High-Performance Super Duplex Pipes by TOBO | ASME Standards

High-Performance Super Duplex Pipes by TOBO | ASME Standards

Product Introduction

Overview
TOBO’s Super Duplex Stainless Steel Pipes represent the pinnacle of performance for demanding industrial applications. Manufactured under strict ASME quality standards, these pipes combine a unique metallurgical structure of approximately 50% ferrite and 50% austenite. This grants them exceptional strength—yield strength is more than double that of standard austenitic stainless steels—alongside superior toughness and outstanding resistance to a wide range of corrosive threats, particularly chloride-induced stress corrosion cracking. Designed to withstand the harshest conditions in offshore, chemical, and energy sectors, they provide a reliable, long-lasting, and cost-effective piping solution.

1. Product Description
TOBO’s Super Duplex Stainless Steel Pipes are high-alloy steel products primarily composed of chromium, nickel, molybdenum, and nitrogen. The “Super Duplex” designation indicates a premium grade within the duplex family, characterized by even higher chromium and molybdenum content, which delivers enhanced corrosion resistance compared to standard duplex grades like 2205. Our product range includes both seamless and welded pipes, produced to meet precise dimensional and metallurgical specifications for critical service.

2. Key Specifications

• Key Material Standard: ASTM A790 / A928 UNS S32750 (2507).

• Size Range: Outer diameters from 1/2 inch to 16 inches (and larger available), catering to various system scales.

• Wall Thickness: Covers schedule SCH40S through XXS, providing options for different pressure requirements.

• Manufacturing & Design Standards: Conforms to ASME B36.10M / ASME B36.19M for dimensional standards and ASME B16.9 for fittings.

• Temperature Range: Suitable for operating temperatures from -50°C to 250°C.

3. Application
These pipes are engineered for severe service environments where failure is not an option. Key application areas include:

• Oil, Gas & Offshore: Subsea pipelines, process piping, topside tubing, and umbilical cables for hydrocarbon transport.

• Chemical & Petrochemical: Handling aggressive media like acids, chlorides, and other corrosive process streams.

• Seawater & Desalination: Intake and discharge lines, reverse osmosis (RO) high-pressure piping, and cooling systems.

• Pollution Control: Flue Gas Desulfurization (FGD) systems and other high-chloride effluent treatments.

• Pulp & Paper and Marine: Equipment exposed to corrosive and erosive conditions.

4. Key Advantages
Choosing TOBO Super Duplex Pipes offers significant engineering and economic benefits:

• Exceptional Strength-to-Weight Ratio: Their high yield strength allows for reduced wall thickness (by 30-50%) compared to conventional austenitic stainless steels, leading to material savings and easier installation.

• Superior Corrosion Resistance: Provides excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in chloride-rich environments, ensuring long service life.

• Good Weldability & Fabricability: With proper procedures, they offer reliable weld joints and are suitable for complex fabrication needs.

• Thermal Expansion Similar to Carbon Steel: This property minimizes thermal stress issues when connecting to carbon steel systems, simplifying design.

5. Function
The core function of TOBO Super Duplex Pipes is to provide a safe, durable, and maintenance-efficient conduit for transporting highly corrosive, abrasive, or high-pressure fluids. They are designed to maintain structural integrity under extreme static and dynamic loads, prevent costly leaks or failures in critical infrastructure, and ultimately reduce the total cost of ownership through extended lifecycle performance and reduced downtime.

Payment & Invoicing

1. First-Time Clients: 50% advance payment, 50% balance before shipment.
2. Strategic Clients: 30% advance, 70% payment against copy of Bill of Lading.
3. Long-Term Agreements: 60-day credit terms available (subject to credit approval).
4. Invoicing: 13% VAT Special Invoice provided; FORM A Certificate of Origin for exports.
5. 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.