Engineered for Extreme Environments: TOBO Super Duplex Steel Pipes (ASTM A790 / DIN 1.4517)

TOBO's Super Duplex Stainless Steel Pipes represent the pinnacle of modern metallurgical engineering, designed to thrive where ordinary materials fail. By expertly balancing a duplex microstructure of austenite and ferrite, these pipes deliver an exceptional combination of supreme strength and outstanding corrosion resistance, particularly against chloride-induced stress corrosion cracking. Manufactured by TOBO with precision and rigorous quality control, our pipes are the reliable backbone for critical infrastructure across the globe, ensuring longevity, safety, and performance in the most aggressive operational environments.

1. Product Description
   TOBO Super Duplex Stainless Steel Pipes are seamless or welded pipes crafted from grades like UNS S32750. This advanced material offers a dual-phase microstructure, providing a remarkable synergy between the beneficial properties of its constituent phases. The result is a product that excels in mechanical robustness and resilience against a wide spectrum of corrosive media, making it a premium choice for engineering challenges.

2. Key Parameters
   Our pipes conform to leading international standards including ASTM A790 (ASME SA790) and German standard DIN EN 10216-5 for material 1.4517 (equivalent to UNS S32750). Key mechanical parameters typically include a minimum tensile strength of 800 MPa, a minimum yield strength of 550 MPa, and excellent impact toughness. They are available in a comprehensive range of sizes, schedules (wall thicknesses), and can be supplied with customized ends to meet specific project specifications.

3. Product Applications
   These high-performance pipes are indispensable in industries where failure is not an option. Primary applications include offshore and subsea oil & gas systems, chemical and petrochemical processing plants, seawater desalination units, pollution control and flue gas cleaning systems, and marine applications. They are ideal for handling chloride-containing fluids, acidic solutions, and other aggressive process media.

4. Product Advantages
   The foremost advantage lies in its exceptional pitting and crevice corrosion resistance, quantified by a high PREN (Pitting Resistance Equivalent Number) exceeding 40. It offers nearly double the yield strength of standard austenitic stainless steels (e.g., 316L), allowing for reduced wall thickness and potential weight savings. Furthermore, it provides excellent resistance to stress corrosion cracking, ensuring structural integrity under high stress in corrosive environments.

5. Product Functionality
   The core function of TOBO's Super Duplex Pipes is to ensure safe, reliable, and long-term conveyance of highly corrosive and high-pressure fluids. They are engineered to maintain integrity under severe thermal and mechanical stress, minimizing downtime, maintenance costs, and risk of catastrophic failure. This translates to enhanced operational safety, reduced total cost of ownership, and improved efficiency for demanding industrial processes.

   Payment & Invoicing

• First-Time Clients: 50% advance payment, 50% balance before shipment.
• Strategic Clients: 30% advance, 70% payment against copy of Bill of Lading.
• Long-Term Agreements: 60-day credit terms available (subject to credit approval).
• Invoicing: 13% VAT Special Invoice provided; FORM A Certificate of Origin for exports.
• fication System: Laser marking includes material code, pressure rating, and flow direction arrows.

FAQ

1. Are you trading company or manufacturer ?
We are manufacturer ,You can see the Alibaba certification.
2. How long is your delivery time?
Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
3. Do you provide samples ? is it free or extra ?
Yes, we could offer the sample for free charge but need pay the cost of freight.
4. What is your terms of payment ?
Payment<=1000USD, 100% in advance. Payment>=1000USD, 50% T/T in advance ,balance before shippment