ASTM A789 Duplex steel 2205 tubing
1. Grade: TP304 / TP304L, TP316 / TP316L
2. Standard: ASTM A688
3. Manufacturing Process: Seamless & Welded
4. OD: 12.7 mm – 114.3 mm
5. Wall Thickness: 0.5 mm – 5 mm
6. Delivery Condition: Solution annealed
7. Certification: ISO9001, PED, ISO 17025 lab, TÜV certified manufacturer
Core Functions and Application:
Applied in condensers and heat exchangers requiring enhanced inspection and reliable performance.
Description
ASTM A789 Duplex Steel 2205 Tubing – High-Strength Corrosion-Resistant Solution
ASTM A789 Duplex steel 2205 tubing from YOUFASS conveys uncommon quality and erosion resistance for your most requesting applications. As one of China's Top 500 undertakings with 15 generation lines and 50,000 tons yearly capacity, we give enterprise-grade duplex tubing arrangements. Our 200+ gifted experts guarantee each tube meets strict quality guidelines, supported by ISO9001, PED, TÜV certifications and an ISO 17025-accredited lab. With conveyance in as quick as 7 days to Tianjin Port and adaptable MOQ of fair 1 pipe, we're prepared to bolster your ventures with responsive service.
What Makes Duplex 2205 Tubing Special?
Duplex 2205 combines the best of two universes. You get the durability of ferritic steel and the erosion resistance of austenitic stainless steel—all in one material.
This adjusted microstructure implies you can handle harder conditions without updating to outlandish combinations. The result? Superior execution at a more down to earth cost.
Your ventures advantage from tubing that stands up to push erosion breaking, setting, and cleft corrosion—especially in chloride-rich situations where standard stainless steel struggles.
Technical Specifications at a Glance
| Parameter | Specification |
|---|---|
| Grade | UNS S31803 / S32205 (Duplex 2205) |
| Standard | ASTM A789 / ASME SA789 |
| Outside Diameter (OD) | 12.7 mm – 114.3 mm |
| Wall Thickness (WT) | 0.5 mm – 5 mm |
| Length | Random, fixed length, or U-bent |
| Manufacturing Process | Welded |
| Heat Treatment | Solution annealed |
| Surface Finish | Bright annealed or pickled |
| Packaging | Wooden box (optional steel frame), hexagonal binding + woven bag |
Where You'll Use This ASTM A789 Duplex steel 2205 tubing
ASTM A789 Duplex steel 2205 tubing sparkles in situations where both mechanical quality and erosion resistance matter:
Oil & Gas Industry
Offshore stages, subsea pipelines, and preparing hardware confront saltwater and forceful chemicals day by day. Duplex 2205 stands up to these challenges.
Chemical Processing
Your warm exchangers, weight vessels, and channeling frameworks require materials that won't fall flat beneath acidic or chloride conditions. This tubing delivers.
Desalination Plants
Seawater is profoundly destructive. Duplex 2205's predominant chloride resistance makes it perfect for desalination and water treatment applications.
Pulp & Paper Mills
The fading prepare employments unforgiving chemicals. You require tubing that stands up to both erosion and erosion—2205 handles both.
Power Generation
Cooling frameworks, condensers, and warm exchangers in control plants advantage from the strength and life span of duplex tubing.






Why Choose YOUFASS for Your Duplex Tubing?
Proven Manufacturing Capability
Our cutting edge offices create solid tubing at scale. With 15 devoted generation lines, we meet both little custom orders and huge venture requirements.
Complete Quality Assurance
Every tube experiences thorough testing. We give total documentation: MTC/MTR (3.1/3.2), TPI, WPS/PQR, MPS, and UT/RT reports—giving you full traceability.
Flexible Service Model
Whether you require one pipe for testing or thousands for a major venture, we're prepared. Our moo MOQ and quick turnaround keep your ventures moving.
Technical Support
Our group gives direction on fabric determination, establishment contemplations, and on-site commissioning when required. You're not fair buying tubing—you're picking up a specialized partner.






Duplex 2205 vs. 316L: Understanding the Difference
Many clients inquire approximately the distinction between ASTM A789 Duplex steel 2205 tubing and standard 316L stainless steel.
Strength: Duplex 2205 offers generally twice the surrender quality of 316L. This implies you can utilize more slender dividers and decrease weight without relinquishing integrity.
Chloride Resistance: Whereas 316L performs well in numerous situations, 2205 gives predominant resistance to setting and stretch erosion splitting in chloride-containing media.
Cost Proficiency: The higher quality permits fabric reserve funds. In spite of the fact that the crude fabric taken a toll may be marginally higher, you regularly utilize less of it—resulting in generally extend savings.
Weldability: Both materials weld well, but 2205 requires cautious warm input control to keep up its adjusted microstructure. Our specialized group can give legitimate welding procedures.
Standards and Certifications:
- ISO 9001 Quality Management
- PED (Pressure Equipment Directive)
- TÜV certification.

Careful Package&Fast Delivery








Clients' approval & trust

Frequently Asked Questions
Q:What is ASTM A789 Duplex 2205 tubing?
A:It's a corrosion-resistant tubing made from duplex stainless steel—a fabric with a adjusted ferritic-austenitic microstructure. This interesting composition gives you upgraded quality and great resistance to chloride-induced corrosion.
Q:How does 2205 compare to 316L stainless steel?
A:Duplex 2205 has roughly twofold the surrender quality of 316L and altogether superior resistance to chloride setting and push erosion splitting. If your application includes seawater, brines, or forceful chemicals, 2205 is frequently the more intelligent choice.
Q:Where is duplex 2205 tubing commonly used?
A:You'll discover it in seaward oil stages, chemical handling plants, desalination offices, mash and paper plants, and marine applications. Anyplace you require both tall quality and erosion resistance, duplex 2205 performs.
Q:Can you provide small quantities for testing?
A:Absolutely. Our least arrange is fair 1 pipe. We get it you may require tests or test pieces some time recently committing to bigger volumes.
Q:What documentation do you provide?
A:We supply complete material traceability including Mill Test Certificates (MTC 3.1/3.2), Third-Party Inspection reports (TPI), Welding Procedure Specifications (WPS/PQR), Manufacturing Process Specifications (MPS), and non-destructive testing reports (UT/RT).
Ready to Upgrade Your Piping Systems?
Email us at info@youfass.com and let's discuss your application requirements for ASTM A789 Duplex steel 2205 tubing.
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