Duplex Steel UNS S31803 Seamless Pipe Manufacturer and Supplier in Thailand
Duplex Steel UNS S31803 Seamless Pipes is a pipe made from a specific grade of duplex stainless steel known as UNS S31803. Thaida Stainless Steel Manufacturing (Thailand) Co., Ltd., based in Chon Buri, is a leading supplier of Duplex Steel UNS S31803 seamless pipes, valued for their durability and high performance. Manufactured under strict quality control, these pipes conform to international standards. We offer UNS S31803 pipes in various shapes, sizes, and thicknesses to meet diverse industrial requirements. UNS S31803 is the original duplex grade, while UNS S32205 has slightly higher nitrogen content for improved strength and corrosion resistance. Our pipes complies with ASTM A790 and ASME SA790 standards and undergoes rigorous testing, including hydrostatic and ultrasonic tests. With reasonable pricing, proper certifications, and swift delivery services, we ensure a reliable supply for global clients.
Product Overview: Duplex S31803 Seamless Pipes
Duplex steel S31803 seamless pipes are high-performance pipes made from a duplex stainless steel alloy, designed to provide superior strength and corrosion resistance in challenging environments. It has a balanced microstructure of austenite and ferrite, and being seamless means it is formed without any welded joints, resulting in a continuous, uniform pipe structure. This enhances its mechanical properties, particularly in high-pressure conditions. These pipes are available in various sizes, wall thicknesses, and finishes like pickled and annealed, and are manufactured through seamless extrusion and cold working processes.These pipes offer excellent corrosion resistance while maintaining a lightweight and durable design for various industrial applications.
Advantages of UNS S31803 Seamless Pipes
UNS S31803 Seamless Pipes offer a combination of high strength, excellent corrosion resistance, and long-lasting durability, making them ideal for demanding applications.
High strength and durability
With superior mechanical properties, UNS S31803 pipes can withstand heavy loads and harsh conditions, offering long-term reliability in high-stress applications.
Excellent corrosion resistance
These pipes provide outstanding resistance to corrosion, especially in chloride-rich environments, making them ideal for marine, chemical, and industrial applications.
Superior resistance to stress corrosion cracking
The unique duplex microstructure provides excellent resistance to stress corrosion cracking, which is a critical factor in preventing failure in high-stress environments.
Good weldability and formability
UNS S31803 pipes can be easily welded and formed, ensuring that they can be fabricated into complex structures without compromising their strength or corrosion resistance.
Excellent resistance to pitting and crevice corrosion
The alloy’s composition offers exceptional resistance to localized corrosion such as pitting and crevice corrosion, even in aggressive media like seawater.
Suitable for high-pressure and high-temperature environments
These pipes are capable of handling high-pressure and high-temperature conditions, making them suitable for applications in industries such as oil & gas and power generation.
Long service life in harsh conditions
Due to their high resistance to corrosion and mechanical wear, UNS S31803 seamless pipes provide a long service life, reducing the need for frequent replacements in harsh operational environments.
Why Choose Our ASTM A790 UNS S31803 Seamless Pipes?
We are the leading duplex S31803 seamless pipe manufacturer in Thailand, committed to delivering high-quality pipes that meet international standards. Our ASTM A790 UNS S31803 pipes offer excellent corrosion resistance, high strength, and superior durability for demanding applications. With competitive pricing, custom length options, and timely delivery, we ensure reliable solutions for both industrial and commercial needs. Backed by certifications and test reports, our pipes are trusted for their exceptional performance and longevity.
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UNS S31803 Duplex Steel Seamless Pipes Specification
The below duplex steel S31803 seamless pipe specifications table presents sizes, schedule, length, finish, and standard compliance for quality piping solutions.
| ASTM Specification | ASTM A790 ASME SA790 |
|---|---|
| Standard | ASTM, ASME, JIS, AISI, AMS, EN, SAE, DIN, NF, TOCT, DS, DTD, GB |
| Duplex UNS S31803 pipe Length | Double Random, Single Random, Standard & Cut length Pipes |
| Finish | Polished, AP (Annealed & Pickled), BA (Bright & Annealed), MF, NO.1, NO.4, 2B, BA, HL, 8K, Mirror finish, etc |
| Type of UNS S31803 Alloy Pipes | Seamless |
| Duplex UNS S31803 pipe End | Plain End, Beveled End, Treaded Pipes, Screwed ends |
| Marking on Duplex UNS S31803 Pipes | All ASTM A790 Duplex UNS S31803 Pipes are marked as follows: Standard, Grade, OD, Thickness, Length, Heat No. (Or according to the customer’s request.) |
| Application of Duplex UNS S31803 Pipes | Dairy Pipes, Oil Pipes, Gas Pipes, Fluid Pipes, Boiler Pipes for Chemical Industry |
| Value Added Service | Draw & Expansion as per required Size & Length, Polish (Electro & Commercial) Annealed & Pickled Bending, Machining Etc. |
Equivalent Grades of S31803 Seamless Pipes
Duplex steel S31803 seamless pipe equivalent table includes international material codes, DIN numbers, and UNS numbers.
| STANDARD | UNS | WERKSTOFF NR. |
|---|---|---|
| Duplex 31803 Pipes | S31803 / S32205 | 1.4462 |
Chemical Composition of UNS S31803 Seamless Pipes
This chemical composition table for UNS S31803 pipes outlines percentages of major elements like carbon, chromium, nickel, and molybdenum.
| C | N | P | Si | Mn | Mo | Fe | Cr | S | Ni |
|---|---|---|---|---|---|---|---|---|---|
| 1.0 | 0.03 | 0.02 | 2.0 | 3.0 - 3.5 | 22.0 - 23.0 | 0.03 | 4.5 - 6.5 | 0.14 - 0.2 | Bal |
Mechanical Properties of Duplex Stainless Steel S31803 Seamless Pipes
Below are the mechanical properties of UNS S31803 duplex steel pipes, such as tensile strength, yield strength, elongation, and more.
| Density | Melting Point | Yield Strength (0.2% Offset) | Tensile Strength | Elongation |
|---|---|---|---|---|
| 7.8 g/cm³ | 1350 °C (2460 °F) | Psi - 80000, MPa - 550 | Psi - 116000, MPa - 800 | 15% |
UNS S31803 Duplex Steel Seamless Pipes Size Chart
| Wall | Sizes ( O.D.) |
|---|---|
| .010 | 1/16" , 1/8" , 3/16" |
| .020 | 1/16" , 1/8" , 3/16" , 1/4" , 5/16" , 3/8" |
| .012 | 1/8" |
| .016 | 1/8" , 3/16" |
| .028 | 1/8" , 3/16" , 1/4" , 5/16" , 3/8" , 1/2" , 3/4" , 1" , 1 1/2" , 2" |
| .035 | 1/8" , 3/16" , 1/4" , 5/16" , 3/8" , 7/16" , 1/2" , 16" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 1 5/8" , 2" , 2 1/4" |
| .049 | 3/16" , 1/4" , 5/16" , 3/8" , 1/2" , 16" , 5/8" , 3/4" , 7/8" , 1" , 1 1/8" , 1 1/4" , 1 1/2" , 1 5/8" , 2" , 2 1/4" |
| .065 | 1/4" , 5/16" , 3/8" , 1/2" , 16" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 1 5/8" , 1 3/4" , 2" , 2 1/2" , 3" |
| .083 | 1/4" , 3/8" , 1/2" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 1 5/8" , 1 7/8" , 2" , 2 1/2" ,3" |
| .095 | 1/2" , 5/8" , 1" , 1 1/4" , 1 1/2" , 2" |
| .109 | 1/2" , 3/4" , 1" , 1 1/4" , 1 1/2" , 2" |
| .120 | 1/2" , 5/8" , 3/4" , 7/8" , 1" , 1 1/4" , 1 1/2" , 2" , 2 1/4" , 2 1/2" , 3" |
| .125 | 3/4" , 1" , 1 1/4" , 1 1/2" , 2" , 3" , 3 1/4" |
| .134 | 1" |
| .250 | 3" |
| .375 | 3 1/2" |
Duplex Steel UNS S31803 Seamless Pipes Pressure Rating
Following is the pressure ratings of UNS S31803 pipe, reflecting working pressure of pipe at different wall thickness.
| Tube O.D. (in.) |
Wall Thickness of Tubes (inches) | |||||||
|---|---|---|---|---|---|---|---|---|
| .028 | .035 | .049 | .065 | .083 | .095 | .109 | .120 | |
| Working Pressure (psig) | ||||||||
| 1/8 | 7900 | 10100 | ||||||
| 1/4 | 3700 | 4800 | 7000 | 9500 | ||||
| 5/16 | 3700 | 5400 | 7300 | |||||
| 3/8 | 3100 | 4400 | 6100 | |||||
| 1/2 | 2300 | 3200 | 4400 | |||||
| 3/4 | 2200 | 3000 | 4000 | 4600 | ||||
| 1 | 2200 | 2900 | 3400 | 3900 | 4300 | |||
Duplex Steel S31803 Seamless Pipes Manufacturing Process
Following are the 5 steps involved in the duplex steel S31803 seamless pipe manufacturing process to achieve high-quality output.
1. Raw Material Selection
High-quality 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 and 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 of Duplex Stainless Steel S31803 Seamless Pipes
Duplex Steel UNS S31803 seamless pipes are primarily used in the oil and gas industry for offshore and onshore pipeline systems. These pipes are extensively utilized in subsea flowlines, risers, and topside process piping. They are also used in chemical processing plants, desalination units, and marine environments where exposure to corrosive media is significant.
Oil and Gas Industry
Marine Applications
Chemical Industry
Petrochemical Industry
Power Plants
Aerospace & Defense
Automotive and Transportation
Desalination Plants
Pulp and Paper Industry
Duplex S31803 Seamless Pipes
FAQ's
What are Duplex Steel UNS S31803 Seamless Pipes used for?
What are Duplex Steel UNS S31803 Seamless Pipes used for?
Duplex Steel UNS S31803 seamless pipes are essential for demanding environments across industries like oil and gas, chemical processing, and desalination, leveraging their superior high strength and excellent chloride-induced corrosion resistance. These pipes are mostly used in critical infrastructure such as pipelines, pressure vessels, and heat exchangers in applications ranging from offshore exploration to power generation and pulp and paper manufacturing. Their reliability and safety in harsh conditions make them indispensable for transporting corrosive media and for various structural applications.
What makes Duplex Steel UNS S31803 Seamless Pipes better than stainless steel pipes?
What makes Duplex Steel UNS S31803 Seamless Pipes better than stainless steel pipes?
Duplex Steel UNS S31803 seamless pipes offer significant advantages over standard stainless steel, primarily due to their duplex microstructure, which delivers roughly twice the yield strength and vastly superior corrosion resistance, especially against pitting and stress corrosion cracking. This combination of higher strength and durability allows for the use of thinner walls, potentially leading to material cost savings and lower overall lifetime costs in demanding environments across oil and gas, chemical processing, and marine applications. Their high Pitting Resistance Equivalent Number (PREN) confirms their enhanced performance in aggressive media.
Can Thaida provide customized Duplex Steel UNS S31803 Seamless Pipes?
Can Thaida provide customized Duplex Steel UNS S31803 Seamless Pipes?
Yes, Thaida can provide customized Duplex Steel UNS S31803 Seamless Pipes to meet specific project requirements. The company offers flexibility in dimensions, wall thickness, length, and surface finish, ensuring each product meets precise industry standards. With advanced manufacturing capabilities and strict quality control, Thaida delivers reliable, high-performance pipes tailored for demanding industrial applications.
What industries commonly use Duplex Steel UNS S31803 Seamless Pipes?
What industries commonly use Duplex Steel UNS S31803 Seamless Pipes?
Duplex Steel UNS S31803 seamless pipes are widely used in industries such as oil and gas, chemical processing, power generation, and marine engineering for their exceptional strength and corrosion resistance. They are also utilized in sectors like water treatment, desalination, and pulp and paper manufacturing, where durability and reliability in harsh environments are essential.
What material is uns S31803?
What material is uns S31803?
UNS S31803, also known as Duplex 2205, is a duplex stainless steel recognized for its exceptional strength and corrosion resistance. Its two-phase microstructure of austenite and ferrite provides outstanding resistance to pitting, crevice corrosion, and chloride stress corrosion cracking. This durable and versatile material is commonly used for manufacturing components such as pipes, tubes, and various structural elements requiring high performance in demanding environments.
What is the difference between uns S31803 and 316?
What is the difference between uns S31803 and 316?
Duplex Stainless Steel UNS S31803 outperforms Austenitic Stainless Steel SS316 owing to its duplex microstructure, which offers nearly twice the yield strength and superior corrosion resistance. Although SS316 is often chosen for applications involving extreme temperatures below −50°C or above 250°C, S31803 provides an ideal balance of strength, resistance to stress corrosion cracking, and cost efficiency, making it highly suitable for demanding operational conditions.
What is the difference between S32760 and S31803?
What is the difference between S32760 and S31803?
Both S31803 and S32760 are duplex stainless steels featuring a balanced austenitic-ferritic microstructure, combining the strength of ferritic steels with the corrosion resistance of austenitic grades. While both offer an excellent mix of mechanical properties and corrosion resistance at a competitive cost, S32760 is more highly alloyed, containing about 25% chromium compared to 22% in S31803. This higher alloy content gives S32760 greater strength and enhanced corrosion resistance, particularly in more aggressive environments, making it the stronger and more durable option between the two.
What is S31803 material equivalent to?
What is S31803 material equivalent to?
S31803 material is equivalent to Duplex 2205 stainless steel, a widely used duplex grade known for its balanced mechanical strength and corrosion resistance. It is designated under various international standards, including UNS S31803, EN 1.4462, ASTM A182 F51, A240, and A790. Other equivalents include AFNOR Z3CND22-05AZ, JIS SUS329J3L, SS 2377, and BS 318S13, all referring to the same versatile duplex stainless steel grade.