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 ASTM A999 / ASME SA 999 astm a790 duplex 2205, SA 789 alloy 2205, a790 gr 2205 ASTM A790 / ASME SA 790 |
| 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 Material Test Certificates (MTC) as per EN 10204 3.1, EN 10204/3.1B and EN 10204 3.2 Manufacturer Test Certificate Form A for Generapzed System of Preferences (GSP) Fumigation Certificates Third Party Inspection Report Heat Treatment Charts Duplex 2205 Tubes HS Code Commercial Invoice Laboratory Test Certificate from Govt. Approved Lab. |
| Specialized in |
Duplex 2205 Heat Exchanger & Condenser Tubes
Large Diameter Duplex 2205 Pipe |
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 |
We Export To Duplex Steel Pipes & Tubes
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FAQ
What is a duplex steel pipe?
Duplex steel pipe is a stainless steel alloy featuring a balanced mixture of ferritic and austenitic phases. Known for its high strength, excellent corrosion resistance, and durability, it’s widely used in industries like oil and gas, chemical processing, and marine applications.
What is a duplex stainless steel tube?
Duplex stainless steel tube features a balanced blend of ferritic and austenitic phases, providing high strength and excellent corrosion resistance. Used in industries like oil and gas, chemical processing, and marine applications, it combines durability with cost-effectiveness for demanding environments.
What is the strength of duplex steel?
Duplex stainless steel provides high strength with a 0.2% proof strength of around 450 MPa (65 ksi) for standard grades and up to 550 MPa (80 ksi) for super duplex grades. This high strength makes it ideal for high-pressure and corrosive environments.
Related Products
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- Duplex Steel UNS S32205 Buttweld Fittings
- Duplex Steel UNS S31803 Forged Fittings
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