2205 seamless tubes are widely used in extreme corrosion and high-pressure systems. Typical industries include offshore oil & gas transmission systems, chemical processing and chloride pipelines, seawater desalination and marine cooling systems, pulp and paper mills, high-pressure heat exchanger tube, and municipal energy distribution pipelines. With a PREN ≥ 35, they provide reliable resistance against pitting corrosion and are an industrial-grade alternative to 316L.
Q1: What is the main difference between 2205 and 316L?
A1: 2205 duplex stainless steel has higher strength and significantly better resistance to chloride corrosion. It performs longer in seawater and high-chloride environments, making it a high-performance replacement for 316L.
Q2: What are the advantages of Bright Annealed (BA) tubes?
A2: Bright annealing is performed in a controlled protective atmosphere, ensuring a mirror-like internal and external surface without oxide scale. It greatly enhances corrosion resistance and internal cleanliness, especially suitable for high-purity fluid service.
Q3: Do you support third-party testing and certification?
A3: Yes. We support SGS / TUV / BV inspection.