Super Duplex Steel Pipes
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Super Duplex Steel Pipes are made from a mix of austenitic and ferritic stainless steel with chromium, nickel, and molybdenum for superior strength and corrosion resistance. Midland Alloys is a trusted super duplex steel pipe manufacturer in India, offering pipes that meet ASTM A789 and ASME SA789 standards. These pipes are used in the oil and gas industry, offshore platforms, chemical plants, heat exchangers, boilers, and pressure vessels. Our super duplex stainless steel pipe grades include UNS S32750 and UNS S32760, known for high performance in harsh environments. Using an advanced extrusion process, we offer pipes in round, hollow, square, rectangular, hydraulic and more. Available in custom forms, with varied sizes, lengths, and finishes to match project needs. Our super duplex stainless steel pipe price is based on size, finish, length and other specifications.
Key Benefits of Super Duplex Steel Pipes
- High tensile and yield strength handle extreme pressures with ease.
- Superior resistance to stress corrosion cracking in harsh conditions.
- Excellent weldability and formability reduce fabrication time and cost.
- Super Duplex stainless steel piping has better thermal conductivity which improves efficiency in systems.
- Longer service life lowers maintenance and replacement needs.
- Outstanding pitting and crevice corrosion resistance in seawater applications.
- Balanced structure offers durability with a lighter wall thickness.
Difference Between Duplex and Super Duplex Steel Pipe
Technical Specifications of Super Duplex Steel Pipes
Seamless Pipe OD : ½″ NB – 16″ NB
Welded Pipe OD : ½″ NB – 24″ NB
EFW Pipe Size : 6″ NB – 24″ NB
ASTM A789 ASME SA789
Seamless, ERW, Welded, Fabricated
Round, Square, Rectangular, Hydraulic Etc
Single Random, Double Random & Cut Length.
Plain End, Beveled End, Treaded
SCH5, SCH10, SCH20, SCH30, SCH40, STD, SCH80, SCH 80S, SCH60, SCH80, SCH120, SCH140, SCH160, SCH XXS, SCH XS
No. 2B – Mill finish / Matte finish, No. 4 – Brushed finish, No. 8 – Mirror finish, Bright Annealed – Smooth / Slightly reflective, Polished – Smooth / Enhanced corrosion resistance,Mirror – Highly reflective,
Types of Super Duplex Steel Pipes
Manufacturing Types
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Seamless PipeWeld-free, perfect for even strength and sizing precision.
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Welded PipeWelded from flat-rolled steel, widely used where economy and large sizes are required.
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ERW PipeElectric Resistance Welded (ERW) pipes provide neat, high quality weld seams and are ideal for medium-pressure applications.
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EFW PipeElectric Fusion Welded (EFW) pipes are welded by fusion welding, usually applied in larger diameters and high-demand processes.
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LSAWLongitudinal Submerged Arc Welded (LSAW) pipes provide straight seam welding which is favored for thick-wall pieces and structural requirements.
Pipe Forms
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Round PipeThe most common shape for fluid and gas transport.
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Square PipeUsed in architectural and structural applications requiring angular profiles.
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Rectangular PipeProvides greater strength in load-bearing regions and flat structures.
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Hydraulic PipeDesigned to provide precise dimensional control for fluid systems under pressure.
Contact us today to discuss how Super Duplex Steel Pipes can benefit your application. Whether you need guidance in selecting the right pipes or have specific requirements, our team of experts is here to help you find the optimal solution.
Duplex & Super Duplex Steel Pipes Grades We Offer
Super Duplex Steel Pipe Schedule
| Nominal | O.D. Inches | 10s | 10 | 40s & Std | 40 | 80s & E.H. | 80 | 160 |
| 1/8 | .405 | .049 | .049 | .068 | .068 | .095 | .095 | |
| 1/4 | .540 | .065 | .065 | .088 | .088 | .119 | .119 | |
| 3/8 | .675 | .065 | .065 | .091 | .091 | .126 | .126 | |
| 1/2 | .840 | .083 | .083 | .109 | .109 | .147 | .147 | .187 |
| 3/4 | 1.050 | .083 | .083 | .113 | .113 | .154 | .154 | .218 |
| 1 | 1.315 | .109 | .109 | .133 | .133 | .179 | .179 | .250 |
| 1 1/4 | 1.660 | .109 | .109 | .140 | .140 | .191 | .191 | .250 |
| 1 1/2 | 1.900 | .109 | .109 | .145 | .145 | .200 | .200 | .281 |
| 2 | 2.375 | .109 | .109 | .154 | .154 | .218 | .218 | .343 |
| 2 1/2 | 2.875 | .120 | .120 | .203 | .203 | .276 | .276 | .375 |
| 3 | 3.500 | .120 | .120 | .216 | .216 | .300 | .300 | .437 |
| 3 1/2 | 4.000 | .120 | .120 | .226 | .226 | .318 | .318 | |
| 4 | 4.500 | .120 | .120 | .237 | .237 | .337 | .337 | .531 |
| 4 1/2 | 5.000 | .247 | .355 | |||||
| 5 | 5.563 | .134 | .134 | .258 | .258 | .375 | .375 | .625 |
| 6 | 6.625 | .134 | .134 | .280 | .280 | .432 | .432 | .718 |
| 7 | 7.625 | .301 | .500 | |||||
| 8 | 8.625 | .148 | .148 | .322 | .322 | .500 | .500 | .906 |
| 9 | 9.625 | .342 | .500 | |||||
| 10 | 10.750 | .165 | .165 | .365 | .365 | .500 | .593 | 1.125 |
| 11 | 11.750 | .375 | .500 | |||||
| 12 | 12.750 | .180 | .180 | .375 | .406 | .500 | .687 | 1.312 |
| 14 | 14.000 | .188 | .250 | .375 | .437 | .500 | .750 | 1.406 |
| 16 | 16.000 | .188 | .250 | .375 | .500 | .500 | .843 | 1.593 |
| 18 | 18.000 | .188 | .250 | .375 | .562 | .500 | .937 | 1.781 |
Super Duplex Steel Pipe Weight Chart
| Pipe OD mm |
Pipe WT mm |
Nominal Size | Weight, kg/m |
|---|---|---|---|
| 21.34 | 2.11 | 1/2″ 10S | 1.02 |
| 21.34 | 2.77 | 1/2″ 40S | 1.29 |
| 26.67 | 2.11 | 3/4″ 10S | 1.30 |
| 26.67 | 2.87 | 3/4″ 40S | 1.71 |
| 33.40 | 1.65 | 1″ 5S | 1.31 |
| 33.40 | 2.77 | 1″ 10S | 2.13 |
| 33.40 | 3.38 | 1″ 40S | 2.54 |
| 42.16 | 1.65 | 1 1/4″ 5S | 1.67 |
| 42.16 | 2.77 | 1 1/4″ 10S | 2.73 |
| 42.16 | 3.56 | 1 1/4″ 40S | 3.44 |
| 48.26 | 1.65 | 1 1/2″ 5S | 1.92 |
| 48.26 | 2.77 | 1 1/2″ 10S | 3.16 |
| 48.26 | 3.68 | 1 1/2″ 40S | 5.49 |
| 60.33 | 1.65 | 2″ 5S | 2.42 |
| 60.33 | 2.77 | 2″ 10S | 3.99 |
| 60.33 | 3.91 | 2″ 40S | 5.52 |
| 73 | 3.05 | 2 1/2″ 10S | 5.35 |
| 73 | 5.16 | 2 1/2″ 40S | 8.77 |
| 88.90 | 2.11 | 3″ 5S | 4.58 |
| 88.90 | 3.05 | 3″ 10S | 6.56 |
| 88.90 | 5.49 | 3″ 40S | 11.47 |
| 101.60 | 3.05 | 3 1/2″ 10S | 7.53 |
| 114.30 | 2.11 | 4″ 5S | 5.93 |
| 114.30 | 3.05 | 4″ 10S | 8.50 |
| 114.30 | 6.02 | 4″ 40S | 16.32 |
| 141.3 | 3.4 | 5″ 10S | 11.74 |
| 141.3 | 6.55 | 5″ 40S | 22.10 |
| 168.3 | 2.77 | 6″ 5S | 11.48 |
| 168.3 | 3.4 | 6″ 10S | 14.04 |
| 168.3 | 7.11 | 6″ 40S | 28.69 |
| 219.1 | 2.77 | 8″ 5S | 15.00 |
| 219.1 | 3.76 | 8″ 10S | 20.27 |
| 219.1 | 8.18 | 8″ 40S | 43.20 |
| 273 | 3.40 | 10″ 5S | 22.95 |
| 273 | 4.19 | 10″ 10S | 28.20 |
| 273 | 9.27 | 10″ 40S | 61.22 |
| 323.9 | 3.96 | 12″ 5S | 31.72 |
| 323.9 | 4.57 | 12″ 10S | 36.54 |
| 323.9 | 9.53 | 12″ 40S | 75.02 |
| 355.6 | 4.78 | 14″ 10S | 41.99 |
| 355.6 | 9.53 | 14″ STD | 82.58 |
| 406.4 | 4.78 | 16″ 10S | 48.07 |
| 406.4 | 9.53 | 16″ STD | 94.71 |
| 457.2 | 4.78 | 18″ 10S | 54.15 |
| 508.0 | 5.54 | 20″ 10S | 69.70 |
| 610.0 | 6.35 | *24″ 10S | 95.92 |
How Super Duplex Steel Pipes Are Manufactured
Round Bar
Analytic
Cut to Length
Centering
Heating
Perforation
Inspection of Size
Pickling
Inspection of Surface
Lubricating
Cold Drawing (Cold Rolling)
Degreasing
Annealing
Straightening
Cut
Pickling / Passivating
Inspection
Analytic
Marking
Packing & Shipping
Applications of Super Duplex Steel Pipe
Why Choose Midland Alloys Inc. for Super Duplex Steel Pipes ?
Frequently Asked Questions About Super Duplex Steel Pipes
Yes, super duplex has higher strength and better corrosion resistance than 316 stainless steel.
A super duplex pipe is a high-strength pipe made of austenitic-ferritic stainless steel for harsh environments.
It is mainly available in grades UNS S32750 and UNS S32760.
The price varies by size, grade, and market rates due to its alloy content.
