Duplex and Super Duplex Steel Tube Fittings
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Duplex and Super Duplex steel tube fittings are mostly found in high pressure, high corrosion industrial systems and in which reliability and strength are crucial. These fittings have a high resistance to pitting, stress corrosion cracking, and vigorous chloride conditions and are therefore suitable in offshore, chemical, marine, and oil and gas. They are manufactured to ASTM A815 standards and are known to have a high level of consistency in performance, dimensional tolerance and extended service life in challenging applications. S31803 and S32205 are duplex, which provide high mechanical strength; S32750 and S32760 are Super Duplex that have better corrosion resistance in severe conditions. Aashish Metals has introduced a complete product line of tube elbows, tees, unions, reducers and instrumentation fittings to the critical pipelines and fluid control systems. Every fitting is made out of certified raw materials in order to guarantee quality, durability and adherence to international industrial standards.
Overview of Duplex and Super Duplex Tube Fittings
Duplex and Super Duplex tube fittings are provided to industries that need high strength, corrosion-resistant and long term reliability in hostile operation environments. These fittings combine strength of ferritic stainless steel and corrosion resistance of austenitic grades and therefore suitable in high pressure fluid industries, seawater high-pressure, and chemical processing systems. Duplex Steel products like S31803 and S32205 are extremely resistant to pitting and stress corrosion cracking as well as grade-specific information seekers can visit our special page to S31803 and S32205 tube fittings to access the exact specifications and configurations.
Such grades as Super Duplex S32750, S32760 do provide superior service in aggressive chloride corrosion and off shore services, and engineers seeking high-performance and high-strength solutions can visit our S32750 and S32760 tube fittings page to get more details.
These tube fittings are manufactured according to the ASTM A815 standards and therefore have a high level of dimensional accuracy, pressure integrity, and uniform mechanical properties. Aashish Metals is a compression, ferrule, instrumentation, elbow, tee, reducer, and adapter suppliers of pipelines and instrumentation line fittings that are designed to be critical. Duplex and Super Duplex tube fittings are the materials of choice in the refineries, marine systems, desalination facilities and oil and gas jobs because of their durability, low costs and capacity to operate in corrosive media.
- Grades and Materials in Duplex and Super Duplex Tube Fittings
- Specifications of Duplex and Super Duplex Tube Fittings
- Mechanical Properties of Duplex and Super Duplex Tube Fittings
- Chemical Composition of Duplex and Super Duplex Tube Fittings
- Equivalent Grades for Duplex and Super Duplex Tube Fittings
- Applications of Duplex and Super Duplex Tube Fittings
- Why Aashish Metals for Duplex and Super Duplex Tube Fittings?
- Frequently Asked Question for Duplex and Super Duplex Tube Fittings
Grades and Materials in Duplex and Super Duplex Tube Fittings
Grades and Materials in Duplex and Super Duplex Tube Fittings
Duplex Steel S31803 tube fittings are designed to serve systems which need to have a balanced mechanical strength and localized corrosion resistance. This grade provides a dual phase microstructure that improves toughness but is also stable in varying pressures and temperatures. S31803 fittings can be used in the heat exchangers, utility water systems, and industrial cooling lines due to their reliability in a mild chloride environment. Their high yield strength enables them to use thin wall sections without affecting integrity and this lowers the overall system weight and enhances cost effectiveness. To provide a suitable control of the flow in the problematic piping assemblies and ensure stable sealing functioning, Aashish Metals offers S31803 elbows, tees, unions and adapters. Such fittings are popular in paper mills, food processing equipment and in general industrial use where a high degree of reliability in corrosion resistance and mechanical life is necessary.
Duplex Steel S32205 Tube Fittings
Duplex Steel S32205 tube fittings are produced to meet higher specification demanding set ups that involve superior resistance to pitting and stress corrosion cracking. Having a better nitrogen concentration and refined duplex structure, S32205 provides better mechanical strength and stable performance even in moderately aggressive chloride environments. These fittings are best suited to chemical plants, brine handling systems and high pressure utility pipelines. They have a high fatigue strength, and hence would be durable in continuously cyclic loaded systems. Aashish Metals offers S32205 compression fittings, ferrule fittings, instrumentation components that aid accurate control of flow and leak free sealing. S32205 is selected by industries because of its long service life, low maintenance needs and the ability to work with most industrial fluids, which is why it is a credible option in the problems of advanced engineering work.
Super Duplex Steel S32750 Tube Fittings
Super Duplex Steel S32750 tube fittings are produced to meet the needs of very corrosive environments in which extreme strength and pitting resistance are paramount. This grade has a high level of chromium, molybdenum and nitrogen thus being more impervious to seawater, acidic medium and high-chloride atmosphere. The fittings S32750 are effective in offshore platforms, desalination plants and subsea equipment where a constant exposure to harsh environments is the norm. They are also very strong in tensile strength such that they can resist extreme pressure hence preferred in critical flow control lines and deep-water systems. Aashish Metals manufactures S32750 fittings, tees, reducers, and adapters which are designed to provide better handling of fluid as well as structural stability. The fittings have the benefit of offering long-term working reliability in the industries characterized by utmost corrosion resistance and mechanical endurance.
Super Duplex Steel S32760 Tube Fittings
The Super Duplex Steel S32760 tube fittings are engineered to serve extreme-service applications in which the corrosion resistance and the impact strength are the most important. This grade has an optimal content of alloy that media extreme performance in seawater, sour gases, and acidic slurry. The S32760 fittings are also very resistant to crevice corrosion and attack by chloride, which makes it appropriate in petrochemical plants, offshore drilling systems, and high-pressure injection lines. They have a high fatigue strength that enables them to operate continuously in the dynamic systems where vibration and pulsation exists. Aashish Metals manufactures machined tube fittings (S32760) with high potential to provide tight sealing, dimensional control and resistances to pressure. These fittings are used by engineers in important infrastructures where safety, life and resistance to aggressive media are paramount.
Duplex 2205 and Super Duplex 2507 Tube Fittings
Duplex 2205 and Super Duplex 2507 tube fittings find application in most industries and they are designed to meet the various corrosion and pressure levels. Duplex 2205 is a good strength and corrosion resistant material, and is suitable in piping systems, heat recovery units, and water networks. Super Duplex 2507 is even stronger and more resistant to pitting gives it the best resistance to seawater, chemical and heavy industrial applications such as desalination and in the underwater pipelines. Aashish Metals is offering be it the grades in both elbow, tees, reducers, as well as instrumentation fittings that are designed to provide precise flow and long durability. The reason why these fittings are preferred is that they are reliable and they can perform well in harsh environments.
Specifications of Duplex and Super Duplex Tube Fittings
| Specification | Details |
|---|---|
| Material Grades | Duplex S31803, Duplex S32205, Duplex 2205, Super Duplex S32750, Super Duplex S32760, Super Duplex 2507 |
| Material Standard | ASTM A815 for Duplex and Super Duplex tube fittings |
| UNS Numbers | S31803, S32205, S32750, S32760 |
| WNR Numbers | 1.4462 for Duplex grades, 1.4410 for Super Duplex grades |
| Chromium Content | Duplex 21 to 23 percent, Super Duplex 24 to 26 percent |
| Nickel Content | Duplex 4.5 to 6.5 percent, Super Duplex 6 to 8 percent |
| Molybdenum Content | Duplex 2.5 to 3.5 percent, Super Duplex 3 to 4 percent |
| Tensile Strength | Duplex 620 to 650 MPa minimum, Super Duplex 795 to 800 MPa minimum |
| Yield Strength | Duplex 450 MPa minimum, Super Duplex 550 MPa minimum |
| Elongation | 25 percent minimum for all grades |
| Corrosion Resistance | High resistance to pitting and stress corrosion for Duplex, superior resistance to chlorides and seawater for Super Duplex |
| Suitable Applications | Offshore systems, desalination plants, chemical processing, high pressure pipelines, marine systems, utility water lines |
Mechanical Properties of Duplex and Super Duplex Tube Fittings
| Mechanical Property | Details |
|---|---|
| Tensile strength Duplex | Typically 620 to 650 MPa minimum for grades S31803 and S32205 |
| Tensile strength Super Duplex | Typically 795 to 800 MPa minimum for grades S32750 and S32760 |
| Yield strength Duplex | Around 450 MPa minimum for standard Duplex tube fittings |
| Yield strength Super Duplex | Around 550 MPa minimum for Super Duplex tube fittings |
| Elongation | Minimum 25 percent for most Duplex and Super Duplex grades |
| Hardness | Controlled as per ASTM A815 requirements for pressure and instrumentation fittings |
| Impact strength | Good toughness at low temperatures for critical piping and offshore systems |
Chemical Composition of Duplex and Super Duplex Tube Fittings
| Element | Typical Content Range |
|---|---|
| Chromium | Duplex 21 to 23 percent, Super Duplex 24 to 26 percent |
| Nickel | Duplex 4.5 to 6.5 percent, Super Duplex 6 to 8 percent |
| Molybdenum | Duplex 2.5 to 3.5 percent, Super Duplex 3 to 4 percent |
| Nitrogen | Enhanced levels to improve strength and pitting resistance in all grades |
| Carbon | Low carbon content to reduce carbide precipitation and intergranular attack |
| Manganese and Silicon | Added in controlled amounts for strength and fabrication performance |
| Balance | Remainder primarily iron with balanced duplex microstructure |
Equivalent Grades for Duplex and Super Duplex Tube Fittings
| Grade | Equivalent Grade Details |
|---|---|
| Duplex S31803 | Also referred to as Duplex 2205 with WNR 1.4462 in many standards |
| Duplex S32205 | Commonly supplied as Duplex 2205 with similar mechanical properties |
| Super Duplex S32750 | Known as Super Duplex 2507 with WNR 1.4410 in global specifications |
| Super Duplex S32760 | Super Duplex grade used for sour service and offshore projects, close to 2507 class |
| Standards followed | Tube fittings manufactured in accordance with ASTM A815 and relevant ASME guidelines |
Applications of Duplex and Super Duplex Tube Fittings
Applications use of Duplex and Super Duplex Tube Fittings
- Applied in the offshore oil and gas platforms where high strength and resistance against chlorides are required.
- Best in seawater cooling system, desalination plant, and marine engineering line.
- Applicable in chemical processing facilities that deal with corrosive acids and flowing fluids of high pressure.
- Used in refineries and petrochemical plants as critical flow and instrumentation control systems.
- Used in the pulp and paper industries in preference in the bleaching, digesting, and recovery of chemicals.
- Applicable in high pressure water injection systems and undersea pipelines to improve durability.
- Used in power generation plants, and heat recovery systems and boiler feed lines.
- Applicable in the pharmaceutical and food processing plants that need clean and corrosion resistant piping.
- Common with brine treatment, mining and slurry transport systems.
- Reliable in structural tubing applications where there are adverse environmental conditions of extreme temperatures and corrosive media.
Why Aashish Metals for Duplex and Super Duplex Tube Fittings?
Aashish Metals is a reputable manufacturer of Duplex and Super Duplex tube fittings, which has been able to provide reliable quality, technical and quick service to the world industries. Our products are produced using approved raw materials and meet the requirements of ASTM A815 and other ASME requirements, which result in reliable performance in high-pressure and high-corrosion service. Every fitting is manufactured at high dimensional accuracy, finished and tight tolerances to accommodate important control systems in the operation of offshore, marine, chemical and oil and gas.
Our product assortment includes a comprehensive selection of elbows, tees, unions, reducer, adapters, compression fittings and instrumentation fittings that are capable of withstanding the extreme conditions in the industrial environment. Our customers select Aashish Metals due to our good expertise in materials, competitive prices and prompt delivery in standard and custom size. Our reputation over the long term has been on open supply procedures and traceability, coupled with adhering to project schedules.
Having our own technical department, we assist our clients in the selection of grades, directions of its use, and additional paperwork. You need either Duplex S31803, S32205, or Super Duplex S32750 and S32760, but Aashish Metals guarantees that they will be available when you need it and be able to work around the difficult engineering requirements.
For More Information About Duplex and Super Duplex Tube Fittings? please call +91-22-66362223 / 66394926 or send an email to export@aashishmetal.com
Frequently Asked Question for Duplex and Super Duplex Tube Fittings
Duplex and Super Duplex tube fittings are needed in offshore systems, desalination, chemical processing, and high-pressure fluid pipelines that require the necessary strength and corrosion resistance.
Duplex tube fittings have good mechanical performance in moderate chloride environment, whereas Super Duplex tube fittings have better corrosion resistance and strength in severe seawater and offshore conditions.
Yes, both materials perform well in seawater systems. Super Duplex grades such as S32750 and S32760 provide superior resistance to pitting, crevice corrosion, and chloride attack.
The majority of Duplex and Super Duplex tube fittings are produced according to ASTM A815 and are based on other ASME and MSS requirements regarding dimensional and pressure performance.
These fittings are used in the oil and gas, petrochemical, marine engineering, desalination, paper processing, mining and power generation industries in critical piping and instrumentation lines.
Yes, both materials offer high-pressure performance. Super Duplex grades deliver superior strength, making them suitable for high-pressure injection lines and subsea systems.
Yes, Aashish Metals offers standard and custom size in Duplex S31803, S32205 and Super Duplex S32750, S32760 to meet the project-specific requirements.
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