Super Duplex Steel Pipes
Super duplex steel pipe is a high-performance alloy tube built on a 50/50 austenite–ferrite microstructure, most commonly produced in grades UNS S32750 (2507) and UNS S32760 (Zeron 100). With a minimum PREN (Pitting Resistance Equivalent Number) of 40+, superior resistance to chloride-induced pitting and stress corrosion cracking is the defining characteristic. Yield strength typically runs 2–3× higher than standard 304 or 316 grades. We supply super duplex pipe across offshore oil and gas, chemical processing, desalination, and marine applications, with pricing, specifications, and a weight chart covered in full below.
Super Duplex Steel Pipe Price
Super duplex steel pipe prices vary based on grade, size, wall schedule, and prevailing raw material rates. Below are the primary pricing dimensions to evaluate before placing an order.
Approximate Price Range
Super duplex stainless steel pipe price often ranges from ₹750 to ₹1,200 per kg for standard grades such as 2507 (UNS S32750) in Indian markets, depending on OD, wall thickness, and order quantity.
Factors Affecting Price
- Grade and alloy content: Higher molybdenum, chromium, and nitrogen concentrations increase base material cost.
- Wall thickness and schedule: Heavier schedules (80S, 160) use more material and command a higher price per unit length.
- Manufacturing method: Seamless pipes cost more than welded pipes due to the more intensive hot-extrusion process.
- Market fluctuations: Global nickel and molybdenum prices directly affect super duplex pipe pricing; monitor LME rates before bulk procurement.
Super Duplex Stainless Steel Pipe Grades
Super duplex grades are differentiated by alloy composition and PREN value. The 5 most widely specified grades are listed below.
- Super Duplex Steel Zeron 100 Pipes
- Super Duplex Steel S32760 Pipes
- Super Duplex Steel Ferralium 255 Pipes
- Super Duplex Steel 2507 Pipes
Types Of Super Duplex Steel Pipe
Super duplex pipe is manufactured in 2 primary forms, each suited to specific pressure ratings and application environments.
- Seamless Super Duplex Steel Pipe
- Welded Super Duplex Steel Pipe
Super Duplex Steel Pipe Specifications
Review the core specification parameters below before ordering. These values define compatibility with your system design and governing project standards.
Super Duplex Steel Pipe Size And Weight Chart
The super duplex pipe weight chart below covers NPS 1/2" to 12" in 40S and 80S schedules. Use it to estimate material weight for structural load calculations and freight cost estimates.
|
NPS (in) |
OD (mm) |
Schedule |
Wall (mm) |
Weight (kg/m) |
Notes |
|
1/2 |
21.3 |
40S |
2.8 |
≈1.4 |
Common for small-bore lines and instruments. |
|
1/2 |
21.3 |
80S |
3.9 |
≈1.9 |
Higher‑pressure / sour‑service line. |
|
3/4 |
26.7 |
40S |
2.9 |
≈1.9 |
Process instrumentation, control lines. |
|
3/4 |
26.7 |
80S |
3.9 |
≈2.5 |
High‑pressure / high‑integrity service. |
|
1 |
33.4 |
40S |
3.4 |
≈2.6 |
General super‑duplex process piping. |
|
1 |
33.4 |
80S |
4.5 |
≈3.4 |
Sour / subsea‑type service. |
|
2 |
60.3 |
40S |
3.9 |
≈5.7 |
Common main‑line size for chemical plants. |
|
2 |
60.3 |
80S |
5.5 |
≈7.8 |
High-pressure/offshore. |
|
3 |
88.9 |
40S |
5.5 |
≈11.5 |
Seawater intake/discharge lines. |
|
3 |
88.9 |
80S |
7.6 |
≈15.5 |
Subsea / high‑pressure risers. |
|
4 |
114.3 |
40S |
6.0 |
≈17.5 |
Offshore/onshore process trunk lines. |
|
4 |
114.3 |
80S |
8.6 |
≈24.0 |
Sour‑service / high‑pressure. |
|
6 |
168.3 |
40S |
7.1 |
≈33.5 |
Common super‑duplex main pipeline. |
|
6 |
168.3 |
80S |
11.0 |
≈50.0 |
Subsea / high‑integrity offshore. |
|
8 |
219.1 |
40S |
8.2 |
≈52.0 |
Offshore trunk lines. |
|
8 |
219.1 |
80S |
12.7 |
≈78.0 |
High-pressure/subsea export lines. |
|
10 |
273.0 |
40S |
9.3 |
≈78.5 |
Large process/seawater lines. |
|
10 |
273.0 |
80S |
12.7 |
≈105.0 |
Sour / subsea‑type applications. |
|
12 |
323.9 |
40S |
9.5 |
≈98.0 |
Large‑diameter offshore lines. |
|
12 |
323.9 |
80S |
12.7 |
≈128.0 |
Subsea export lines and high‑pressure risers. |
Schedule Chart Of Super Duplex Steel Pipe
The schedule chart below shows wall thickness in millimetres across 4 schedule series (5S, 10S, 40S, 80S) for NPS 1/2" to 12". A higher schedule number means a thicker wall and a higher pressure rating.
|
NPS (in) |
OD (mm) |
5S wall (mm) |
10S wall (mm) |
40S wall (mm) |
80S wall (mm) |
|
1/2 |
21.3 |
1.7 |
2.1 |
2.8 |
3.9 |
|
3/4 |
26.7 |
1.7 |
2.1 |
2.9 |
3.9 |
|
1 |
33.4 |
1.7 |
2.8 |
3.4 |
4.5 |
|
1‑1/4 |
42.2 |
1.7 |
2.8 |
3.6 |
4.9 |
|
1‑1/2 |
48.3 |
1.7 |
2.9 |
3.7 |
5.1 |
|
2 |
60.3 |
1.7 |
2.8 |
3.9 |
5.5 |
|
3 |
88.9 |
2.1 |
3.0 |
5.5 |
7.6 |
|
4 |
114.3 |
2.1 |
3.0 |
6.0 |
8.6 |
|
6 |
168.3 |
2.8 |
3.4 |
7.1 |
11.0 |
|
8 |
219.1 |
2.8 |
3.8 |
8.2 |
12.7 |
|
10 |
273.0 |
3.4 |
4.2 |
9.3 |
12.7 |
|
12 |
323.9 |
4.0 |
4.6 |
9.5 |
12.7 |
Key Features Of Super Duplex Steel Pipe
Super duplex steel pipe is selected for demanding service conditions where standard austenitic or duplex grades fall short. The 9 standout features are listed below.
- High Strength
- Excellent Corrosion Resistance
- Enhanced Durability
- Good Toughness
- Cost Efficiency
- High Chromium and Molybdenum Content
- Good Weldability
- Resistance to Sulfide Stress Corrosion
- Low Thermal Expansion
Applications Of Super Duplex Steel Pipe
Super duplex pipe handles the harshest process environments across 9 major industries.
- Oil and Gas Industry
- Chemical Processing
- Marine Industry
- Power Generation
- Desalination Plants
- Pulp and Paper Industry
- Aerospace Industry
- Water Treatment
- Construction
How To Choose The Right Super Duplex Steel Pipe Manufacturer And Supplier?
Selecting the right super duplex pipe suppliers and manufacturers directly affects pipe integrity, project timelines, and total procurement cost. Evaluate the 4 areas below before finalising a vendor.
Selecting The Right Supplier
Start by confirming that the manufacturer produces pipe in the exact grade and NPS your project requires. Not every facility processes super duplex alloys to verify production capability for grades like S32750 and S32760 specifically.
Technical Considerations
- Grade suitability: Match the UNS grade to the service environment — chloride-rich, sour, or high-pressure. Request the material test certificate (MTC) confirming chemical composition, PREN, and mechanical properties.
- Standard compliance: Confirm pipes are produced to ASTM A790 / ASME SA790 for seamless and welded ferritic-austenitic pipe. Non-compliant pipes will fail pressure and corrosion tests.
- Size and schedule availability: Check that the required NPS and wall schedule are in stock. Custom schedules for super duplex steel pipe can carry 8–12 week lead times, and evaluating supplier credibility
- Certifications: A credible super duplex pipe manufacturer holds ISO 9001, PED, and NACE MR0175 certifications at a minimum.
- Mill traceability: Every pipe batch must carry a heat number traceable to the originating mill. This is mandatory for project documentation and quality audits.
- References and track record: Request a client list. References from oil and gas, subsea, and chemical projects carry the most weight for super duplex alloy procurement.
Procurement Strategy
- Request for quotation (RFQ): Send a clear RFQ specifying grade (UNS number), NPS, schedule, finish, governing standard, and quantity. Vague RFQs produce inaccurate quotes.
- Compare at least 3 quotes: Evaluate on price, lead time, MTC availability, and minimum order quantity (MOQ).
- Inspect before dispatch: For bulk orders, conduct a pre-dispatch inspection (PDI) or third-party inspection (TPI) at the manufacturer's facility. This is standard practice for high-integrity piping.
Super duplex steel pipe is a high-performance alloy tube built on a 50/50 austenite–ferrite microstructure, most commonly produced in grades UNS S32750 (2507) and UNS S32760 (Zeron 100). With a minimum PREN (Pitting Resistance Equivalent Number) of 40+, superior resistance to chloride-induced pitting and stress corrosion cracking is the defining characteristic. Yield strength typically runs 2–3× higher than standard 304 or 316 grades. We supply super duplex pipe across offshore oil and gas, chemical processing, desalination, and marine applications, with pricing, specifications, and a weight chart covered in full below.
Super Duplex Steel Pipe Price
Super duplex steel pipe prices vary based on grade, size, wall schedule, and prevailing raw material rates. Below are the primary pricing dimensions to evaluate before placing an order.
Approximate Price Range
Super duplex stainless steel pipe price often ranges from ₹750 to ₹1,200 per kg for standard grades such as 2507 (UNS S32750) in Indian markets, depending on OD, wall thickness, and order quantity.
Factors Affecting Price
- Grade and alloy content: Higher molybdenum, chromium, and nitrogen concentrations increase base material cost.
- Wall thickness and schedule: Heavier schedules (80S, 160) use more material and command a higher price per unit length.
- Manufacturing method: Seamless pipes cost more than welded pipes due to the more intensive hot-extrusion process.
- Market fluctuations: Global nickel and molybdenum prices directly affect super duplex pipe pricing; monitor LME rates before bulk procurement.
Super Duplex Stainless Steel Pipe Grades
Super duplex grades are differentiated by alloy composition and PREN value. The 5 most widely specified grades are listed below.
- Super Duplex Steel Zeron 100 Pipes
- Super Duplex Steel S32760 Pipes
- Super Duplex Steel Ferralium 255 Pipes
- Super Duplex Steel 2507 Pipes
Types Of Super Duplex Steel Pipe
Super duplex pipe is manufactured in 2 primary forms, each suited to specific pressure ratings and application environments.
- Seamless Super Duplex Steel Pipe
- Welded Super Duplex Steel Pipe
Super Duplex Steel Pipe Specifications
Review the core specification parameters below before ordering. These values define compatibility with your system design and governing project standards.
Super Duplex Steel Pipe Size And Weight Chart
The super duplex pipe weight chart below covers NPS 1/2" to 12" in 40S and 80S schedules. Use it to estimate material weight for structural load calculations and freight cost estimates.
|
NPS (in) |
OD (mm) |
Schedule |
Wall (mm) |
Weight (kg/m) |
Notes |
|
1/2 |
21.3 |
40S |
2.8 |
≈1.4 |
Common for small-bore lines and instruments. |
|
1/2 |
21.3 |
80S |
3.9 |
≈1.9 |
Higher‑pressure / sour‑service line. |
|
3/4 |
26.7 |
40S |
2.9 |
≈1.9 |
Process instrumentation, control lines. |
|
3/4 |
26.7 |
80S |
3.9 |
≈2.5 |
High‑pressure / high‑integrity service. |
|
1 |
33.4 |
40S |
3.4 |
≈2.6 |
General super‑duplex process piping. |
|
1 |
33.4 |
80S |
4.5 |
≈3.4 |
Sour / subsea‑type service. |
|
2 |
60.3 |
40S |
3.9 |
≈5.7 |
Common main‑line size for chemical plants. |
|
2 |
60.3 |
80S |
5.5 |
≈7.8 |
High-pressure/offshore. |
|
3 |
88.9 |
40S |
5.5 |
≈11.5 |
Seawater intake/discharge lines. |
|
3 |
88.9 |
80S |
7.6 |
≈15.5 |
Subsea / high‑pressure risers. |
|
4 |
114.3 |
40S |
6.0 |
≈17.5 |
Offshore/onshore process trunk lines. |
|
4 |
114.3 |
80S |
8.6 |
≈24.0 |
Sour‑service / high‑pressure. |
|
6 |
168.3 |
40S |
7.1 |
≈33.5 |
Common super‑duplex main pipeline. |
|
6 |
168.3 |
80S |
11.0 |
≈50.0 |
Subsea / high‑integrity offshore. |
|
8 |
219.1 |
40S |
8.2 |
≈52.0 |
Offshore trunk lines. |
|
8 |
219.1 |
80S |
12.7 |
≈78.0 |
High-pressure/subsea export lines. |
|
10 |
273.0 |
40S |
9.3 |
≈78.5 |
Large process/seawater lines. |
|
10 |
273.0 |
80S |
12.7 |
≈105.0 |
Sour / subsea‑type applications. |
|
12 |
323.9 |
40S |
9.5 |
≈98.0 |
Large‑diameter offshore lines. |
|
12 |
323.9 |
80S |
12.7 |
≈128.0 |
Subsea export lines and high‑pressure risers. |
Schedule Chart Of Super Duplex Steel Pipe
The schedule chart below shows wall thickness in millimetres across 4 schedule series (5S, 10S, 40S, 80S) for NPS 1/2" to 12". A higher schedule number means a thicker wall and a higher pressure rating.
|
NPS (in) |
OD (mm) |
5S wall (mm) |
10S wall (mm) |
40S wall (mm) |
80S wall (mm) |
|
1/2 |
21.3 |
1.7 |
2.1 |
2.8 |
3.9 |
|
3/4 |
26.7 |
1.7 |
2.1 |
2.9 |
3.9 |
|
1 |
33.4 |
1.7 |
2.8 |
3.4 |
4.5 |
|
1‑1/4 |
42.2 |
1.7 |
2.8 |
3.6 |
4.9 |
|
1‑1/2 |
48.3 |
1.7 |
2.9 |
3.7 |
5.1 |
|
2 |
60.3 |
1.7 |
2.8 |
3.9 |
5.5 |
|
3 |
88.9 |
2.1 |
3.0 |
5.5 |
7.6 |
|
4 |
114.3 |
2.1 |
3.0 |
6.0 |
8.6 |
|
6 |
168.3 |
2.8 |
3.4 |
7.1 |
11.0 |
|
8 |
219.1 |
2.8 |
3.8 |
8.2 |
12.7 |
|
10 |
273.0 |
3.4 |
4.2 |
9.3 |
12.7 |
|
12 |
323.9 |
4.0 |
4.6 |
9.5 |
12.7 |
Key Features Of Super Duplex Steel Pipe
Super duplex steel pipe is selected for demanding service conditions where standard austenitic or duplex grades fall short. The 9 standout features are listed below.
- High Strength
- Excellent Corrosion Resistance
- Enhanced Durability
- Good Toughness
- Cost Efficiency
- High Chromium and Molybdenum Content
- Good Weldability
- Resistance to Sulfide Stress Corrosion
- Low Thermal Expansion
Applications Of Super Duplex Steel Pipe
Super duplex pipe handles the harshest process environments across 9 major industries.
- Oil and Gas Industry
- Chemical Processing
- Marine Industry
- Power Generation
- Desalination Plants
- Pulp and Paper Industry
- Aerospace Industry
- Water Treatment
- Construction
How To Choose The Right Super Duplex Steel Pipe Manufacturer And Supplier?
Selecting the right super duplex pipe suppliers and manufacturers directly affects pipe integrity, project timelines, and total procurement cost. Evaluate the 4 areas below before finalising a vendor.
Selecting The Right Supplier
Start by confirming that the manufacturer produces pipe in the exact grade and NPS your project requires. Not every facility processes super duplex alloys to verify production capability for grades like S32750 and S32760 specifically.
Technical Considerations
- Grade suitability: Match the UNS grade to the service environment — chloride-rich, sour, or high-pressure. Request the material test certificate (MTC) confirming chemical composition, PREN, and mechanical properties.
- Standard compliance: Confirm pipes are produced to ASTM A790 / ASME SA790 for seamless and welded ferritic-austenitic pipe. Non-compliant pipes will fail pressure and corrosion tests.
- Size and schedule availability: Check that the required NPS and wall schedule are in stock. Custom schedules for super duplex steel pipe can carry 8–12 week lead times, and evaluating supplier credibility
- Certifications: A credible super duplex pipe manufacturer holds ISO 9001, PED, and NACE MR0175 certifications at a minimum.
- Mill traceability: Every pipe batch must carry a heat number traceable to the originating mill. This is mandatory for project documentation and quality audits.
- References and track record: Request a client list. References from oil and gas, subsea, and chemical projects carry the most weight for super duplex alloy procurement.
Procurement Strategy
- Request for quotation (RFQ): Send a clear RFQ specifying grade (UNS number), NPS, schedule, finish, governing standard, and quantity. Vague RFQs produce inaccurate quotes.
- Compare at least 3 quotes: Evaluate on price, lead time, MTC availability, and minimum order quantity (MOQ).
- Inspect before dispatch: For bulk orders, conduct a pre-dispatch inspection (PDI) or third-party inspection (TPI) at the manufacturer's facility. This is standard practice for high-integrity piping.
Super Duplex Steel Pipes Suppliers
Super Duplex Steel Pipes FAQ's
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