TOBO Super Duplex Stainless Steel Pipe–Extreme Corrosion Resistance (ASTM A790 / 1.4517)

TOBO Super Duplex Stainless Steel Pipe–Extreme Corrosion Resistance (ASTM A790 / 1.4517)
 

Overview

TOBO's Super Duplex Stainless Steel Pipes stand as the top achievement of modern metallurgical technology, engineered to perform reliably where common materials cannot survive. Through a well-balanced duplex microstructure composed of austenite and ferrite, these pipes offer an outstanding combination of high strength and excellent corrosion resistance, especially against chloride-induced stress corrosion cracking. Produced by TOBO with strict precision and quality management, our pipes serve as a dependable foundation for critical infrastructure worldwide, guaranteeing long service life, safety and stable performance in the harshest working environments.

1. Product Description

TOBO Super Duplex Stainless Steel Pipes are provided in both seamless and welded types, manufactured from alloys including UNS S32750. This high-performance material possesses a two-phase microstructure that integrates the beneficial properties of both phases. As a result, the product excels in mechanical strength and resistance to a wide range of corrosive media, making it a premium solution for challenging engineering applications.

2. Key Parameters

Our products conform to major international standards, such as ASTM A790 (ASME SA790) and German standard DIN EN 10216‑5 for grade 1.4517 (equivalent to UNS S32750). Typical mechanical properties feature a minimum tensile strength of 800 MPa, a minimum yield strength of 550 MPa, and excellent impact toughness. We provide a complete range of sizes, schedules (wall thicknesses) and customizable end types to meet various project demands.

3. Product Applications

These high-performance pipes are indispensable for industries where operational stability is essential. Main applications include offshore and subsea oil & gas systems, chemical and petrochemical plants, seawater desalination facilities, environmental and flue gas treatment systems, and marine engineering. They are especially ideal for conveying chloride-bearing media, acidic liquids and other highly corrosive process fluids.

4. Product Advantages

The most significant advantage is their excellent resistance to pitting and crevice corrosion, supported by a high PREN (Pitting Resistance Equivalent Number) exceeding 40. They offer almost double the yield strength of traditional austenitic stainless steels like 316L, allowing thinner wall designs and possible weight savings. Furthermore, they present exceptional resistance to stress corrosion cracking, preserving structural stability under high stress in corrosive conditions.

5. Product Functionality

The main function of TOBO Super Duplex Pipes is to ensure safe, stable and long-distance delivery of highly corrosive and high-pressure fluids. Engineered to maintain structural integrity under extreme thermal and mechanical loads, they effectively cut down downtime, maintenance costs and the risk of unexpected failure. This results in better operational safety, lower overall lifecycle costs and higher efficiency for heavy-duty industrial operations.

• 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