Super duplex stainless steel pipes and pipe fittings are highly durable and resistant to corrosion, making them an ideal choice for use in harsh environments. At Om Steel, we offer a wide range of super duplex stainless steel pipes and pipe fittings that are designed to meet the unique needs of our clients.
Super duplex stainless steel pipes and pipe fittings are made up of a combination of austenitic and ferritic stainless steel, which provides them with exceptional strength and resistance to corrosion. These pipes have higher chromium, molybdenum, and nitrogen content than standard duplex stainless steel pipes, which provides them with superior corrosion resistance and higher strength.
At Om Steel, we offer various grades of super duplex stainless steel pipes and pipe fittings, including S32750, S32760, S32550, and others. These grades have different properties and are used in various applications based on their strength, corrosion resistance, and other factors. For instance, S32750 is a high-strength grade that is commonly used in oil and gas industry applications, while S32760 is a super duplex grade with excellent corrosion resistance that is often used in marine and chemical processing industries.
Super duplex stainless steel pipes and pipe fittings also offer excellent heat resistance, making them suitable for high-temperature applications. They are highly versatile and can be used in various industrial applications, including oil and gas, chemical processing, and desalination. Om Steel is a trusted manufacturer of high-quality super duplex stainless steel pipes and pipe fittings that offer exceptional features such as high strength, superior corrosion resistance, and heat resistance.
ASTM A Steel Pipe Specifications for Super Duplex Stainless Steel Pipes
ASTM A312 is the most commonly used specification. This standard covers seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steels intended for high-temperature and general corrosive service.
Austenitic stainless steels are known for their excellent corrosion resistance and high-temperature strength. They contain a minimum of 16% chromium and 6% nickel, along with other elements such as molybdenum and nitrogen. These alloys are non-magnetic in the annealed condition but can become slightly magnetic after cold working.
ASTM A312 Specification
The ASTM A312 specification covers a wide range of austenitic grades, including TP304/304L, TP316/316L, TP321/321H, TP347/347H, and many others. The “TP” prefix stands for “Type,” followed by a number that indicates the nominal composition of the alloy.
The standard also specifies various dimensions such as nominal pipe size (NPS), outside diameter (OD), wall thickness (WT), and length. For example, NPS 1/2 through NPS 24 has an OD equivalent to the nominal size in inches (i.e., NPS 1/2 has an OD of 0.84 inches). The WT is specified either in Schedule or Sch; for instance, Sch 10S has a wall thickness of 0.109 inches.
ASME B36.19M Standard
Another standard that complements ASTM A312 is ASME B36.19M, which covers the dimensions and tolerances of stainless steel pipes. This standard specifies various types of end finishes, such as plain ends, beveled ends, threaded ends, and grooved ends.
The standard also provides guidelines for marking and identification of pipes, including size, schedule, material grade, heat number, and manufacturer’s name or trademark.
A106 Gr.B vs. ASTM A312
Types of Super Duplex Fittings
Buttweld Fittings
Threaded Fittings
Socket Weld Fittings
Flanges
Flanges are used to connect pipes or valves together with bolts and nuts forming a tight seal between two surfaces when tightened against each other with gaskets between them.. Flanges can be classified into several types based on their design such as slip-on flange (SO), weld neck flange (WN), blind flange (BL), lap joint flange (LJ), socket weld flange (SW), and threaded flange.
Super Duplex Stainless Steel Pipes and Pipe Fittings
Specifications
| Standard Specification | ASME, ASTM, AISI, AMS, JIS, EN, SAE, DIN, NF, TOCT, DS, DTD, GB |
|---|---|
| Super Duplex Seamless Pipe Size | ‘OD: 4 to 219mm Wall Thickness: 0.5 to 20mm” |
| 2507 Duplex Stainless Steel Welded Pipe Size | OD: 5.0 – 1219.2 mm |
| Super Duplex EFW Pipe Size | OD: 5.0 – 1219.2 mm |
| Super Duplex Stainless Steel Pipe WT | SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| 25cr Super Duplex 2507 Pipe manufacturing techniques | Seamless / ERW / EFW/ Welded / Fabricated / CDW/ LSAW/ Seam-Welded / Redrawn |
| Origin of Duplex 2507 Stainless Steel pipe material | Indian, European, Korean, Japanese |
| 2507 Duplex SS Pipe End Types | *BE : Beveled end BBE : Bevel both ends BLE : Bevel large end BSE : Bevel small end TOE / POE = Treaded One End / Plain One End TOE / BOE = Treaded One End / Beveled One End POE / BOE = Plain One End / Beveled One End TBE = Treaded Both Ends PBE = Plain Both Ends” |
| Form | Round, Square, Rectangular |
| Super Duplex Alloy 2507 Pipe Length | Single Random, Double Random & Required Length End: Plain End, Beveled End, Treaded |
| 2507 Super Duplex Stainless Steel Pipe Delivery Condition | Annealed and Pickled, Hot Finished, Polished, Bright Annealed, Cold Drawn |
Super Duplex Stainless Steel Pipe fittings
Specification
| Standard Specification | Super Duplex Fittings |
|---|---|
| Coating Fitting Faces | Cold and Hot Dip Galvanized, Zinc Plated, Yellow Transparent, Oil Black Paint, Anti-rust Paint |
| Thickness | View Our Thickness: Schedule 5S, SCH10, SCH20, SCH10, SCH20, SCH30, SCHTD, SCH40, SCH60, XS, SCH80, SCH100, SCH120, SCH140, SCH160. |
| Rating Pressure | Pressure Rating Of: 3000 LBS, 6000 LBS, 9000 LBS |
| Check Sizes | (SMLS UPTO 24”) 1/2” TO 36” (Buttweld 8” TO 36”) |
| Standard | MSS-SP-43 Type B Fittings, ANSI B16.28 Fittings, JIS B2312 Fittings, JIS B2313 Fittings, ANSI B16.9 Fittings, MSS-SP-43 Type A Fittings, MSS-SP-43 Type B Fittings |
| Dimensions Class | 2000#, 3000#, 6000#, 9000# |
| Application | Chemical Industry Water Pipeline Industry Nuclear Power Plant Natural Gas Industry Fabrication Industry Oil And Gas Industry |
| Fitting Machining Equipment | Press machine, electric bevelling machine, Bending machine, Pushing Machine, Sand-blasting machine etc |
ASTM A815 UNS S32750 Fittings
Sizes
| Seamless | Welded | |
|---|---|---|
| Elbows | Upto 24″ | Upto 42″ |
| Tees | Upto 24″ | Upto 36″ |
| Reducers | Upto 24″ | Upto 48″ |
| End Caps | Upto 24″ | – |
| Return Bends | Upto 8″ | – |
| Cross | Upto 8″ | Upto 36″ |
| Swage Nipple | Upto 4″ | – |
| Special Fittings: Piggable Bends, 3D, 5D, 10D etc. Customized Bends, Miter Bends | As per customer drawings and datasheets | – |
| Thickness | Sch 5, Sch 5s, Sch 10, Sch 10s, Sch 20, Sch 30, Sch 40, Sch 40s, Sch STD, Sch 60, Sch 80s, Sch 100, Sch 120, Sch XS, Sch XXS, Sch 160, upto 50mm in case of welded fittings | – |
Super Duplex Stainless Steel Pipe and Pipe Fittings Material
Range
| Super Duplex Alloy 2507 Round Pipes | 25cr Super Duplex 2507 Fabricated Pipes |
| Super Duplex Grade 2507 Square Pipes | Super Duplex Saf 2507 Schedule 5S Pipes |
| Duplex Steel 2507 Schedule 40 Pipes | Welded 2507 Super Duplex Stainless Steel Cold Drawn Pipes |
| Seamless Super Duplex Grade 2507 Pipes | Duplex Steel 2507 Welded Pipes |
| Super Duplex Saf 2507 ERW Pipes | ASTM A790 UNS S32760 2507 EFW Pipes |
| Duplex 2507 Stainless Steel Custom Pipes | 2507 Duplex SS Beveled End Pipes |
| Super Duplex Saf 2507 Polished Pipes | Super Duplex Exhaust Pipes |
| ASTM A790 UNS S32760 2507 Capillary Pipes | Small diameter 2507 Duplex Stainless Steel Pipes |
| Super Duplex SS 2507 Clad Pipes | Super Duplex 2507 Annealed Pipes |
| Cold Drawn Super Duplex 2507 Pipes | ASTM A790 UNS S32750 Alloy 2507 Seam Welded Pipes |
| Super Duplex Stainless Steel Overlay Pipes | 25cr Super Duplex 2507 Bush Hex Pipes |
| Thick Wall Duplex 2507 Stainless Steel Pipes | Thin Wall 2507 Duplex SS Pipes |
| 2507 Super Duplex SS Rectangle Pipes | Cold Drawn ASTM A790 UNS S32750 Alloy 2507 Seamless Pipes |
25cr Super Duplex 2507
Pipe Modulus Temperature
| GERMAN VDTÜV | ASME BPVC | |
|---|---|---|
| 2507 | 250°C/ 482°F | 316°C/ 600°F |
| 2205 | 280°C/ 536°F | 316°C/ 600°F |
| 0.036″ | 0.109″ | 1″ |
| 0.04″ | 0.125″ | 1.125″ |
| 0.05″ | 0.16″ | 1.25″ |
| 0.063″ | 0.19″ | 1.5″ |
| 0.071″ | 0.25″ | 1.75″ |
| 0.08″ | 0.3125″ | 2″ |
| 0.09″ | 0.375″ | 2.5″ |
| 0.095″ | 0.5″ | 3″ |
| 0.1″ | 0.625″ | – |
Super Duplex Alloy 2507
Pipe Schedule and Wall Thickness
| NOMINAL | O.D. INCHES | 10S | 10 | 40S & STD | 40 | 80S & E.H. | 80 | 160 |
|---|---|---|---|---|---|---|---|---|
| 1/8 | 0.405 | 0.049 | 0.049 | 0.068 | 0.068 | 0.095 | 0.095 | – |
| 1/4 | 0.54 | 0.065 | 0.065 | 0.088 | 0.088 | 0.119 | 0.119 | – |
| 3/8 | 0.675 | 0.065 | 0.065 | 0.091 | 0.091 | 0.126 | 0.126 | – |
| 1/2 | 0.84 | 0.083 | 0.083 | 0.109 | 0.109 | 0.147 | 0.147 | 0.187 |
| 3/4 | 1.05 | 0.083 | 0.083 | 0.113 | 0.113 | 0.154 | 0.154 | 0.218 |
| 1 | 1.315 | 0.109 | 0.109 | 0.133 | 0.133 | 0.179 | 0.179 | 0.25 |
| 1 1/4 | 1.66 | 0.109 | 0.109 | 0.14 | 0.14 | 0.191 | 0.191 | 0.25 |
| 1 1/2 | 1.9 | 0.109 | 0.109 | 0.145 | 0.145 | 0.2 | 0.2 | 0.281 |
| 2 | 2.375 | 0.109 | 0.109 | 0.154 | 0.154 | 0.218 | 0.218 | 0.343 |
| 2 1/2 | 2.875 | 0.12 | 0.12 | 0.203 | 0.203 | 0.276 | 0.276 | 0.375 |
| 3 | 3.5 | 0.12 | 0.12 | 0.216 | 0.216 | 0.3 | 0.3 | 0.437 |
| 3 1/2 | 4 | 0.12 | 0.12 | 0.226 | 0.226 | 0.318 | 0.318 | – |
| 4 | 4.5 | 0.12 | 0.12 | 0.237 | 0.237 | 0.337 | 0.337 | 0.531 |
| 4 1/2 | 5 | – | – | 0.247 | – | 0.355 | – | – |
| 5 | 5.563 | 0.134 | 0.134 | 0.258 | 0.258 | 0.375 | 0.375 | 0.625 |
| 6 | 6.625 | 0.134 | 0.134 | 0.28 | 0.28 | 0.432 | 0.432 | 0.718 |
| 7 | 7.625 | – | – | 0.301 | – | 0.5 | – | – |
| 8 | 8.625 | 0.148 | 0.148 | 0.322 | 0.322 | 0.5 | 0.5 | 0.906 |
| 9 | 9.625 | – | – | 0.342 | – | 0.5 | – | – |
| 10 | 10.75 | 0.165 | 0.165 | 0.365 | 0.365 | 0.5 | 0.593 | 1.125 |
| 11 | 11.75 | – | – | 0.375 | – | 0.5 | – | – |
| 12 | 12.75 | 0.18 | 0.18 | 0.375 | 0.406 | 0.5 | 0.687 | 1.312 |
| 14 | 14 | 0.188 | 0.25 | 0.375 | 0.437 | 0.5 | 0.75 | 1.406 |
| 16 | 16 | 0.188 | 0.25 | 0.375 | 0.5 | 0.5 | 0.843 | 1.593 |
| 18 | 18 | 0.188 | 0.25 | 0.375 | 0.562 | 0.5 | 0.937 | 1.781 |
Application Industry
Serving Diverse Sectors with Precision & Performance
Om Steel supplies premium steel and alloy products to a wide range of industries, ensuring strength, durability, and performance in every application. From construction, oil & gas, and automotive to power plants, shipbuilding, and chemical processing — our materials meet the demands of critical operations. Trusted by industry leaders, we deliver solutions that stand up to the toughest challenges.
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Speciality Valves & Vacuum
Precision Components
Defence & Aerospace
Oil/Gas
Speciality Valves & Vacuum
Precision Components
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