Duplex Steel Pipes

Name: Duplex Steel Pipes
Brand: JAYANT IMPEX
Price: 650.0 INR
Availability: InStock

650.0 INR/Piece

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Product Details:

Temperature Range -50C to 300C
Sealing Type Metal to Metal
Coating Type No External Coating / Customized
Diameter 6 mm to 630 mm
Bend Radius As per design/customer specification
Connection Type Butt Weld, Threaded, Flanged
Tolerance 0.5 mm
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Duplex Steel Pipes Price And Quantity

Price 650.0 INR/Piece
Minimum Order Quantity 1 Piece

Duplex Steel Pipes Product Specifications

Outer Diameter 6 mm to 630 mm
Surface Treatment Polished
Temperature Range -50C to 300C
Diameter 6 mm to 630 mm
Product Type Pipe
Coating Type No External Coating / Customized
Color Metallic Silver
Shape Round
Length Single Random, Double Random & Custom Length
Sealing Type Metal to Metal
Standard ASTM A789, ASTM A790, ASME SA789, ASME SA790
Usage Industrial, Chemical, Oil & Gas, Structural
Thread Type NPT, BSPT
Section Shape Circular
Tolerance 0.5 mm
Connection Type Butt Weld, Threaded, Flanged
Bend Radius As per design/customer specification
Application Piping, Heat Exchangers, Pressure Vessels, Marine
Thickness 1 mm to 50 mm
Rated Pressure Up to 6000 psi
Yield Strength 450 MPa min
Connection Welded & Seamless
Material Grade UNS S31803, UNS S32205, UNS S32750, UNS S32760
Tensile Strength 620 MPa min
Material Duplex Stainless Steel
Flexibility Rigid

End Type Plain End, Beveled End, Threaded End
Corrosion Resistance Excellent
Packaging Wooden Cases, Hexagonal Bundles, Wrapped with Plastic
Inspection Ultrasonic, Eddy current and Hydro testing
Production Method Cold Drawn / Hot Rolled
Delivery Condition Annealed & Pickled
Heat Treatment Solution Annealed
Density 7.8 g/cm3
Elongation 25% min
Available Sizes Customized as per Requirement
Magnetic Properties Slightly Magnetic

Product Description

Main Classifications & Grades

Duplex alloys are categorized by their Pitting Resistance Equivalent Number (PREN), calculated as:

Family	Common Grade	UNS / Werkstoff	Typical PREN	Primary Advantage
Lean Duplex	2101 / 2304	UNS S32101 / 1.4162 UNS S32304 / 1.4362	2428	Low nickel content; economical 304/316 substitute for non-critical environments.
Standard Duplex	2205	UNS S31803 / UNS S32205 1.4462	3436	Workhorse grade combining high yield strength (~450 MPa) with high chloride SCC resistance.
Super Duplex	2507 / Zeron 100	UNS S32750 / 1.4410 UNS S32760 / 1.4501	4245	High Mo + N content; built for sour gas, high-temperature marine, and concentrated acid service.
Hyper Duplex	2707	UNS S32707 / 1.4658	>48	Extreme pitting and crevice corrosion resistance in severe subsea and aggressive chemical media.

Key Industry Standards & Specifications

When ordering or specifying duplex pipe schedules and pressure ratings, common ASTM/ASME standards include:

ASTM A790 / ASME SA790: Standard specification for seamless and welded ferritic/austenitic stainless steel pipe.
ASTM A928: Specification for ferritic/austenitic (duplex) stainless steel pipe electric-fusion welded with addition of filler metal.
ASTM A815: Standard specification for wrought ferritic/austenitic stainless steel piping fittings.
NACE MR0175 / ISO 15156: Requirements for duplex materials used in sour environments in oil and gas production.

Fabrication & Welding Note: Welding duplex pipes requires tight heat input control (typically 0.52.5 kJ/mm) and shielded back-purging (e.g., $98% text{Ar} + 2% text{N}_2$ to preserve the critical 50:50 ferrite-austenite phase balance and prevent brittle intermetallic phase formation between 600C and 1000C.

Unmatched Corrosion Resistance and Strength

Duplex steel pipes boast outstanding resistance to corrosive environments due to their dual-phase microstructure and high-quality materials, making them indispensable in demanding industries such as chemical, oil & gas, marine, and structural applications. Their mechanical strength, combined with a minimum elongation of 25%, ensures long service life and cost savings through reduced maintenance.

Precision Engineering for Critical Applications

Manufactured under ASTM and ASME standards (A789, A790, SA789, SA790), duplex steel pipes are produced using advanced processes including cold drawing and hot rolling. Each pipe undergoes stringent inspection methods-ultrasonic, eddy current, and hydro-to guarantee structural integrity, reliability, and optimum performance even under high pressures up to 6000 psi and temperatures ranging from -50C to 300C.

Tailored Solutions and Versatile Configurations

Available in a variety of lengths, diameters, and thicknesses, with connection types like welded, seamless, butt weld, threaded, and flanged, these pipes can be customized to suit diverse project needs. End users in India and beyond benefit from multiple end types, surface finishes, and packaging options, ensuring a seamless fit for every industrial requirement.

FAQ's of Duplex Steel Pipes:

Q: How are duplex steel pipes manufactured and tested for quality?

A: Duplex steel pipes are manufactured using cold drawn or hot rolled methods, followed by solution annealing and pickling. Quality assurance involves rigorous inspections such as ultrasonic, eddy current, and hydro testing to detect flaws and ensure structural integrity, meeting the requirements of ASTM and ASME standards.

Q: What makes duplex steel pipes suitable for corrosive environments?

A: Duplex steel pipes excel in corrosive environments due to their unique dual-phase stainless steel composition, providing excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. This makes them ideal for industries handling aggressive chemicals, seawater, or harsh processing conditions.

Q: When should I choose duplex steel pipes over conventional stainless steel?

A: Duplex steel pipes should be selected when higher strength, excellent corrosion resistance, and durability are essential-particularly in chemical processing, oil & gas, marine, and structural applications requiring long service life and reliability under high stress and pressure.

Q: Where can duplex steel pipes be applied most effectively?

A: These pipes are commonly utilized in industrial sectors including piping systems, heat exchangers, pressure vessels, and marine applications. Their robust properties make them especially effective in environments exposed to corrosive fluids, high pressures, and fluctuating temperatures.

Q: What are the available sizes and connection types for duplex steel pipes?

A: Duplex steel pipes are available in diameters from 6 mm to 630 mm, thicknesses ranging from 1 mm to 50 mm, and can be supplied in single random, double random, or custom lengths. Connection options include welded, seamless, butt weld, threaded (NPT, BSPT), and flanged ends to suit varied installation needs.

Q: How are duplex steel pipes packaged and delivered to ensure safety?

A: For optimal protection during transit, duplex steel pipes are generally packaged in wooden cases, hexagonal bundles, or wrapped with plastic. Pipes are delivered in an annealed and pickled condition, ensuring surface cleanliness and corrosion resistance upon arrival.

Q: What benefits do duplex steel pipes offer compared to other pipe materials?

A: Duplex steel pipes offer a superior strength-to-weight ratio, excellent corrosion resistance, and higher mechanical performance, translating to improved durability and lower maintenance. Their magnetic properties, surface finish options, and customizable dimensions add further value for industrial users.

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