Duplex 2205 Stainless Steel Round Tube
Type:Seamless/welding
Technique:Cold rolled/Hot rolled
Material:Stainless Steel
Surface Treatment:Polished,2b, Ba, No.1, No.4, Hl, 8K, etc
Section Shape:Round
Process: Annealing, Pickling, Passivation
Length:1-18000mm
Thickness:1-65mm Customize:Yes End: PE Be
Transport Package:Wooden Case
HS Code:7210300000
If you have any projects involving 2205 or UNS S31803 stainless steel pipes, please click the button below. We would be happy to assist you!
Duplex 2205 stainless steel pipe for sale
GNEE supplies duplex stainless steel 2205 (UNS S32205/S31803, EN 1.4462) round tubes with a complete range of product specifications that comply with international standards (ASTM A790/A928/A789, ASME SA790, EN 10216-5, JIS G3468/G3459, GB/T 21833).
We provide two variants: 2205 seamless tubes and 2205 welded tubes. Duplex 2205 seamless tubes are manufactured via hot rolling and cold rolling processes, with an outer diameter range of 4–219 mm and a wall thickness range of 0.5–20 mm. They are ideal for deep-sea oil and gas gathering pipelines, tube bundles of chemical hydrogenation reactors, and high-pressure pipelines in seawater desalination systems. 2205 welded round tubes are produced using ERW and TIG welding techniques, featuring an outer diameter range of 5.0–1219.2 mm and a wall thickness range of 0.5–20 mm, and are suitable for large-diameter structural tubes (≤ DN3000) on offshore platforms as well as medium-and-low pressure medium transmission pipelines in chemical engineering.
Electropolished Stainless Grade 2205 Pipe
All products undergo solution annealing treatment at a temperature of 1020–1100°C, and are available with a variety of surface finishes, including pickling, 2B, BA, No.4, 6K/8K mirror finish, hairline finish, and custom surface treatments.
2205 stainless steel tubing specification
| Item | Stainless Steel Seamless Tube/Pipe | |
| Standard | ASTM A790 | |
| Material | Duplex and Super Duplex Steel: S31803, S32205, S2520, S32750, S32760 | |
| Surface | Polishing,annealing,pickling,bright | |
| Shape | Round Pipe/Tube | |
| Type | Cold rolled | |
| size | Length | 6m or Customized |
| Outer diameter | OD: 12.7mm~630mm WT: 1mm~50mm | |
| Delivery time | Prompt delivery or as the order quantity. | |
| Package | Standard export seaworthy package,or as required | |
Chemical Compatibility chart of Duplex Stainless Steel Pipe and Tube
| C | N | P | Si | Mn | Mo | Fe | Cr | S | Ni |
| 1.0 | 0.03 | 0.02 | 2.0 | 3.0 - 3.5 | 22.0 - 23.0 | 0.03 | 4.5 - 6.5 | 0.14 - 0.2 | Bal |
Mechanical Behaviour of Duplex 2205 Pipe and Tube
| Pipe Density | Pipe Melting Point | Yield Strength (0.2%Offset) | 2205 Duplex SS Pipe Tensile Strength | Elongation |
| 7.8 g/cm3 | 1350 °C (2460 °F) | Psi - 80000 , MPa - 550 | Psi - 116000 , MPa - 800 | 15 % |
Astm A790 Duplex 2205 Seamless Tube Weight chart
| Avarage Wall inches | Outside Diameter inches | Internal Area (in2) | Inside Diameter inches | D/t Ratio | Tube Cross Sectional Area (in2) |
|---|---|---|---|---|---|
| 0.0020 | 0.0250 | 0.00346 | 0.0210 | 12.050 | 0.00145 |
| 0.0028 | 0.0250 | 0.00296 | 0.0194 | 8.093 | 0.00195 |
| 0.0035 | 0.0250 | 0.00254 | 0.0180 | 7.014 | 0.00236 |
| 0.0049 | 0.0250 | 0.00181 | 0.0152 | 5.010 | 0.00309 |
| 0.0065 | 0.0250 | 0.00113 | 0.0120 | 3.085 | 0.00378 |
| 0.0020 | 0.0375 | 0.00881 | 0.0335 | 18.075 | 0.00223 |
| 0.0028 | 0.0375 | 0.00799 | 0.0319 | 13.039 | 0.00305 |
| 0.0035 | 0.0375 | 0.00731 | 0.0305 | 10.071 | 0.00374 |
| 0.0049 | 0.0375 | 0.00603 | 0.0277 | 7.065 | 0.00502 |
ASTM A790 Gr UNS S32205 Pipe Tolerance Chart
| O0.0D0.0 +/- INCHES | WALL THICKNESS INCHES | O0.0D0.0 INCHES |
|---|---|---|
| 0.0025 | Over 0.0165 - 0.0220 | 3-1/2" - 5" incl0.0 |
| 0.0020 | 0.0083 - 0.0165 | |
| 0.0010 | Over 0.0065 - 0.0134 | 1 - 1-1/2" incl0.0 |
| 0.0008 | 0.0025 - 0.0065 | |
| 0.0010 | Over 0.0065 - 0.0134 | 1/2" - 1" incl0.0 |
| 0.0005 | 0.0025 - 0.0065 | |
| 0.0013 | Over 0.0065 - 0.0109 | 2" - 2-1/2" incl0.0 |
| 0.0012 | 0.0032 - 0.0065 | |
| 0.0014 | Over 0.0109 - 0.0165 |
Alloy 2205 SCH 80 Tube Applications
Oil & Gas Industry: Offshore and onshore sectors, covering pipelines, production tubing, and subsea equipment.
Chemical Production: Used in chemical and petrochemical plants for transporting corrosive chemicals, acids, and solvents.
Marine Applications: Shipbuilding and marine engineering structures (e.g., piping systems, heat exchangers, and desalination equipment).Exhaust gas/wastewater purification systems: Used to treat corrosive exhaust gases and contaminated wastewater from industrial stacks.
Chemical Production
Marine Applications
gas/wastewater purification systems
Our Export Case Studies
Middle East Offshore Platform Project: Factory Acceptance Testing (FAT) for ASTM A790 UNS S31803 Duplex Stainless Steel Pipes
Product Description: ASTM A790 UNS S31803 (Duplex 2205)
Seamless Stainless Steel Pipes
Specifications: OD 60.3mm - 219.1mm; WT 3.91mm - 12.7mm
Destination: United Arab Emirates (UAE)
We are currently conducting rigorous pre-shipment inspections on a batch of ASTM A790 UNS S31803 duplex stainless steel pipes bound for export. Our technical team is strictly executing PMI material verification, metallographic structure analysis, and ultrasonic testing (UT). This precise testing guarantees the long-term safety and reliability of our products under extreme operating conditions, underscoring our uncompromising commitment to global engineering quality.
Quality Control
Mandatory Factory Inspection and Testing for ASTM A790 UNS S31803 Stainless Steel Pipes:
Chemical Composition Analysis
Testing Method: Positive Material Identification (PMI) testing or laboratory wet analysis.
Mechanical Properties Test
Corrosion Resistance Test
Hydrostatic Test
Eddy Current Test (ET)
Ultrasonic Test (UT)
2205 stianless steel pipe PMI
Ultrasonic Test
Obtain our comprehensive quality inspection report, covering chemical composition analysis, mechanical property testing, hydrostatic testing, and PMI (Positive Material Identification).
S2205 Stainless Steel Pipe Mill Test Certificate
Upon completion of all testing, the factory will issue a Mill Test Certificate compliant with the EN 10204 3.1 standard (or EN 10204 3.2, involving third-party inspection, if required by the customer).
Click to get the material list
High-quality sea freight packaging
Outer Load-Bearing Crate: Customized export-standard fumigation-free plywood / solid wood long wooden crates are used, perfectly tailored for long-length seamless steel pipes and fully compliant with international customs quarantine standards; featuring high structural rigidity, the crates prevent crushing and impacts during long-distance ocean freight and multi-leg transshipment, completely eliminating pipe bending, scratches, and dents.
Inner Waterproof Isolation: The entire interior of the crate is fully wrapped with a large PE waterproof film to completely block seawater, salt spray, and moisture, preventing water stains and rust spots on the stainless steel surface.
Internal Cushioning Protection: Moisture-proof Kraft paper / EPE (Expanded Polyethylene) foam.
Strapping & Securing: The pipes inside the crate are bundled and secured with woven straps to prevent sliding, shifting, and collisions during transit.
GNEE Customer Visit
GNEE supplies UNS S32205 stainless steel pipes to more than 60 countries and regions, including the United States, Mexico, Kuwait, Colombia, Turkey, Italy, Brazil, France, and Vietnam.
FAQ
Q: What are the common standards for 2205 round pipes?
A:ASTM A790: Standard for seamless and welded duplex stainless steel pipes.
ASTM A789: Standard for seamless and welded duplex stainless steel tubing for general service.
EN 10216-5: European standard for seamless stainless steel tubes for pressure purposes.
Q2: What is the differences between 316L and 2205?
The yield strength of 2205 is approximately twice that of 316L; this allows for reduced wall thickness in design, thereby lowering overall weight and cost. The PREN (Pitting Resistance Equivalent Number) of 2205 is typically between 32 and 35, whereas that of 316L is only around 24.
Q: Are 2205 duplex stainless steel round pipes magnetic?
A: Yes, they are magnetic. Because 2205 contains a microstructure comprising approximately 50% ferrite, it exhibits significant magnetism. This differs fundamentally from 304/316 austenitic stainless steels, which are non-magnetic (or only weakly magnetic).
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