Super Duplex Steel Pipes Manufacturer and Supplier Thailand

Super Duplex steel pipe is a pipe with higher chromium, molybdenum, and nitrogen content than duplex steel pipes, offering greater strength and corrosion resistance. Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd., based in Chon Buri, is a trusted manufacturer of super duplex steel pipes. These pipes are available in various sizes, grades like UNS S32750 and S32760, with tight tolerances to meet demanding project requirements. We use advanced processes such as cold drawing and seamless extrusion to ensure premium product quality. These pipes are widely used in oil & gas, marine, chemical processing, and construction industries. We offer competitive super duplex pipe price with full customization options which makes us a leading super duplex pipe manufacturer in Thailand.

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Product Information of Super Duplex Stainless Steel Pipes

Super Duplex Stainless Steel Pipes are high-alloy stainless steel pipes with a dual-phase microstructure consisting of austenite and ferrite in roughly equal proportions.Known for their high strength, and pitting resistance, these pipes are ideal for use in aggressive environments such as high-impact wells, offshore platforms, and chemical processing units. Their duplex microstructure offers superior performance over standard stainless steel grades, especially in chloride-rich conditions.

These pipes are highly favoured due to their exceptional yield strength (typically around 550 MPa), tensile strength (up to 800 MPa), elongation of 25% minimum, and impressive hardness (max 32 HRC). They also offer excellent weldability and a high surface finish, making them suitable for both structural and fluid transport applications. Available in a wide range of industry standard sizes with outer diameters ranging from ½” to 24”, wall thicknesses from Sch10 to Sch160, and lengths up to 12 meters or as per custom requirement.

Benefits of Super Duplex Stainless Steel Pipes

Explore the pipe advantages of Super Duplex Stainless Steel Pipes, trusted for performance and reliability across demanding industries.

Super Duplex pipes offer exceptional resistance to pitting and crevice corrosion, especially in chloride-rich environments, ensuring longevity and reliability.

With a combination of high strength and durability, Super Duplex pipes are designed to withstand extreme pressure and high-impact conditions, making them ideal for critical applications.

These pipes are highly resistant to wear and tear, providing extended service life and reducing the frequency of replacements and repairs.

Super Duplex pipes can be easily welded with minimal risk of corrosion, offering flexibility in construction and fabrication.

While the initial cost may be higher, their durability and low maintenance needs make them a cost-effective solution over the long term.

These pipes are perfect for use in harsh conditions, such as high-impact wells, offshore drilling, and chemical processing plants, thanks to their robust properties.

Why Choose Thaida for Super Duplex Steel Pipes Needs?

We are a trusted super duplex steel pipe supplier in Thailand, known for delivering high-quality piping products that meet international standards such as ISO, ASTM, and ASME. We ensure quick delivery of super duplex pipe, backed by competitive pricing, superior customer service and support, and consistent product reliability. Our commitment to quality and customer satisfaction sets us apart in the market.

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Super Duplex Steel Pipes Specifications

The super duplex steel pipe specification table details key technical aspects such as sizes, form, thickness, length, types and more to help you select the right pipe for your needs.

Specification	ASTM A790 / ASME SA790
Outer Diameter	6.00 mm OD up to 250 mm OD, Sizes up to 12” NB
Form	Round Pipes/Tubes, Square Pipes/Tubes, Rectangular Pipes/Tubes, Coiled Tubes, “U” Shape, Pan Cake Coils, Hydraulic Tubes
Thickness	0.3mm – 50 mm
Length	Single Random, Double Random & Required Length
Types	Seamless
End	Plain End, Beveled End, Treaded

Types of Super Duplex Pipes

The details of types of Super Duplex Pipes such as round, square, welded etc are as follows:

At Thaida, we only provide high-quality Super Duplex Stainless Steel Seamless Pipes

Super Duplex Steel Pipes Sizes & Schedule Chart

Super Duplex Steel Pipes size chart details the standard sizes, outside diameter, wall thickness and more to help you select the right pipe size for your application.

Nominal Pipes Size		1/8	3/8	3/4	1	1-1/2	2	3	4	6	8	10	12
Outside Diameter		.405	.675	1.05	1.315	1.9	2.375	3.5	4.5	6.625	8.625	1 .75	12.75
Schedule 40	Wall Thickness	.068	.091	.113	.133	.145	.154	.216	.237	.28	.322	.365	.406
Schedule 80	Wall Thickness	.095	.126	.154	.179	.2	.218	.3	.337	.432	.5	.594	.688

Super Duplex Steel Pipes Manufacturing Process

The process of manufacturing super duplex steel pipe is divided into five stages which is outlined below.

1. Raw Material Selection

High-quality super duplex steel billets and strips are carefully selected for superior strength and corrosion resistance.

2. Pipes Formation
The selected raw material is formed into pipes using seamless extrusion methods, depending on the application.

3. Heat Treatment
Pipes undergo required controlled heat treatment to enhance mechanical properties and relieve internal stresses.

4. Cold Working & Finishing
After heat treatment, pipes are cold-worked for better surface finish, dimensional accuracy and improved strength.

5. Quality Control and Testing
Every pipe is thoroughly inspected and tested to ensure it meets international quality standards for performance and reliability.

Applications for are Super Duplex Steel Pipes

Super Duplex steel pipes are primarily used in offshore oil and gas platforms for transporting corrosive fluids under high pressure. They are also widely used in desalination plants, chemical processing units, and marine environments due to their ability to withstand aggressive conditions.

Oil and Gas Industry

Marine Applications

Chemical Industry

Petrochemical Industry

Power Plants

Aerospace & Defense

Automotive and Transportation

Desalination Plants

Pulp and Paper Industry

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FAQ Of Super Duplex Stainless Steel Pipes

What is super duplex pipe?

A super duplex pipe is a tube made from a type of stainless steel with a “duplex” microstructure, containing an equal mix of austenite and ferrite phases. This balanced, two-phase structure gives the material a unique combination of properties. Super duplex grades are enhanced with higher levels of chromium, molybdenum, and nitrogen compared to standard duplex steels.

What is the composition of super duplex steel?

The composition of super duplex steel is what sets it apart. While specific grades like S32750 and S32760 have minor variations, a typical composition includes approximately 24-26% chromium, 6-8% nickel, and 3-5% molybdenum. A key element is nitrogen, typically present at 0.24-0.32%, which significantly enhances its strength and resistance to pitting corrosion. The remainder of the composition is primarily iron. This careful balance of elements is crucial for maintaining the dual-phase structure.

What is the difference between duplex steel and super duplex steel?

The primary difference lies in the alloying content and performance. Super duplex steel has a higher concentration of chromium, molybdenum, and nitrogen than standard duplex steel. This enriched chemical composition gives super duplex a higher Pitting Resistance Equivalent Number (PREN), a measure of its resistance to localized pitting corrosion. Super duplex offers superior strength and corrosion resistance, making it suitable for more demanding applications.

Is super duplex steel magnetic?

Yes, super duplex steel is magnetic. Its magnetism comes from the ferrite phase in its microstructure. While austenitic stainless steels (like 304 or 316) are generally non-magnetic, the significant ferrite content in the duplex structure gives the material its magnetic properties. This can be a useful characteristic for sorting materials in recycling facilities.

What industries commonly use Super Duplex Steel Pipes?

Due to its exceptional strength and corrosion resistance, super duplex steel pipes are widely used in harsh environments. Key industries include oil and gas exploration and production (especially for subsea systems), chemical and petrochemical processing, seawater desalination plants, and marine applications. They are also utilized in pulp and paper production and for components in flue gas desulfurization (FGD) systems.

Are Super Duplex Steel Pipes suitable for high-temperature steam lines?

Super duplex steel pipes are generally not recommended for continuous use at temperatures above 300°C (572°F). While they possess excellent properties at lower temperatures, prolonged exposure to high temperatures can lead to the formation of brittle intermetallic phases. This can significantly reduce the material’s toughness and impact strength, making it unsuitable for high-temperature steam line applications.

What is the maximum allowable pressure for Super Duplex Steel Pipes?

The maximum allowable pressure for a super duplex steel pipe is not a single value; it depends on several factors, including the pipe’s diameter, wall thickness, and the operating temperature. The high mechanical strength of super duplex steel allows it to withstand very high pressures. The exact pressure rating for a specific pipe must be calculated according to relevant design codes and standards, such as ASME B31.3 for process piping.

Can Super Duplex Steel Pipes be supplied in custom lengths?

Yes, it is common practice for manufacturers and suppliers to provide super duplex steel pipes in custom lengths to meet specific project requirements. While standard lengths are readily available, pipes can be cut to precise measurements to minimize waste and facilitate easier installation on site. This customization is a standard service offered within the specialty metals industry.