Corrosion Defense: Super Duplex Pipes by TOBO | ASME Standards

Corrosion Defense: Super Duplex Pipes by TOBO | ASME Standards

TOBO delivers a superior grade of Super Duplex Stainless Steel Pipes, specifically engineered to meet the exacting demands of modern heavy industry. Certified to stringent ASME standards, these pipes offer an exceptional balance of high strength and outstanding corrosion resistance, making them a fundamental component for safety and reliability in critical applications. Their unique duplex microstructure provides over double the yield strength of conventional 304/316 stainless steel, coupled with superior resistance to stress corrosion cracking. This robust performance profile ensures long-term durability and operational integrity in the most aggressive environments, from deep-sea oil fields to high-chloride chemical processing plants.

1. Product Description
Our Super Duplex Stainless Steel Pipes are high-performance tubular products, predominantly made from UNS S32750 (2507) alloy. This advanced material features a carefully controlled microstructure of roughly equal parts ferrite and austenite phases, enhanced with high levels of chromium, molybdenum, and nitrogen. TOBO offers these pipes in both seamless and welded forms, finished to precise dimensional tolerances and surface qualities to ensure optimal performance and ease of installation in complex piping systems.

2. Key Specifications

• Primary Material Standard: Compliant with ASTM A790/A790M for UNS S32750.

• Key Dimensional Standard: Manufactured to ASME B36.19M specifications for stainless steel pipe dimensions.

• Standard Size Offering: Available in Nominal Pipe Sizes (NPS) from 1/2" to 12", with other sizes available upon request.

• Wall Thickness: Supplied in standard schedules including SCH 10S, 40S, 80S, and 160S.

• Certification: Pipes are supplied with a certified Material Test Report (MTR) verifying compliance to ASME and ASTM specifications.

3. Application
TOBO Super Duplex Pipes are the material of choice for engineering teams facing extreme operational challenges:

• Oil & Gas Production: Ideal for downhole tubing, manifolds, and flowlines handling sour gas (H2S/CO2) and chlorides.

• Chemical Transport: Safely conveys concentrated acids, alkalis, and solvents in pharmaceutical and specialty chemical plants.

• Power Generation: Used in offshore platform cooling systems, FGD scrubber linings, and high-temperature water systems.

• Marine Engineering: Essential for shipboard piping systems, ballast water lines, and offshore platform structural components.

• Pulp & Paper Industry: Resists corrosion in digester, bleach plant, and chemical recovery areas.

4. Key Advantages

• Unmatched Strength-Durability Balance: Provides the strength of carbon steel with the corrosion resistance of high-grade stainless, enabling safer, lighter designs.

• Cost-Effective Lifecycle: Exceptional longevity and reduced maintenance frequency lead to significant savings over the total lifespan of an installation.

• Proven Reliability: Extensive global track record in critical services ensures confidence in material performance.

• Wide Operational Window: Maintains mechanical properties and corrosion resistance across a broad temperature range, offering design flexibility.

• Global Standard Compliance: ASME certification ensures worldwide acceptance and simplifies procurement for international projects.

5. Function
The fundamental role of TOBO Super Duplex Pipes is to provide a fail-safe, long-life conduit system under punishing conditions. They are designed to withstand simultaneous mechanical, thermal, and chemical stresses without degradation, thereby ensuring uninterrupted process flow, protecting expensive downstream equipment, and preventing safety or environmental hazards. Their performance directly contributes to maximizing uptime and minimizing the total cost of complex industrial operations.