Duplex Steel Pipes & Tubes
ASTM A 789 / A 790 Duplex Steel Pipes & Tubes Manufacturer, Exporter & Suppliers, Duplex Steel Seamless Pipes & Tubes, Duplex Steel Welded Pipes & Tubes, ERW Pipes Suppliers in India.
Kalpataru Piping Solutions is a leading manufacturer and supplier of premium duplex steel pipes and duplex steel tubes in various grades like Duplex S32205 and Duplex 31803. Known for their exceptional strength and corrosion resistance, duplex steel seamless pipes combine the microstructures of austenite and ferrite, offering improved durability compared to standard stainless steel grades. The higher molybdenum and chromium content in duplex steel welded pipes enhances their resistance to corrosion, especially in chloride-rich environments. These pipes are cost-effective, offering comparable strength and corrosion resistance to higher alloyed grades, making them an excellent choice for demanding applications.
Duplex stainless steel tubes are renowned for their outstanding mechanical properties. The combination of high molybdenum, chromium, and nitrogen content provides superior resistance to pitting and crevice corrosion. With greater strength, lighter gauges of duplex steel seamless tubes can be used to achieve the same durability as thicker nickel-based alloys. The unique duplex structure ensures welded duplex steel tubes are highly resistant to chloride stress corrosion cracking, making them suitable for use in aggressive environments. However, these tubes are best used in applications with temperatures below 600°F (316°C) to maintain optimal performance.
Duplex steel products, including duplex steel round pipes and rectangular pipes, offer excellent resistance to uniform corrosion from organic acids like acetic and formic acid. Additionally, they are highly resistant to chloride-containing inorganic acids. Their advanced properties make them ideal for use in industries requiring high performance and durability. Whether its duplex pipe suppliers or end-users, these materials deliver reliability and long-term efficiency for various applications.
Duplex Stainless Steel Pipe Grades
Grade 2205: The most widely used duplex stainless steel pipe grade, 2205 offers exceptional corrosion resistance and high strength. It is ideal for applications in demanding environments where durability and resistance to pitting and cracking are essential.
Grade 2507 : Often referred to as super duplex, this grade is known for its superior strength and outstanding resistance to corrosion. It is well-suited for use in harsh and aggressive conditions, including marine and chemical processing industries.
Grade 2304 : A cost-effective lean duplex grade, 2304 provides reliable corrosion resistance and strength, making it a great option for less demanding applications while maintaining excellent performance.
Duplex Pipe Specification
| Specifications |
ASTM A928 / ASME SA 928 |
| Pipe Thickness | 0.3mm – 50 mm |
| Pipe Standard | EN, ASTM, ASME AISI, GB, JIS, DIN Duplex 2205 Pipe Supplier |
| Duplex 2205 Seamless Pipe Outer Diameter | Sizes up to 12” NB/ 6.00 – 250 mm OD |
| Duplex 2205 Welded Pipe size | 5.0 to 1219.2 mm |
| Duplex 2205 Welded Tube Size | 6.35 – 152 mm OD |
| Duplex 2205 EFW Pipe size | 5.0 – 1219.2 mm |
| Duplex 2205 tubing wall thickness | 0.0020″ to 0.0220″ (custom wall thicknesses available) |
| Duplex 2205 Seamless Tube Size | 15 NB – 150 NB IN/ 3.35 To 101.6 mm OD, |
| Duplex 2205 Pipe & Tube Finish | AP (Annealed & Pickled), Polished, MF, BA (Bright & Annealed), NO.4, NO.1, BA, 2B, 8K, HL, Mirror finish,etc |
| Pipe & Tube Swg & Bwg | 12 Swg., 10 Swg., 16 Swg., 14 Swg., 20 Swg, 18 Swg. |
| Duplex 2205 Pipe Schedule | SCH10, SCH 5, SCH 80, SCH 40, , SCH 160, SCH 80S, SCH XS, SCH XXS |
| Duplex 2205 Pipe & Tube Form | Hydraulic, Round, Rectangular, Hollow, Pan Cake Coils, Square, Coiled, “U” Shape, Straight Pipes etc. |
| Duplex 2205 Pipe & Tube Length | Standard & Cut length, Single and Double Random, |
| Duplex 2205 Pipe & Tube Type | Duplex 2205 ERW/ Seamless / Welded / EFW / CDW /Fabricated / CEW/ DOM Pipe |
| Pipe Value Added Service | as per required Size & Length Draw & Expansion , Pickled Bending and Polish (Electro & Commercial) Annealed, Machining Etc. |
| Duplex 2205 Tube Application | Oil Tube, Boiler and Heatexchanger, Gas Tube, Fluid Tube |
| Duplex 2205 Pipe & Tube End | Beveled End, Plain End, Treaded Pipe. |
| Pipe Marking | marked as follows All Duplex 2205 Pipes : Standard, Grade, Thickness, OD, Heat No. (Or according to the customer’s request.), Length |
| Material Test Certificates (MTC) |
100% Radiography Test Report, Raw Materials Certificate |
| Specialized in | Duplex 2205 Heat Exchanger & Condenser Tubes Duplex 2205 Capillary Tube & Other Odd Size Large Diameter Duplex 2205 Pipe |
Types of Duplex Steel Pipes and Tubes
Duplex Steel UNS S31803 Pipes & Tubes
Duplex Steel UNS S32205 Pipes and Tubes
Duplex steel Pipe & Tube Chemical Composition
| Grade | C≤ | Mn≤ | P≤ | S≤ | Si≤ | Ni | Cr | Mo | N | Cu |
| S31803 | 0.03 | 2.00 | 0.03 | 0.02 | 1.00 | 4.5–6.5 | 21.0–23.0 | 2.5–3.5 | 0.08–0.20 | – |
| S32205 | 0.03 | 2.00 | 0.03 | 0.02 | 1.00 | 4.5–6.5 | 22.0–23.0 | 3.0–3.5 | 0.14–0.20 | – |
| S32750 | 0.03 | 1.20 | 0.035 | 0.02 | 0.80 | 6.0-8.0 | 24.0-26.0 | 3.0-5.0 | 0.24-0.32 | 0.5 |
| S32760 | 0.05 | 1.00 | 0.03 | 0.01 | 1.00 | 6.0-8.0 | 24.0-26.0 | 3.0-4.0 | 0.20-0.30 | 0.50–1.00 |
Duplex steel Pipe & Tube Mechanical Properties
| Mechanical properties | Tensile,min,ksi[MPa] | Yield,min,ksi[MPa] | Elongation,%(min) | Hardness,HB(max) |
| S31803 | 90 [620] | 65 [450] | 25 | 290 |
| S32205 | 95 [655] | 65 [450] | 25 | 290 |
| S32750 | 116 [800] | 80 [550] | 15 | 300 |
| S32760 | 109 [750] | 80 [550] | 25 | 300 |
Applications of Duplex Steel Pipes
- Chemical Processing and Storage: Used in facilities handling chemicals due to their corrosion resistance and strength.
- Oil and Gas Industry: Essential for production, transportation, and refining processes, including offshore rigs and exploration projects.
- Marine Environments: Ideal for use in harsh sea conditions where resistance to chloride-induced corrosion is critical.
- Pollution Control: Incorporated into equipment designed for environmental protection, such as scrubbers and exhaust systems.
- Pulp and Paper Industry: Utilized in manufacturing processes due to their durability in corrosive conditions.
- Structural and Mechanical Components: Perfect for applications requiring high strength and toughness.
- Heat Exchangers and Cooling Systems: Effective in thermal transfer and cooling applications due to their excellent thermal conductivity and resistance to scaling.
We Export To Duplex Steel Pipes & Tubes
New Zealand, Ukraine, Brazil, Azerbaijan, Angola, United Kingdom, Philippines, Oman, France, Algeria, Macau, Sri Lanka, Tibet, Norway, Mexico, Venezuela, Denmark, Russia, Bhutan, Estonia, Austria, Vietnam, Argentina, Turkey, Greece, Romania, Bahrain, Bangladesh, Afghanistan, Italy, Poland, Zimbabwe, Thailand, India, Kenya, Ecuador, Puerto Rico, Nepal, Malaysia, Bulgaria, Libya, Slovakia, Chile, Serbia, Australia, Poland, Iran, Costa Rica, Peru, South Korea, Iraq, Iran, Indonesia, Spain, Trinidad & Tobago,Tunisia, Qatar, Japan, Canada, Taiwan, Yemen, Mongolia, Czech Republic, Israel, Ghana, Egypt, Nigeria, Saudi Arabia, United Arab Emirates, Namibia, Hungary, South Africa, Hong Kong, Croatia, Colombia, Lebanon, Nigeria, Portugal, Finland, Pakistan, Jordan, Sweden, Belgium, Gambia, Lithuania, United States, Chile, Bolivia, Germany, Singapore, Ireland, Gabon, Kuwait, Switzerland, Mexico, Belarus, Kazakhstan, Morocco, China, Netherlands, Germany, Belgium, Italy, Turkey, Denmark and UK.
FAQs
What is a duplex pipe?
Duplex pipes, combining austenitic and ferritic stainless steel structures, offer superior strength, corrosion resistance, and a high strength-to-weight ratio, making them ideal for demanding industrial applications.
What is a duplex stainless steel tube?
Duplex stainless steel tubes feature a balanced microstructure of 50% austenite and 50% ferrite, offering combined benefits of strength, corrosion resistance, and durability from both steel types.
Is duplex steel expensive?
Duplex stainless steel is more expensive than standard ferritic or austenitic steels due to its complex production process and superior properties, including strength and corrosion resistance.
Related Products
- Duplex Steel UNS S31803 Plates and Duplex Steel UNS S31803 Sheets
- Duplex Steel UNS S32205 Plates and Duplex Steel UNS S32205 Sheets
- Duplex Steel UNS S31803 Buttweld Fittings
- Duplex Steel UNS S32205 Buttweld Fittings
- Duplex Steel UNS S31803 Forged Fittings
- Duplex Steel UNS S32205 Forged Fittings
- Duplex Steel UNS S32205 Instrumentation Valve