Duplex Pipes - Steamline Industries Ltd

Stainless Steel Duplex Pipes

ASTM A790 Duplex 2205 pipes combining the strength of ferritic stainless steel with the corrosion resistance of austenitic grades for demanding industrial environments.

What Are Duplex Stainless Steel Pipes?

Duplex stainless steel is a two-phase alloy with a balanced microstructure of austenite and ferrite. This combination delivers nearly twice the yield strength of conventional 304 and 316 stainless steels while providing superior resistance to pitting, crevice corrosion, and stress corrosion cracking.

At Steamline Industries, we manufacture ASTM A790 duplex stainless steel pipes in both seamless and welded configurations, supplying EPC contractors, engineering companies, and industrial end users worldwide.

Key Features & Advantages

Exceptional Mechanical Strength

Provides nearly twice the yield strength of conventional 304 and 316 stainless steels.

Outstanding Corrosion Resistance

Delivers excellent resistance to pitting, crevice corrosion, and stress corrosion cracking.

Superior Fatigue Performance

Ideal for cyclic loading and demanding process applications.

Excellent Fabrication Properties

Offers good weldability and ease of installation.

Cost-Effective Material Solution

Provides high performance without the need for more expensive alloys.

Reliable Sour Service Performance

Suitable for H₂S environments and applications requiring NACE MR0175 compliance.

Specifications Table

Specification	Details
Standard	ASTM A790 / ASME SA790
Grades	UNS S31803 / S32205
Type	Seamless & Welded
Size Range	½” NB to 12″ NB
Schedule	SCH 5S to SCH 80S
PREN	≥34
Surface Finish	Annealed & Pickled
Testing	Hydrostatic, PMI, IGC, Impact, Hardness, Ultrasonic
Chemical Composition	Duplex 2205 contains approximately 22% chromium, 5% nickel, 3% molybdenum, and nitrogen additions, providing excellent resistance to pitting, crevice corrosion, and stress corrosion cracking.

Why Choose Duplex Stainless Steel Pipes?

✓

Double the Strength

Nearly twice the yield strength of 304 and 316 stainless steel.

✓

Superior Corrosion Resistance

Excellent resistance to pitting, crevice corrosion, and stress corrosion cracking.

✓

Excellent Weldability

Suitable for fabrication and site welding applications.

✓

High Fatigue Strength

Ideal for dynamic and cyclic loading conditions.

✓

Cost-Effective Alternative

Provides superior performance compared with higher alloy materials in many applications.

✓

NACE MR0175 Compliant

Suitable for sour service and H₂S environments.

Industry Applications

Chemical & Petrochemical

Marine Equipment’s

Oil & Gas Extraction

Pulp & Paper Industry

Desalination Plants

Flowline Applications

OUR PRODUCTS

Explore Our Product Range

Designed for industrial performance with tight tolerances, premium stainless steel grades and global compliance standards.

Heat Exchanger

High Precision & High Pressure Heat Exchanger Tubing

Built for thermal performance and demanding pressure applications.

Hyadrulic & Instrumentation

Hydraulic & Instrumentation Tubing

Precision tubing designed for pressure control and fluid systems.

Seamless Pipes

Stainless Steel Seamless Pipes

High-strength seamless pipes engineered for performance.

Welded Pipes

Stainless Steel Welded Pipes

Consistent quality with dependable industrial durability.

Welded Tubes

Stainless Steel Welded Tubes

Precision welded tubing with smooth finish and reliable performance.

Seamless Tubes

Stainless Steel Seamless Tube

Secure packaging designed for safe handling and worldwide delivery.

Seamless U-Tubes

Stainless Steel Seamless U-Tubes

Precision-Bent Seamless U-Tubes Engineered for Superior Heat Transfer Performance.

Welded U-tubes

Stainless Steel Welded U-Tubes

Precision Welded U-Tubes Engineered for Reliable Heat Transfer Performance.

Super Duplex Pipes

Stainless Steel Super Duplex Pipes

Super Duplex Pipes Engineered for Maximum Strength and Superior Corrosion Resistance.

Need High-Performance Duplex Stainless Steel Pipes?

Engineered for corrosive and demanding environments across oil & gas, marine, desalination, and chemical industries.

CERTIFICATES

Quality You Can Trust

Our certifications and inspection standards reflect our commitment to global manufacturing excellence.

Quality Management System

ISO 9001:2015

Quality Management System — governing our entire production, testing, and delivery process

Environmental Management System

ISO 14001:2015

Environmental Management System — ensuring sustainable and eco-responsible operations

Occupational Health And Safety Management System

ISO 45001 2018

Occupational Health & Safety Management System — protecting our workforce and communities

RESOURCES

Technical Resources & Downloads

Everything your procurement and engineering teams need in one place.

SIL Catalog

Explore the complete range of stainless steel pipes and tubes manufactured by Steamline Industries. The catalog covers seamless pipes, welded pipes, tubes, heat exchanger tubing, hydraulic and instrumentation tubing, U-tubes, duplex, and super duplex products.

Designed for engineers, procurement teams, and industrial buyers, it provides key technical specifications, available grades, dimensions, standards, and application insights across industries including oil & gas, petrochemicals, power generation, pharmaceuticals, and process engineering.

Submit your details to access the latest edition and find the right solutions for your project requirements.

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