Mastering Corrosion: ASME-Certified Super Duplex Pipes by TOBO

Mastering Corrosion: ASME-Certified Super Duplex Pipes by TOBO

Product Introduction

Overview
TOBO presents its advanced line of Super Duplex Stainless Steel Pipes, engineered to deliver unparalleled reliability in the world's most challenging industrial environments. Conforming to rigorous ASME standards, these pipes leverage a balanced microstructure of austenite and ferrite to achieve a remarkable synergy of properties. They offer exceptional mechanical strength—surpassing standard stainless steels—and superior resistance to pitting, crevice, and stress corrosion cracking, particularly in chloride-laden settings. This makes them an optimal, long-term solution for high-pressure, high-corrosion applications across critical industries, ensuring safety, durability, and operational efficiency.

1. Product Description
TOBO Super Duplex Stainless Steel Pipes are premium-grade tubular products crafted from a high-alloy composition rich in chromium, nickel, molybdenum, and nitrogen. Designated under material grade UNS S32750 (2507), they represent the top tier of the duplex steel family. Our portfolio encompasses both seamless and longitudinally welded manufacturing processes, available in a comprehensive range of sizes and schedules to fulfill diverse project specifications and design requirements for demanding service conditions.

2. Key Specifications

• Material Standard: Manufactured in accordance with ASTM A790/A790M and ASTM A928/A928M for UNS S32750.

• Dimensional Standards: Compliant with ASME B36.19M (Stainless Steel Pipe) and ASME B36.10M (Welded and Seamless Wrought Steel Pipe).

• Common Size Ranges: Outer Diameter (OD) from ½" NPS to 24" NPS, with wall thicknesses covering Schedule 10S to Schedule XXS.

• Pressure Ratings: Designed to meet specified pressure classes as per system design requirements under ASME B31.3.

• Temperature Capability: Recommended for continuous service within a range of -50°C (-58°F) to 300°C (572°F).

3. Application
These pipes are specifically selected for aggressive and mission-critical services:

• Offshore Oil & Gas: Subsea flow lines, risers, process piping, and cooling systems handling seawater and hydrocarbons.

• Chemical Processing: Transport of highly acidic, caustic, or chloride-containing process streams in reactors and heat exchangers.

• Desalination & Water Treatment: High-pressure RO membranes, brine lines, seawater intake, and discharge piping.

• Pollution Control: Ducting and piping in Flue Gas Desulfurization (FGD) units exposed to wet, chloride-rich environments.

• Marine & Shipbuilding: For systems requiring high strength and seawater corrosion resistance.

4. Key Advantages

• High Strength & Weight Savings: Possesses over double the yield strength of standard 300-series austenitic steels, enabling thinner walls, reduced weight, and potential cost savings on supports and installation.

• Outstanding Corrosion Resistance: High PREN (Pitting Resistance Equivalent Number) above 40 ensures robust performance in severe environments, minimizing failure risk and maintenance.

• Favorable Fabrication Properties: Exhibits good weldability and formability with appropriate procedures, facilitating project execution.

• Excellent Erosion & Abrasion Resistance: The inherent toughness provides durability in services with high fluid velocities or solid particles.

• Life Cycle Cost Efficiency: The combination of longevity, reduced maintenance, and reliability offers a lower total cost of ownership compared to alternatives.

5. Function
The primary function of TOBO Super Duplex Pipes is to serve as a high-integrity pressure boundary for conveying aggressive, hazardous, or high-value fluids. They are designed to maintain containment and flow efficiency under extreme operational stresses—including high pressure, cyclic loading, and thermal fluctuations—thereby safeguarding assets, preventing environmental incidents, and ensuring continuous, safe process operations in critical infrastructure worldwide.

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.