s32750 super duplex stainless pipe
2. Standard: ASTM A790, ASME SA790, engineered for critical central-station and severe corrosive pressure piping
3. Process: Heavy seamless hot extrusion or automated straight-seam welding tailored to extreme operational pressures
4. Size Range: Nominal Pipe Size (NPS) 1/8" to 48", wall thicknesses precisely calibrated from Sch 10S to heavy XXS
5. Heat Treatment: Strict furnace solution annealing above 1040°C followed by rapid forced uniform water quenching
6. Surface Finish: Thoroughly descaled, uniform solution annealed and pickled (SA&P), or industrial sandblasted matte
7. Application: Deep-sea oil extraction risers, high-salinity desalination systems, marine scrubbers, and severe chemical processing
8. Service Advantage: Sourced from premium high-alloy billets, ASTM A923 corrosion verified, 100% UT and PMI checking
9. Packaging: Secure sea-freight packing with heavy iron framing, reinforced steel cradles, or end-capped individually
10. Key Advantage: Premium PREN ≥ 42, delivering unparalleled structural resistance against severe pitting and stress cracking
S32750 Super Duplex Stainless Pipe – Premium Corrosion-Resistant Solutions for Extreme Industrial Applications
Hebei All Trust Steel Co., Ltd manufactures high-performance s32750 super duplex stainless pipe engineered specifically for the most demanding corrosive environments. Our super duplex pipe is manufactured to ASTM A790 and ASME SA790 standards, with a Pitting Resistance Equivalence Number (PREN) greater than 42 to provide superior protection against localised pitting and stress corrosion cracking. We produce over 15,000 tons annually and each pipe is 100% hydraulically tested. Our precision-engineered products may be used on offshore oil platforms, desalination facilities and harsh chemical processing systems. Our super duplex pipes are manufactured with regulated dual phase microstructure and complete material traceability with EN 10204 3.1/3.2 Mill Test Certificates.
What Makes s32750 super duplex stainless pipe
S32750 is the peak of duplex stainless steel technology. This grade has a high amount of chromium (24-26%), nickel (6-8%) and molybdenum (3-5%) and is accurately nitrogen-enhanced. The result is a material with double the yield strength of normal austenitic stainless steel, yet with excellent toughness.
Your projects need dependability in chloride-rich environments. The ferritic-austenitic balancing microstructure gives excellent resistance to chloride-induced stress corrosion cracking and this is a key benefit in marine and offshore applications. This metallurgical balance gives the pipe the ability to operate at greater pressures than ordinary grades.
All product length from our plant is subject to intensive solution annealing at over 1040°C, and fast water quenching. This heat treatment provides the perfect phase balance and maximum corrosion resistance throughout the whole cross section.
Technical Specifications
| Parameter | Specification |
|---|---|
| Material Grade | S32750 (UNS S32750 / Super Duplex 2507 / 1.4410) |
| Manufacturing Standards | ASTM A790, ASME SA790, ASTM A928, EN 10216-5, EN 10217-7 |
| Process Type | Hot Finished Seamless / Cold Finished / TIG Welded |
| Outer Diameter Range | 1/4" – 24" (13.7 mm – 609.6 mm) |
| Wall Thickness | SCH 10S, SCH 40S, SCH 80S, SCH 160, SCH XXS (2.0 mm – 40.0 mm) |
| Standard Length | 5.8 m / 6 m / 11.8 m / 12 m / Custom Cut |
| Surface Finish | Solution Annealed & Pickled (SA&P) / Bright Annealed (BA) |
| End Configuration | Plain End (PE) / Beveled End (BE) per ASME B16.25 |
| PREN Value | ≥ 40 (Guaranteed) |
| Ferrite Content | 40–60% (Balanced Dual-Phase) |
| Testing Methods | 100% UT, Eddy Current, Hydrostatic, PMI, ASTM G48 Corrosion Test |
| Certifications | EN 10204 3.1/3.2 MTC, ISO 9001:2015, PED, NORSOK M-650 |
| Third-Party Inspection | SGS, BV, TÜV, DNV, ABS, Lloyd's (Available) |
Superior Performance in Harsh Environments
Pipeline failure cannot be afforded in your operations. The product is superior than traditional materials that fail due to corrosion.
PREN > 42: This grade exhibits excellent resistance to pitting and crevice corrosion in high-chloride saltwater at higher temperatures. Extended service life and lower-cost replacements are beneficial to offshore platforms and subsea pipelines.
Double the Strength The dual-phase microstructure results in yield strength about twice that of 316L stainless steel. You can make thinner walls , thereby decreasing material costs , yet still have structural integrity under high pressure circumstances .
Stress Corrosion Cracking Immunity: Super duplex steel is resistant to chloride stress corrosion cracking, unlike austenitic grades. Your heat exchangers, desalination systems and chemical reactors work safely, with no chance of unexpected, catastrophic failure.
Temperature Versatility: This material is effective throughout a wide temperature range from cryogenic to 300°C. This makes it appropriate for a variety of industrial applications such as LNG facilities and pulp bleaching.
Precision Manufacturing and Quality Assurance
We source premium high-alloy billets exclusively from ISO-certified mills for s32750 super duplex stainless pipe. Each heat undergoes spectrographic analysis to verify precise chemistry within tight ASTM tolerances.
Our manufacturing process includes:
Advanced Forming Technology: Hot extrusion for seamless pipes ensures uniform wall thickness and grain structure. Welded versions utilize automated TIG processes with mandatory 100% radiographic inspection of every weld seam.
Mandatory Heat Treatment: Every pipe receives solution annealing in controlled-atmosphere furnaces followed by rapid water quenching. This critical step prevents harmful intermetallic precipitation and optimizes the ferrite-austenite balance.
Comprehensive Testing Protocol: Beyond standard dimensional checks, we perform ASTM G48 Method A ferric chloride pitting tests, ferrite content verification using calibrated ferrite scopes, and full-length ultrasonic examination. Positive Material Identification (PMI) confirms grade authenticity for every production lot.
Zero-Defect Philosophy: Our hydraulic testing at pressures exceeding operating requirements is 100%, guaranteeing leak-proof operation. Our quality certification is given only to pipes that have passed all mechanical, chemical and non-destructive testing.
Wide Range of Uses Across Industries
Offshore Oil & Gas Superior corrosion resistance in high salinity settings with H2S and CO2 present is advantageous for subsea umbilicals, platform piping systems and injection lines.
Desalination Plants: Reverse osmosis systems, brine discharge lines and heat recovery equipment have proven reliable in handling harsh saltwater and concentrated chloride solutions for decades.
Chemical Processing: Reactors, heat exchangers and transfer lines for acids, chlorides and other corrosive chemicals which must be able to withstand thermal cycling and corrosive assault.
Marine Engineering: Ballast systems, fire suppression networks, and scrubber pipes aboard boats need to use materials that can withstand continual saltwater exposure without maintenance.
Pulp & Paper Industry: Bleaching systems that use chlorine dioxide need materials that can withstand oxidising acids and corrosion from chlorides.
Customization Capabilities for Your Project
Standard dimensions don't always match project requirements. We offer extensive customization:
Dimensional Flexibility: Custom outer diameters up to 24 inches and wall thicknesses to SCH XXS accommodate unique pressure ratings and flow requirements.
Edge Preparation: Beveled ends machined to your specified angles facilitate field welding. We can provide compound bevels for thick-wall applications requiring multiple weld passes.
Length Precision: Cut to exact lengths matching your installation drawings, eliminating field cutting and reducing fabrication costs.
Surface Options: Choose from industrial pickled finish for painted systems or bright annealed for pharmaceutical and food-grade applications requiring enhanced cleanability.
Additional Processing: Threading, grooving, flanging, and bending services streamline your supply chain by delivering ready-to-install components.
Reliable Global Supply and Support
With over 5,000 tons of rolling inventory and partnerships with 15+ qualified mills, we maintain supply continuity even during market disruptions. Stock items ship within 3-5 days. Custom orders typically complete within 15-20 days.
Our technical team provides material selection guidance, corrosion analysis, and welding procedure recommendations. We assist with container loading optimization and supply all necessary documentation for customs clearance and project compliance.
Export packing is plastic end caps, protective sleeves and steel strapped hexagonal bundles and fumigation free hardwood boxes. Whether you are delivering to Houston, Rotterdam or Singapore, your goods arrives in pristine condition.
FAQ
Q：What special chemical ingredients make this product live in the harsh maritime environment?
A: The pipe has high amounts of chromium (24-26%), nickel (6-8%) and molybdenum (3-5%) for an outstanding Pitting Resistance Equivalence Number (PREN ≥ 42) to prevent localised pitting and crevice corrosion loops in harsh salt water circumstances.
Q：Why is a controlled dual-phase matrix critical for this super duplex piping asset under high pressures?
A: It is a 50/50 mixture of ferrite and austenite phases with exactness in the microstructure. It has double the yield strength of standard austenitic stainless steel and optimises the structural load-bearing capability for high-velocity flow dynamics and pressure surges.
Q：What stringent quality control metrics verify the metallurgical safety of this super duplex lot?
A：Every batch undergoes severe non-destructive validation combined with mandatory ferrite content count testing, Positive Material Identification (PMI), rigorous ferric chloride pitting corrosion diagnostic monitoring (ASTM G48 Method A), and complete chemical and mechanical property verification.
Q：Can this super duplex pipe series be customized with specialized edge configurations for thick-walled welding?
A：Yes, we support extensive custom fabrication options, offering precision compound bevel angles and groove geometries according to ASME B16.25 codes alongside bespoke high-thickness schedules up to SCH XXS for critical pressure service.
Q：What robust shipping protection is allocated to shield this s32750 super duplex lot during transit?
A：The pipes are secured into tight hexagonal bundles strapped with high-tensile steel bands, wrapped entirely inside heavy waterproof weaving material, and loaded into reinforced plywood frame cradles or fumigation-free wooden cases meeting international shipping standards.
Contact Us
Need assistance selecting the right specification for your project with the s32750 super duplex stainless pipe? Our engineering team is ready to help. Reach out to info@hballtrust.com for technical support, quotations, and delivery scheduling.
