Duplex Steel S31803 Pipe

Duplex Steel S31803 Pipe Manufacturer | Global Bulk Supplier for Oil & Gas Infrastructure

As a trusted partner for industrial projects worldwide, Xi’An QinSteel Trading Co., Ltd specializes in delivering high-performance Duplex Steel S31803 Pipe solutions engineered for extreme environments. Our ASTM/ASME-compliant pipes combine unmatched corrosion resistance with mechanical durability, making them ideal for offshore platforms, subsea pipelines, and refinery systems. With same-day shipping from our 10,000+ MT inventory, we ensure your projects stay on schedule.

What Makes Our Duplex Steel S31803 Pipe Stand Out?

The product offers a unique dual-phase microstructure (50% austenite, 50% ferrite) that outperforms traditional stainless steels. Key benefits include:

• 2x Higher Yield Strength: Reduce material costs while maintaining structural integrity under high-pressure conditions.
• Superior Chloride Resistance: Withstand stress corrosion cracking in seawater, brine, and acidic media.
• Versatile Manufacturing: Choose between seamless (for critical services) or welded (cost-efficient) constructions.
• Global Compliance: Meets ASTM A790, ASME SA790, NACE MR0175, and ISO 15156 standards.

Technical Specifications at a Glance

Engineered for Harsh Environments

Material Excellence

• Chemical Composition: 22% Chromium, 5% Nickel, 3% Molybdenum, 0.03% Carbon.
• Mechanical Properties: Tensile Strength ≥795 MPa | Yield Strength ≥550 MPa | PREN ≥40.
• Certifications: ISO 9001, PED, NACE MR0175, and API 5LC.

Applications

• Offshore: Seawater cooling systems, hydraulic lines.
• Oil & Gas: Sour gas pipelines, heat exchangers.
• Chemical Processing: Reactors, condensers.
• Subsea: Umbilicals, flowlines.

Why Partner With Us?

1️⃣ R&D Expertise

Our engineering team optimizes Duplex Steel S31803 Pipe phase balance and corrosion resistance through advanced heat treatment processes.

2️⃣ Rapid Fulfillment

5,000+ tons of ready-to-ship S31803 pipes with same-day dispatch for urgent orders.

3️⃣ End-to-End Testing

Every batch undergoes PMI, hydrostatic, and ultrasonic testing—full traceability with mill test reports.

4️⃣ Custom Solutions

Tailor dimensions, thicknesses, or surface finishes via our OEM/ODM services.

5️⃣ Secure Logistics

Pipes are VCI-coated, crated in reinforced wooden boxes, and shipped via DHL/FedEx or sea freight.

Quality Control

Factory Equipment

Shipping Packaging

FAQs: Your Questions, Answered

Q: Can you provide NACE MR0175-certified pipes for sour gas applications?

A: Absolutely. All our products meet NACE standards for hydrogen sulfide environments.

Q: What’s the lead time for custom sizes not in stock?

A: Non-stock sizes typically ship within 15–20 days after order confirmation.

Q: Do you offer technical support for welding procedures?

A: Yes! We provide welding parameter guidelines to ensure optimal joint integrity.

Q: How do you prevent corrosion during shipping?

A: We use VCI anti-corrosion film and desiccant packs for long-term protection.

Q: Can I request a sample before bulk ordering?

A: Of course. Contact us to arrange sample delivery with testing documentation.

Contact Us

📧 Email: info@sxqinsteel.com

Boost your project’s reliability with Xi’An QinSteel’s certified Duplex Steel S31803 Pipe—where innovation meets industrial resilience.