Looking for high-quality pipes and flanges that are made from duplex steel? Look no further than our Duplex Steel Pipe with Flanges! Our pipes and flanges are perfect for a range of applications, from industrial operations to automotive exhaust systems.
We offer a variety of products, including Duplex Stainless Steel Flanges, A790 UNS S31803 Pipe, and Super Duplex Flanges. We also offer Duplex 2205 Flanges, Duplex Steel Flanges, and ASTM A182 F51 Duplex Stainless Steel Flanges. Our Super Duplex Steel Flanges are top-of-the-line and always meet your specific needs.
In addition to our wide selection of products, we also offer ASTM A790 UNS S31803 Pipe and ASTM A928 UNS S31803 Welded Pipes. These pipes are perfect for a range of applications, including chemical and industrial processing applications. We also offer 2205 Duplex Stainless Steel Pipe, which is known for its durability, strength, and resistance to corrosion.
Our Steel Pipe With Flanges and Exhaust Pipe With Flanges are perfect for any application that requires a strong, durable, and reliable piping system. All of our products are made from the highest quality materials, ensuring that you always receive the best possible product.
If you're looking for a reliable and trustworthy supplier of Duplex Steel Pipe with Flanges, look no further than us. We offer a wide selection of products to meet your specific needs and always deliver quality products on time and within budget. Contact us today to learn more about our products and services!
Duplex steel pipe with flanges is a pre-fabrication pipe spool that is specifically designed to meet the demanding requirements of corrosive environments. The material used for these flanges and pipes is a high-strength, high-corrosion-resistant alloy that has a combination of austenitic and ferritic microstructures. This combination provides enhanced durability, strength, and resistance to corrosion. This type of pre-fabrication pipe spool is an ideal solution for applications where conventional materials tend to fail.
The use of duplex steel pipes with flanges offers numerous benefits and advantages over conventional materials. The manufacturing process is streamlined, thereby enhancing efficiency and quality control. Moreover, these materials are cost-effective, ensuring that projects are completed within budget. Using these pre-fabrication pipes is also safe since they are designed to meet the required safety standards in the industry.
Numerous industries rely on pre-fabrication pipe spools made from duplex steel pipes with flanges, including the oil and gas industry, mining, chemical processing, water and wastewater treatment, and power generation. In conclusion, duplex steel pipes with flanges are ideal solutions for projects that require high-strength, high-corrosion-resistant materials, making them a preferred option for construction and installation projects in various industries.
- The ASTM A790 is a standard specification for both seamless and welded ferritic/austenitic stainless steel pipes. This specification provides guidelines for the manufacturing of pipes that are composed of both ferritic and austenitic stainless steel. It outlines the necessary testing and inspection procedures that are needed to ensure the quality of these pipes. This standard is important as it ensures that these types of pipes are manufactured to a high degree of accuracy and precision, and that they are able to meet the rigorous demands of a variety of different applications. By following this standard, manufacturers can ensure that their products are safe, reliable, and of the highest quality possible.
- The ASTM A928 specification pertains to the use of electric fusion welding with the addition of filler metal in ferritic/austenitic (duplex) stainless steel pipe. This standard outlines the requirements for achieving a high-quality welded pipe in this specific type of stainless steel.
The main objective of ASTM A928 is to ensure the integrity and durability of the welded pipe. By incorporating electric fusion welding, this process allows for a strong and reliable bond between the stainless steel pipes. Additionally, the use of filler metal helps to enhance the strength and corrosion resistance of the joint.
The specification encompasses various aspects related to the welding process, including the selection of appropriate welding equipment, procedures, and parameters. It also outlines the requirements for the chemical composition, mechanical properties, and dimensions of the duplex stainless steel pipe.
The ASTM A928 specification promotes consistency and standardization in the manufacturing of ferritic/austenitic stainless steel pipes. It provides guidelines for the industry to meet the necessary quality and performance standards. Manufacturers and users alike can refer to this standard to ensure that the welded pipes they produce or utilize meet the required criteria.
Overall, ASTM A928 is a crucial standard that plays a significant role in the production and use of ferritic/austenitic stainless steel pipes welded using electric fusion with the addition of filler metal. It ensures the structural integrity, strength, and durability of these pipes, making them suitable for various applications in industries such as oil and gas, chemical processing, and marine environments.
- ASTM A182 is a widely recognized standard specification for a wide range of products used in high-temperature service. This specification covers forged or rolled alloy-steel pipe flanges, forged fittings, valves, and various parts that are specifically designed to withstand high temperatures.
The main purpose of ASTM A182 is to ensure the quality and performance of these products in demanding and extreme temperature conditions. By adhering to this standard, manufacturers and suppliers can ensure that their products meet the required specifications and are capable of withstanding the challenging environments they are exposed to.
One of the key aspects emphasized in ASTM A182 is the use of alloy-steel material for the production of these products. Alloy-steel offers excellent mechanical properties and heat resistance, making it suitable for high-temperature applications. The specification outlines the composition requirements, heat treatment processes, manufacturing methods, and mechanical properties that the products should meet.
ASTM A182 covers a wide range of product types, including pipe flanges, forged fittings, valves, and various parts such as bolting materials, gaskets, and pressure vessel flanges. Each product type has its own specific requirements and testing procedures outlined in the specification. These requirements ensure that the products can effectively perform their intended function and withstand the high temperatures and pressures they are subjected to.
Overall, ASTM A182 is a crucial standard in the industry as it sets the benchmark for the quality, reliability, and performance of alloy-steel pipe flanges, forged fittings, valves, and related parts used in high-temperature service. Manufacturers, suppliers, and end-users can rely on this specification to ensure the safe and efficient operation of their systems and equipment in high-temperature environments.

The chemical composition of Duplex Steel Pipe with Flanges is an essential factor when choosing the right type of piping for your industrial application. It is crucial to understand the chemical makeup of the Duplex Steel as it has a significant impact on its overall performance and durability.
The Duplex Steel Pipe with Flanges consists of two phases, namely ferritic and austenitic phases. The chemical composition of this type of steel is a combination of chromium, nickel, molybdenum, and nitrogen. Chromium is responsible for enhancing the corrosion resistance property of the steel. The nickel and molybdenum are essential for improving the overall strength and durability of the steel while the nitrogen helps in increasing its resistance to pitting and crevice corrosion.
To ensure the high-quality performance of Duplex Steel Pipe with Flanges, it's essential to procure them from a reliable supplier. The manufacturer must use superior raw materials and adhere to industry standards to produce quality steel piping.
In conclusion, the chemical composition of Duplex Steel Pipe with Flanges plays a critical role in its overall performance. Understanding this composition will help you make an informed decision when choosing the right piping for your industrial needs.
| Grade | C≤ | Mn≤ | P≤ | S≤ | Si≤ | Ni | Cr | Mo | N | Cu |
| S31803 / F51 | 0.03 | 2.00 | 0.03 | 0.02 | 1.00 | 4.5–6.5 | 21.0–23.0 | 2.5–3.5 | 0.08–0.20 | - |
| S32205 / F60 | 0.03 | 2.00 | 0.03 | 0.02 | 1.00 | 4.5–6.5 | 22.0–23.0 | 3.0–3.5 | 0.14–0.20 | - |
| S32750 / F53 | 0.03 | 1.20 | 0.035 | 0.02 | 0.80 | 6.0-8.0 | 24.0-26.0 | 3.0-5.0 | 0.24-0.32 | 0.5 |
| S32760 / F55 | 0.05 | 1.00 | 0.03 | 0.01 | 1.00 | 6.0-8.0 | 24.0-26.0 | 3.0-4.0 | 0.20-0.30 | 0.50–1.00 |
Duplex Stainless Steel Pipe with Flanges Mechanical Properties
| Mechanical properties | Tensile, min, ksi[MPa] | Yield, min, ksi[MPa] | Elongation, %(min) | Hardness, HB(max) |
| S31803 | 90 [620] | 65 [450] | 25 | 290 |
| S32205 | 95 [655] | 65 [450] | 25 | 290 |
| S32750 | 116 [800] | 80 [550] | 15 | 300 |
| S32760 | 109 [750] | 80 [550] | 25 | 300 |
Advantages of Duplex Steel Pipe with Flanges Include:
1. Improved Efficiency and Time-Savings
Pre-fabrication pipe spools come pre-assembled, which means they are pre-cut, fitted, and welded, minimizing the need for on-site fabrication, assembly, and welding. This enhances efficiency, saves time, and reduces labor costs, allowing faster pipeline installation and commissioning, and improved project timelines.
2. Enhanced Quality Control
Pre-fabrication pipe spools are manufactured in controlled environments with precise measurements, testing, and quality control about duplex stainless steel flanges and UNS S31803 pipe to ensure high standards of quality and performance. This reduces the risks of errors, defects, and rework and increases the reliability, safety, and longevity of the pipelines.
3. Reduced Costs
Prefabricated piping spools duplex steel pipe with flanges can be engineered, designed, and manufactured to meet the exact specifications and requirements of the project, ensuring maximum material utilization and minimizing wastage and scrap costs. This helps to reduce project costs, enhance cost-effectiveness, and improve the return on investment.
4. Minimized On-Site Disruptions
Pre-fabrication pipe spools reduce on-site disruptions, noise, and safety risks, as they can be pre-assembled in off-site locations, away from the construction sites. This minimizes the need for heavy equipment, machinery, and personnel on-site, reducing safety risks, traffic congestion, and environmental impacts.
5. Superior Corrosion Resistance
Duplex steel pipe with flanges offers superior corrosion resistance and durability compared to conventional materials, making them ideal for harsh and corrosive environments. This reduces the risks of pipeline failure, leaks, and maintenance and repair costs, extending the lifespan of the pipelines and maximizing production uptime.
Hot Tags: duplex steel pipe with flanges, China duplex steel pipe with flanges manufacturers, suppliers


