Duplex Stainless Steel Pipe

Duplex Stainless Steel Pipe

Duplex stainless steel pipes are composed of austenite and ferrite and have excellent corrosion resistance, high strength, mechanical properties, and resistance to stress corrosion cracking. Among them, the excellent corrosion resistance is superior to austenitic and ferritic stainless steel pipes in harsh environments such as seawater, chloride-rich environments and acidic solutions. It is highly resistant to pitting, crevice corrosion and stress corrosion cracking, making it ideal for offshore, marine and chemical processing applications.

  • SUS
  • ASTM
  • SAE
  • UNS
  • AISI
  • JIS
  • BSEN
  • DIN

Production Process:

  • Alloying & Smelting
  • Casting
  • Quality Control & Testing
  • Extrusion
  • Polishing
  • Pickling
  • Passivation

Production Technology:

  • Melting
  • Casting
  • Hot rolled
  • Cold Rolled
  • Heat Treatment
  • Cutting
  • Machining
  • Surface Treatment

Available, welcome to consult

A) Packaging Details: Standard export seaworthy packing or as required.
B) Delivery Time: 30-50 days, 7 days for stock goods.
C) Loading Port: Shanghai, Tianjin, Qingdao.
D) Offer Ability: 5000MT/Per Month.
E) MOQ: 1 Pcs.

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Gnee Duplex Stainless Steel Pipe Supplier & Manufacturer Supply Rich Grade/Size

Gnee is a leading ISO certified Duplex Steel Pipe supplier, manufacturer, exporter, manufacturer, wholesaler, distributor in China. We provide Duplex Stainless Steel Pipe in various grades and sizes according to customers’ specifications and requirements. We have a large inventory of high quality Duplex Pipes at the right prices, contact us today for a free quote!

Duplex Stainless Steel Pipe Common Grades
  • 2205 (UNS S31803/S32205, EN 1.4462)
  • 2507 (UNS S32750, EN 1.4410)
  • 2101 (UNS S32101, EN 1.4162)
  • 4501 (UNS S32760, EN 1.4501)
  • 2207 (UNS S32707, EN 1.4655)
  • 2707 HD (UNS S32707, EN 1.4367)
  • 904L (UNS N08904, EN 1.4539)
  • 255 (UNS S32550, EN 1.4507)
  • 316L (UNS S31603, EN 1.4404)
Duplex Stainless Steel tube Specification
Product NameDuplex Stainless Steel Tube
Duplex Stainless Steel Pipe
TypesDuplex Stainless Steel Welded Pipe
Duplex Stainless Steel Seamless Pipe
Surface TreatmentAnnealed/Pickling/Polished/Brushed/Bright/Sand-blasted Finished
Surface FinishedNO.1, NO.2D, NO.2B, BA, HL, 8K, Mirror, or as required
Material200 series 300 series 400 series
Size and DimensionsDuplex Stainless Steel Weld Pipe
Outside Diameter OD: 6 – 304.8 mm
Wall Thickness Range: 0.8 – 12.7 mm
Length: Single, Double Random & Cut Length
Customize: Available

Duplex Stainless Steel Seamless Pipe
Outside Diameter OD: 3.00 – 219.10 mm
Wall Thickness Range: 0.40 – 12.70 mm
Length: Single, Double Random & Cut Length
Customize: Available
FormsRound, Square, Rectangle
TechnologyHot Rolled, Cold Rolled
Value Added ServicesCutting, Beveling, Threading, Polishing (Electro & Commercial), Draw & Expansion as per required Size & Length, Non Destructive Ultrasonic, Testing Annealed & Pickled Bending
Ends1) Plain
2) Beveled
3) Thread with Coupling or cap
Processing ServiceCutting, bending, stamping, welding
Packaging Stainless Steel Metal PlateExport sea-worthy package
CertificationSGS ISO MTC CE BV
Supply Ability50000KGS
Parameters Of Duplex SS Pipe
GradeTensile Strength (MPa)Yield Strength (MPa)Elongation (%)Hardness (Brinell)Impact Toughness (J @ -50°C)Duplex Phase Content (%)
2205620 – 880≥ 450≥ 25≤ 290≥ 5040 – 60
2507≥ 800≥ 550≥ 25≤ 310≥ 5040 – 60
2304620 – 820≥ 400≥ 25≤ 290≥ 50 @ 0°C35 – 45
2101650 – 850≥ 450≥ 25≤ 290≥ 50 @ -50°C30 – 70
4501≥ 750≥ 550≥ 25≤ 310≥ 50 @ -50°C40 – 60
2207≥ 800≥ 550≥ 25≤ 310≥ 50 @ -50°C40 – 60
2707≥ 800≥ 550≥ 25≤ 310≥ 50 @ -50°C40 – 60
904L≥ 490≥ 220≥ 35≤ 192
255≥ 770≥ 550≥ 15≤ 31045 – 60
316L485 – 620≥ 170≥ 40≤ 217
  • Oil and Gas Industry
  • Chemical and Petrochemical Industry
  • Desalination Plants
  • Power Generation
  • Structural Applications
  • Food and Beverage Industry
Why Choose Gnee Duplex Stainless Steel Pipe Company?

Gnee, as a Chinese stainless steel supplier with 15 years of history, exports to 60+ countries. We provide various shapes of stainless steel, including plates, coils, pipes, bars, and fittings. Gnee is committed to providing comprehensive stainless steel solutions, with excellent after-sales service, we support customization and ensure product quality.

In addition, our stainless steel has been successfully exported to more than 60 countries such as Singapore, Malaysia, The United Arab Emirates, Oman, Turkey, Nigeria, Egypt, Kuwait, Indonesia, Qatar, and Kenya. Many regular customers come to visit our company and factory and make multiple orders.

What‘s The Feature Of Duplex Steel Pipe?

Duplex Stainless Steel Pipe exhibits excellent corrosion resistance, particularly in aggressive environments such as seawater, chloride-rich solutions, and acidic conditions. It resists pitting, crevice corrosion, and stress corrosion cracking, making it suitable for offshore, marine, and chemical processing applications.

Duplex Stainless Steel Pipe offers high strength compared to austenitic stainless steel pipes. It has a higher yield strength, allowing for thinner wall thicknesses and weight reduction in structural applications. This strength enables it to withstand heavy loads and pressure.

Duplex Stainless Steel Pipe maintains good toughness and ductility, providing resistance to impact and vibration. This toughness makes it suitable for applications subjected to harsh conditions and cyclic loading.

Duplex Stainless Steel Pipe demonstrates excellent fatigue resistance, making it suitable for systems exposed to cyclic loading and high-pressure fluctuations. It can withstand repeated stress cycles without failure, ensuring long-term reliability

Duplex Stainless Steel Pipe is highly durable and can withstand harsh operating conditions. It offers long-term performance in demanding environments, reducing the need for frequent maintenance or replacement.

What Services Does Gnee Provide?

Gnee can provide the following measurement services for stainless steel:

Dimensional Measurement: Measure dimensional parameters such as length, width and thickness by measuring instruments to ensure that the stainless steel is qualified and meets the design requirements.
Surface Measurement: Measure parameters such as flatness, bumpiness and surface roughness of the stainless steel surface to help ensure that the quality and surface condition of the stainless steel meets the requirements.
Thickness Measurement: Use thickness gauges to accurately measure the thickness of the stainless steel to ensure it meets the design requirements.
Material Measurement: Use material analysis instruments to measure the chemical composition and mechanical properties of the stainless steel to ensure that the quality and properties of the stainless steel meet the requirements.
Bending And Deformation Measurements: Use tools such as bending gauges and displacement sensors to measure and monitor the degree of bending and deformation of stainless steel to ensure that it is within the allowable range.

Ask Measurement service

Gnee can customize the size and shape of your stainless steel for your specific project needs. Custom design of stainless steel is carried out by a team of professional engineers and designers. Based on the project requirements and constraints, they will use calculation and simulation tools combined with experience and technical knowledge to optimize the stainless steel design to meet the specific needs of your different projects

● Adjustment of the thickness, width and length of stainless steel based on load calculations and strength requirements for structural design.
● The shape of the stainless steel can be designed according to the demand characteristics.
● If the convenience of installation and maintenance is considered, we can also add openings and passages for easy access and operation in the design for areas that require frequent maintenance.

Ask Customized Services

Sourcing Gnee stainless steel can provide the following further processing services. We can customize to meet the specific needs of our customers for different projects.

Cutting Service: Stainless steel can be custom cut to obtain the desired shape and size according to the customer’s needs. For example, flame cutting, plasma cutting, laser cutting, etc., can cut stainless steel into desired plates, blocks, shaped pieces, etc.
Bending & Forming: Stainless steel is bent and formed by applying stress and appropriate processes to obtain the desired shape.
Welding Services: Stainless steel can be subjected to various types of welding services, including manual arc welding, gas-shielded welding, laser welding, etc.
Hole Turning And Machining: Stainless steel is turned and holes are machined through the use of machining equipment. These processes produce smooth surfaces, precise holes and threads to meet specific assembly requirements.
Surface Treatments: Surface treatments can be applied to improve the corrosion resistance and aesthetics of the stainless steel. This includes methods such as painting, hot dip galvanizing, and electroplating to add a protective layer and provide corrosion resistance.

Ask Deep Processing Services

Gnee stainless steel can provide testing and the following third-party inspection services. These third-party testing services provide independent and objective verification of stainless steel’s compliance with relevant standards and regulations.

Mechanical Property Testing: Used to determine whether the strength, toughness, ductility and other mechanical properties of stainless steel meet the specified requirements.
Chemical Composition Analysis: Quantitative determination of elements on stainless steel samples through spectral analysis, atomic absorption spectroscopy, inductive coupling and other technologies.
Corrosion Performance Test: Common corrosion performance test methods include salt spray corrosion test, acid-base corrosion test and electrochemical corrosion test.
Tensile Strength Test: Through the tensile test, the parameters such as yield strength, tensile strength and breaking strength of stainless steel during the tensile process are measured.
Non-Destructive Testing: Non-destructive testing is used to evaluate hidden defects, cracks and looseness in stainless steel materials. Common methods include ultrasonic testing, magnetic particle testing, eddy current testing, and radiographic testing.
Pressure Test: By exposing stainless steel products to a specific pressure, it is tested whether there are problems such as leakage or deformation to ensure that its pressure resistance meets the requirements.
Surface Quality Test: Used to evaluate the surface flatness, smoothness and oxide layer of stainless steel products.
Welding Performance Test: Check the appearance, mechanical properties and metallographic microstructure of the weld to ensure that the quality of the stainless steel welded joint meets the requirements.
Metallographic Inspection: Through metallographic inspection, the structure, grain size, non-metallic inclusions, etc. of stainless steel are checked to evaluate its quality and performance.

Ask Testing Services
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