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Super duplex steel pipes are becoming increasingly popular for their strength and durability. They are made from a combination of stainless steel and ferritic steel, which creates a strong alloy with superior corrosion resistance. This makes them ideal for applications in corrosive environments, as well as in offshore oil and gas operations. Let’s take a closer look at the benefits of Super Duplex Steel Pipes.
One of the main benefits of super duplex steel pipes is their superior strength and durability compared to regular stainless steel pipes. These pipes can withstand higher temperatures, making them suitable for use in high-pressure applications such as power plants, chemical plants, and oil refineries. Additionally, they have high resistance to pitting corrosion and stress corrosion cracking due to their unique alloy composition. This makes them an excellent choice for piping systems that are exposed to harsh conditions or environments with high levels of acidity or alkalinity. Super Duplex Steel S32750 Pipes, Super Duplex Steel Zeron 100 Pipes and many more grades are also available.
Another advantage of super duplex steel pipes is their superior weldability compared to other types of stainless steel pipe materials. This is because they contain more austenite than ferrite in the alloy composition, so they are less prone to forming cracks during the welding process. Furthermore, these pipes can be machined using standard tooling without any special considerations needed – unlike some other types of steels that require special cutting tools or grinding wheels due to their hardness. Different types of products are available, such as Duplex Steel Pipes, Duplex Steel Seamless Pipes, etc.
Finally, super duplex steel pipes offer cost savings over traditional stainless steel pipes due to their increased strength and durability. They also require less maintenance since they are resistant to corrosion and wear-and-tear damage caused by extreme temperatures or pressure changes over time. This helps reduce downtime associated with repairs on older pipe systems that often need frequent maintenance or replacement due to corrosion or fractures caused by age or repeated use.
Super Duplex Stainless Steel ASTM Grades
The American Society for Testing and Materials (ASTM) defines several grades of super duplex stainless steel. These include: ASTM A240 (UNS S32750), ASTM A789/A790 (UNS S32760), ASTM A789/A790 (UNS S32205), ASTM A928/A928M (UNS S32304), ASTM A182 (UNS S32001). Each grade has its own unique properties that make it suitable for specific applications. For example, UNS S32750 has higher strength than UNS S32205 but lower impact toughness, while UNS S32304 has the highest impact toughness but lower yield strength compared to other grades.
The main difference between these grades lies in their chemical composition; each grade features a unique balance of chromium, molybdenum, nickel and nitrogen content which affects the material’s strength, corrosion resistance and weldability. Additionally, each grade also features varying levels of carbon content that can affect machinability and formability. Depending on the application requirements, engineers must carefully consider which grade best meets their needs when specifying super duplex stainless steel materials.
Super Duplex Pipe Specification
Super Duplex steel has been slowly gaining market share over the past several years due to its combination of strength, durability, and corrosion resistance. But what exactly is meant by “Super Duplex”? How can it be distinguished from other types of steel pipes? Let’s break down the basics of Super Duplex pipe specification.
Super Duplex steel is a type of stainless steel used in piping systems and other applications where strength, corrosion resistance, and durability are essential. It is composed primarily of iron and chromium with high levels of molybdenum and nitrogen added to create an alloy with superior mechanical properties. This makes it ideal for applications where extreme conditions such as high temperatures or caustic chemicals may be present. The main advantage of Super Duplex is its ability to resist pitting, crevice corrosion, and stress corrosion cracking even in environments with high chloride concentrations. This makes it especially useful for use in seawater piping systems or any other environment where salt water may be present.
When buying Super Duplex pipes or fittings, there are certain specifications that need to be taken into account. Firstly, the composition should be checked to make sure that it meets industry standards for quality control. Secondly, working pressure ratings should also be checked to ensure that they meet specific application requirements. Lastly, any third-party testing certificates should also be available upon request if necessary. These documents will provide assurance that the product has been manufactured according to strict guidelines and can stand up to even the toughest conditions without failure.
Table of Content
Super Duplex Steel Pipes are pipes made from Super Duplex Steel, typically used in applications where high strength & corrosion resistance are required, such as in the oil & gas industry, chemical processing & marine environments.
The main advantages of Super Duplex Steel Pipes are their high strength, superior corrosion resistance & excellent resistance to stress corrosion cracking. These pipes are also more cost-effective than other high-performance alloys like titanium & nickel alloys.
Super Duplex Steel Pipes are suitable for a wide range of applications, including offshore oil & gas drilling, chemical processing, seawater desalination, marine engineering & pulp & paper manufacturing.
Common grades of Super Duplex Steel Pipes include S32750 and S32760. These grades are characterized by their high levels of chromium, molybdenum & nickel, as well as their excellent resistance to pitting, crevice corrosion & stress corrosion cracking.
| Specification | ASTM A790 ASME SA790 / ASTM A928 ASME SA928 |
| Size | 5.0 mm – 1219.2 mm |
| Outside Diameter | 6.00 mm OD up to 914.4 mm OD, Sizes up to 24” NB available Ex-stock, OD Size Steel Tubes available Ex-stock |
| Finish | Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF |
| Thickness Range | 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS |
| Type | Seamless / ERW / Welded / Fabricated / CDW |
| Form | Round Pipes/Tubes, Square Pipes/Tubes, Rectangular Pipe/Tubes, Coiled Tubes, “U” Shape, Pan Cake Coils, Hydraulic Tubes |
| Length | Single Random, Double Random & Required Length End: Plain End, Beveled End, Treaded |
| End Protection | Plastic Caps |
| Surface Finish | 2B, No.4, No.1, No.8 Mirror Finish for Super Duplex Steel Pipes, Finish as per customer Requirements |
| Delivery Condition | Annealed and Pickled, Polished, Bright Annealed, Cold Drawn |
| Schedule | SCH5, SCH10, SCH40, STD, SCH80, SCH160 |
| Pipe End | Plain End, Beveled End, Treaded. |
Check ASME B36.19 Super Duplex Steel Pipe, A790 Super Duplex Sch 40 Pipe dimensions and thickness chart, SA 928 Pipe and Super Duplex Steel Square Pipe price per meter in India
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Navrang Steel is a prominent manufacturer, supplier, stockist and exporter of Pipes, Forged Fittings, Fasteners, and other industrial products. We stock and supply all these products in various materials, such as Stainless Steel, Duplex and Super Steel, Nickel Alloy, inconel, monel, hastelloy, and various other ferrous and non-ferrous materials.
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