Super Duplex Pipes - Steamline Industries Ltd

Stainless Steel Super Duplex Pipes

ASTM A790 Super Duplex pipes engineered for the world’s most aggressive environments, delivering exceptional mechanical strength and outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking.

What Are Super Duplex Stainless Steel Pipes?

Super Duplex stainless steel represents the highest-performance category within the duplex family. With elevated chromium, molybdenum, and nitrogen content, these alloys offer exceptional resistance to seawater corrosion, chlorides, acidic media, and high-pressure service conditions.

At Steamline Industries, we manufacture ASTM A790 Super Duplex stainless steel pipes in both seamless and welded configurations, supplying offshore projects, subsea systems, desalination plants, chemical processing facilities, and EPC contractors worldwide.

Key Features & Advantages

Exceptional Mechanical Strength

Provides approximately three times the yield strength of conventional 316L stainless steel.

Outstanding Corrosion Resistance

Delivers superior protection against pitting, crevice corrosion, and stress corrosion cracking.

Excellent Seawater Performance

Performs reliably in chloride-rich and highly aggressive marine environments.

High Pressure & Temperature Capability

Suitable for demanding HPHT and subsea applications.

Cryogenic Toughness

Maintains impact resistance and structural integrity at temperatures down to -46°C.

Reliable Sour Service Performance

Designed for H₂S environments and applications requiring NACE MR0175 / ISO 15156 compliance.

Specifications Table

Specification	Details
Standard	ASTM A790 / ASME SA790
Grades	UNS S32750 (2507), UNS S32760 (Zeron 100)
Type	Seamless & Welded
Size Range	½” NB to 10″ NB
Schedule	SCH 5S to SCH 80S
Yield Strength	S32750 (550 MPa), S32760 (550 MPa)
PREN	≥42
Surface Finish	Annealed & Pickled (AP), Solution Annealed
End Finish	Plain End, Bevelled
Testing	Hydrostatic, PMI, IGC (ASTM A262), Tensile, Impact (-46°C), Hardness, Ferrite Content, Ultrasonic

Why Choose Our Super Duplex Stainless Steel Pipes?

✓

PREN ≥42

Among the highest corrosion resistance levels available in commercial stainless steel alloys.

✓

Exceptional Strength

Approximately three times the yield strength of conventional 316L stainless steel, enabling lighter and more efficient designs.

✓

Superior Seawater Resistance

Outstanding performance in chloride-rich, acidic, and marine environments.

✓

Cryogenic Toughness

Maintains excellent toughness and impact resistance even at temperatures down to -46°C.

✓

HPHT Suitable

Recommended for high-pressure and high-temperature subsea applications.

✓

NACE MR0175 / ISO 15156 Compliant

Suitable for sour service and H₂S environments.

Industry Applications

Chemical & Petrochemical

Marine Equipment’s

Oil & Gas Extraction

Pulp & Paper Industry

Desalination Plants

Subsea Flowlines and Risers

Seawater Cooling Systems

Hydrocarbon Processing

Flue Gas Desulfurization (FGD)

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.

Duplex Pipes

Stainless Steel Duplex Pipes

Duplex Pipes Engineered for Superior Strength and Corrosion Resistance.

Welded U-tubes

Stainless Steel Welded U-Tubes

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

Need Super Duplex Stainless Steel Pipes for Extreme Service Conditions?

Engineered for offshore, subsea, desalination, chemical processing, and other highly corrosive applications where conventional stainless steels cannot perform.

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.

GET IN TOUCH

Discuss your industrial needs.

Tell us about your project and our engineering team will help you identify the right equipment or custom solution.

Steamline Assistant

Get a quote