Super Duplex Stainless Steel Pipe and Pipe Fittings

Super Duplex Stainless Steel Pipe and Pipe Fittings

Duplex Stainless Steel Pipe and Pipe Fittings

Super Duplex Stainless Steel pipes and pipe fittings unmatched durability and corrosion resistance of super duplex stainless steel pipes and pipe fittings at Ashapura Steel. Our extensive range is designed to excel in harsh environments, making them the preferred choice for various applications.

Crafted from a unique combination of austenitic and ferritic stainless steel, our super duplex pipes and fittings exhibit exceptional strength and resistance to corrosion. With higher chromium, molybdenum, and nitrogen content compared to standard duplex stainless steel, they offer superior corrosion resistance and increased strength.

Ashapura Steel provides a variety of super duplex stainless steel grades, including S32750, S32760, S32550, catering to diverse applications in industries like oil and gas, chemical processing, marine, and more. Each grade is chosen based on specific requirements such as strength, corrosion resistance, and application suitability.

Beyond their exceptional corrosion resistance, our super duplex stainless steel pipes and fittings boast excellent heat resistance, making them ideal for high-temperature applications. Versatile and reliable, they find application across various industries, ensuring optimal performance in oil and gas, chemical processing, and desalination.

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

While ASTM A312 is the most common specification for super duplex stainless steel pipes, other standards can also apply depending on the specific application requirements. For instance, A106 Gr.B is a carbon steel pipe specification widely used in low-pressure applications such as water wells and gas lines. A106 Gr.B has different chemical composition requirements than austenitic stainless steels and lower corrosion resistance but can be more cost-effective in certain cases.
While ASTM A312 is the most common specification for super duplex stainless steel pipes, other standards can also apply depending on the specific application requirements. For instance, A106 Gr.B is a carbon steel pipe specification widely used in low-pressure applications such as water wells and gas lines. A106 Gr.B has different chemical composition requirements than austenitic stainless steels and lower corrosion resistance but can be more cost-effective in certain cases.

Types of Super Duplex Fittings

Buttweld Fittings

Buttweld fittings are one of the most common types of super duplex fittings used in pipelines. These fittings are welded directly onto the pipe using a butt welding process. Buttweld fittings come in various shapes such as elbows, tees, reducers, caps, and stub ends. They are available in different sizes ranging from 1/2 inch to 48 inches.

Threaded Fittings

Threaded fittings are another type of super duplex fitting that is widely used in industrial applications. These fittings have threads on their interior or exterior surface that allow them to be screwed onto pipes or other components without welding. Threaded fittings come in various shapes such as elbows, tees, couplings, unions, plugs, and bushings.

Socket Weld Fittings

Socket weld fittings are similar to buttweld fittings but have a socket at one end instead of being straight like buttwelds. The socket allows for easier insertion into pipes or other components before welding takes place. Socket weld fittings come in various shapes such as elbows, tees, couplings, unions and reducing inserts.

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 SpecificationASME, 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 SizeOD: 5.0 - 1219.2 mm
Super Duplex 2507 EFW Pipe SizeOD: 5.0 - 1219.2 mm
Super Duplex Stainless Steel Pipe WTSCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
25cr Super Duplex 2507 Pipe manufacturing techniquesSeamless / ERW / EFW/ Welded / Fabricated / CDW/ LSAW/ Seam-Welded / Redrawn
Origin of Duplex 2507 Stainless Steel pipe materialIndian, 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"
FormRound, Square, Rectangular
Super Duplex Alloy 2507 Pipe LengthSingle Random, Double Random & Required Length End: Plain End, Beveled End, Treaded
2507 Super Duplex Stainless Steel Pipe Delivery ConditionAnnealed and Pickled, Hot Finished, Polished, Bright Annealed, Cold Drawn

Sizes of ASTM A815 UNS S32750 Fittings

SeamlessWelded
ElbowsUpto 24"Upto 42"
TeesUpto 24"Upto 36"
ReducersUpto 24"Upto 48"
End CapsUpto 24"-
Return BendsUpto 8"-
CrossUpto 8"Upto 36"
Swage NippleUpto 4"-
Special Fittings: Piggable Bends, 3D, 5D, 10D etc. Customized Bends, Miter BendsAs per customer drawings and datasheets-
ThicknessSch 5, Sch 5s, Sch 10, Sch 10s, Sch 20, Sch 30, Sch 40s, Sch 40, 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 Chemical Composition

GradeCMnSiPSCrMoNiNFe
S327500.030 max1.20 max0.80 max0.035 max0.020 max24.00 – 26.003.00 – 5.006.00 – 8.000.24 – 0.3258.095 min

Super Duplex Stainless Steel Mechanical Properties

GradesDensity (g/cm 3)Density (lb/in 3)Melting Point (°C)Melting Point (°F)
S32750 / S327607.80.28113502460

Industrial Application of Super Duplex Stainless Steel Sheets

Defence & Aerospace

Defence & Aerospace

We are one of the leading supplier, stockist, exporter and trader of wide range of industrial materials and sourcing globally to our customers.

Oil/Gas

Oil/Gas

We are one of the leading supplier, stockist, exporter and trader of wide range of industrial materials and sourcing globally to our customers.

Speciality Valves & Vacuum

Speciality Valves & Vacuum

We are one of the leading supplier, stockist, exporter and trader of wide range of industrial materials and sourcing globally to our customers.

Precision Components

Precision Components

We are one of the leading supplier, stockist, exporter and trader of wide range of industrial materials and sourcing globally to our customers.

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FAQ

What are super duplex stainless steel sheets used for?

Super duplex stainless steel sheets are used in a wide range of applications, including the manufacturing of offshore platforms, chemical and petrochemical processing equipment, and desalination plants. They are also used in the construction of bridges and other structures that require high strength and resistance to corrosion.

What are the benefits of using super duplex stainless steel sheets?

Super duplex stainless steel sheets offer several benefits over other types of sheets, including their high strength, durability, and resistance to corrosion, erosion, and stress cracking. They are also highly resistant to pitting and crevice corrosion, making them ideal for use in harsh environments.Know more

What grades of super duplex stainless steel are available in sheet form?

Some of the most common grades of super duplex stainless steel used for sheets include SAF 2507, Zeron 100, and UNS S32760.Know more

What is the manufacturing process for super duplex stainless steel sheets?

Super duplex stainless steel sheets are typically manufactured through a process called hot rolling or cold rolling, where a heated or cold metal billet is passed through a series of rollers to reduce its thickness to the desired size. The sheets are then cut to the required length and width and undergo various finishing processes, such as annealing or pickling.

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