Product Information
Duplex Stainless Steel Pipes
Our duplex stainless steel pipes feature a dual-phase metallographic structure combining ferrite and austenite, integrating the advantages of high strength from ferritic steel and excellent corrosion resistance from austenitic steel. These premium pipes exhibit superior resistance to seawater corrosion, pitting corrosion, crevice corrosion and stress corrosion cracking. They are widely applied in seawater environments, petrochemical industry, chemical fertilizer production, oil refining, oil and gas transportation, light industry, food processing, pulp and paper manufacturing, as well as energy and environmental protection industries, delivering high strength, outstanding durability and cost-effective performance for harsh medium-corrosion working conditions.
Main Material Grades
We offer a complete series of standard and customized duplex stainless steel grades to suit diverse corrosive industrial service scenarios:
UNS S32001, S31500, S32304, S32205, S32760, S32750
00Cr22Ni5Mo3N, 00Cr25Ni7Mo4N, 00Cr20Ni25Mo4.5Cu
Manufacturing Standards
All duplex stainless steel pipes are manufactured and rigorously tested in compliance with internationally recognized ASTM and ASME standards, ensuring stable mechanical properties, precise dimensional accuracy and reliable corrosion resistance for global industrial projects:
ASTM A789 / ASME SA789: Seamless and Welded Ferritic-Austenitic Stainless Steel Tubes for General Service
ASTM A790 / ASME SA790: Seamless and Welded Ferritic/Austenitic Stainless Steel Pipes
ASTM A928: Standard Specification for Electric-Fusion-Welded Ferritic/Austenitic (Duplex) Stainless Steel Pipes with Filler Metal
Product Size:
Outside Diameter: Φ6mm-Φ580mm
Wall Thickness:1.00mm-30.00mm
Length: 4000mm-15000mm
| OUTSIDE DIAMETER | WALL THICKNESS | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| NB(inch) | ASME(mm) | SCH10 | SCH30 | SCH40 | SCH60 | SCH80 | SCH100 | SCH120 | SCH140 | SCH160 |
| 1/2 | 21.3 | 2.11 | 2.41 | 2.77 | 3.73 | 4.78 | ||||
| 3/4 | 26.7 | 2.11 | 2.41 | 2.87 | 3.91 | 5.56 | ||||
| 1 | 33.4 | 2.77 | 2.9 | 3.38 | 4.55 | 6.35 | ||||
| 1.1/4 | 42.2 | 2.77 | 2.97 | 3.56 | 4.85 | 6.35 | ||||
| 1.1/2 | 48.3 | 2.77 | 3.18 | 3.68 | 5.08 | 7.14 | ||||
| 2 | 60.3 | 2.77 | 3.18 | 3.91 | 5.54 | 8.74 | ||||
| 2.1/2 | 73 | 3.05 | 4.78 | 5.16 | 7.01 | 9.53 | ||||
| 3 | 88.9 | 3.05 | 4.78 | 5.49 | 7.62 | 11.13 | ||||
| 3.1/2 | 101.6 | 3.05 | 4.78 | 5.74 | 8.08 | |||||
| 4 | 114.3 | 3.05 | 4.78 | 6.02 | 8.56 | 11.13 | 13.49 | |||
| 5 | 141.3 | 3.4 | 6.55 | 9.53 | 12.7 | 15.88 | ||||
| 6 | 168.3 | 3.4 | 7.11 | 10.97 | 14.27 | 18.26 | ||||
| 8 | 219.1 | 3.76 | 7.04 | 8.18 | 10.31 | 12.7 | 15.09 | 18.26 | 20.62 | 23.01 |
| 10 | 273 | 4.19 | 7.8 | 9.27 | 12.7 | 15.09 | 18.26 | 21.44 | 25.4 | 28.58 |
| 12 | 323.8 | 4.57 | 8.38 | 10.31 | 14.27 | 17.48 | 21.44 | 25.4 | 28.58 | 33.32 |
| 14 | 355.6 | 6.35 | 9.53 | 11.13 | 15.09 | 19.05 | 23.83 | 27.79 | 31.75 | 35.71 |
| 16 | 406.4 | 6.35 | 9.53 | 12.7 | 16.66 | 21.44 | 26.19 | 30.96 | 36.53 | 40.19 |
| 18 | 457.2 | 6.35 | 11.13 | 14.27 | 19.05 | 23.83 | 39.36 | 34.93 | 39.67 | 45.24 |
| 20 | 508 | 6.35 | 12.7 | 15.09 | 20.62 | 26.19 | 32.54 | 38.1 | 44.45 | 50.01 |
| 22 | 558.8 | 6.35 | 12.7 | 22.23 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | |
| 24 | 609.6 | 6.35 | 14.27 | 17.48 | 24.61 | 30.96 | 38.89 | 46.02 | 52.37 | 59.54 |
| 26 | 660.4 | 7.92 | ||||||||
| 28 | 711.2 | 7.92 | 15.88 | |||||||
| 30 | 762 | 7.92 | 15.88 | |||||||
Testing Facilities:
• Tensile testing machine
• Hardness testing machine
• Impact testing machine
• Metallurgical microscope with imageanalyser
• Germany Spike desktop full spectrum and portable spectrometer
Packing & Shipping
PACKING | 1. Marking: Size, standard,heat number as customer required |
2. Surface: No 1. Hair Line, Bright | |
3. Inner Packing: steel strong trips on every bundle | |
4. Outer Packing: PE strip wrapping outside | |
5. We also can do as customers' requirements | |
SHIPPING | 1. Shipping by containers |
2. Shipping by bulk ship |
