Duplex Stainless Steel Tubes Manufacturer from China
- Expert duplex stainless steel tube manufacturing in China.
- Custom sizes, shapes, and finishes to meet project needs.
- Premium stainless steel materials meeting international standards.
- Comprehensive quality inspections on every batch.
- Efficient production enabling rapid delivery schedules.
One Stop Solution to Custom Duplex Stainless Steel Tube
Vulroc is a professional stainless steel tube manufacturer in China, offering one-stop solutions for Duplex Stainless Steel Tubes. We provide complete services including material selection, custom sizing, tube shaping, surface finishing, engineering guidance, quality inspection, and export packaging. With dedicated production lines, ample tube inventory, and an in-house welding and inspection team, we ensure stable production schedules, fast turnaround, and consistent product quality across all batches, helping clients meet demanding structural and industrial requirements.
With over 15 years of experience in stainless steel tube manufacturing, Vulroc has delivered thousands of tons of Duplex Stainless Steel Tubes to both domestic and international customers. Annual production exceeds 3,500 tons. Our tubes are widely applied in petrochemical plants, offshore platforms, power generation, HVAC systems, pressure vessels, and industrial pipelines, supporting both standard and custom engineering projects. By combining high-strength duplex alloys with precision processing and advanced surface treatments, we ensure durability, corrosion resistance, and long-term performance for critical applications.
Explore our Regular Duplex Stainless Steel Tube Styles
Vulroc offers a comprehensive range of Duplex Stainless Steel Tube styles, including Round Tubes, Square Tubes, Rectangular Tubes, and Coil/Spiral Tubes, supporting both standard and fully customized solutions. We work with high-quality duplex stainless steel alloys to ensure excellent corrosion resistance, mechanical strength, and durability across demanding industrial applications. Multiple processing and surface treatment options are available, such as pickling, passivation, polishing, annealing, end forming, precision cutting, and coiling, allowing our tubes to meet specific project requirements in sectors like petrochemical, energy, marine, HVAC, and construction.
Vulroc Duplex Stainless Steel Tube Features
We can produce according to customers’ requirements to ensure 100% customer satisfaction.
Tailored Corrosion Resistance
Manufactured from duplex stainless steel (2205, 2507), our tubes combine high chromium and molybdenum content to resist chloride stress corrosion, ideal for marine, chemical, and offshore applications.
High Strength & Durability
Exceptional yield and tensile strength reduce wall thickness requirements while maintaining structural integrity, supporting demanding pressure systems and load-bearing installations.
Precision Fabrication
Available in welded, seamless, or cold-drawn forms with precise dimensional tolerances. Custom end types, cutting, bending, and coiling services ensure seamless integration into complex assemblies.
Surface Finishing & Treatments
Pickled, passivated, or polished surfaces enhance corrosion protection and surface quality. Additional processing like end forming, threading, or annealing is offered to meet project-specific needs.
Reliable Quality & Fast Turnaround
Every tube undergoes chemical composition verification, non-destructive testing (UT/ET), and hydrostatic pressure tests. Continuous stock and dedicated production lines allow rapid delivery for critical engineering projects.
Duplex Stainless Steel Tube Customization Specification
- At Vulroc, we customize duplex stainless steel tubes to match your exact operating conditions and material needs. From high-pressure use to marine corrosion environments and special alloy options, we deliver precise, performance-focused duplex stainless steel tube solutions.
Choose the Customized Duplex Stainless Steel Tube Sizes
We produce your duplex stainless steel tube in the exact size you need within the following ranges:
Size Parameter | Sizes |
Outer Diameter (OD) | 6 mm to 610 mm |
Inner Diameter (ID) | 3 mm to 580 mm |
Wall Thickness (WT) | 1 mm to 50 mm |
Pipe Schedule | SCH10 / SCH20 / SCH40 / SCH80 / SCH160 / XXS |
Length | 1 m to 12 m (Supports fixed-length and multi-length supply options) |
Dimensional Standards | ASTM A789 / ASTM A790 / ASME B36.19M / B36.10M |
All tubes can be produced according to drawings, industry standards, or special sizes upon request.
Choose the Customized Duplex Stainless Steel Tube Shape
Vulroc offers a comprehensive range of customizable tube shapes tailored for high-strength, corrosion-resistant applications across oil & gas, chemical processing, desalination, and structural systems.
Vulroc provides multiple Duplex Stainless Steel tube shape options, including:
- Round Tube
- Square Tube
- Rectangular Tube
- Flat Oval Tube
- Elliptical Tube
- Hexagonal Tube
- Coil Tube Form
- Engineered profiles based on customer drawings
All shapes can be produced according to ASTM, EN, or project-specific standards to ensure performance under high pressure, corrosive media, and demanding mechanical loads.
Vulroc supports custom cut lengths, long straight lengths, and coil configurations to match your installation, welding, and equipment integration requirements.
Choose the Customized Duplex Stainless Steel Tube Material
Vulroc offers a full range of duplex and super-duplex stainless steel grades to meet demanding mechanical, corrosion, and temperature requirements across petrochemical, offshore, marine, chemical processing, and high-pressure fluid systems.
Vulroc provides multiple Duplex Stainless Steel material options, including:
- Duplex 2205 (UNS S32205/S31803) – Excellent strength and chloride-stress corrosion resistance
- Super Duplex 2507 (UNS S32750) – Superior pitting, crevice, and seawater corrosion resistance
- Lean Duplex Grades (e.g., 2101, 2304) – Cost-effective strength for structural and moderate-corrosion applications
- Super Duplex S32760 / S32550 – High mechanical performance for aggressive chemical and offshore environments
- Other engineered duplex alloys according to project specifications
All materials can be manufactured according to ASTM, EN, ASME, NORSOK, or customer-specified standards, ensuring reliable strength, dimensional consistency, and long-term durability under high pressure, corrosive media, and fluctuating temperatures.
Choose the Customized Duplex Stainless Steel Tube Surface Finishing
Finishing types for Duplex Stainless Steel tubes are designed to meet demanding industrial, offshore, and high-performance applications.
- Pickling & Passivation: Removes scale and welding oxide while enhancing corrosion resistance for petrochemical, offshore, and pressure piping.
- Mechanical Polishing / Grind Polishing: Suitable for architectural components, exposed piping, food equipment, and high-cleanliness systems.
- Electropolishing: Ideal for high-purity applications, pharmaceutical systems, and clean pipelines.
- Bead / Shot Blasting: Provides surface uniformity and anti-fatigue treatment for structural and industrial frameworks.
- Anti-Corrosion Coating: Protects offshore platforms, marine pipelines, and splash zone areas.
- Oil Coating (Anti-Rust Protection): Temporary corrosion protection during shipping and storage.
- Heat Treatment (Solution Annealing): Improves toughness and restores corrosion resistance after fabrication.
- Custom Surface Processing: Tailored solutions for project-specific requirements such as matte finish, roughness control (Ra), or color marking.
Choose the Customized Duplex Stainless Steel Tube End Types
Vulroc provides a full range of precision-engineered end type options designed to match the demanding requirements of duplex stainless steel applications. Our end processing capabilities ensure secure installation, reliable sealing, and long-term performance in pipelines, pressure systems, offshore structures, and corrosion-critical environments.
Vulroc offers several end type options for duplex stainless steel tubes, including:
- Plain End (PE) for general fabrication, cutting, and mechanical assembly
- Beveled End (BE) for high-strength welding and pipe joining
- Threaded End for fittings, couplings, and field-installation systems
- Flared End for leak-tight connections in fluid, chemical, and high-pressure lines
- Swaged / Reduced End for tube-to-tube transitions and hydraulic assemblies
- Capped End for clean protection during shipping, storage, and on-site handling
- Custom End Machining based on drawings, tolerances, and project specifications
All end types can be produced according to the required wall thickness, OD, and grade of duplex stainless steel, ensuring reliable fit-up, corrosion resistance, and durability in harsh industrial conditions.
Tolerance Parameter | Typical Range / Standard Capability | Notes |
Outer Diameter (OD) Tolerance | ±0.2 mm to ±0.5 mm | Depends on OD range & production method (cold-drawn is tighter). |
Wall Thickness (WT) Tolerance | ±8% to ±12% (cold-drawn), ±10% to ±15% (cold-rolled) | Cold-drawn tubes offer higher precision. |
Length Tolerance | ±3 mm to ±5 mm | Precision cutting available for OEM orders. |
Straightness | ≤1.5 mm per meter | Important for long tubes used in high-pressure systems. |
Ovality | ≤50% of OD tolerance | Controlled to ensure proper sealing and welding. |
Concentricity | ≤0.5%–1.5% | Based on OD/WT ratio; affects flow performance. |
Surface Roughness (Ra) | Ra ≤ 1.6–3.2 μm | Depending on finish (pickled, polished, BA). |
End Squareness | ≤1.0 mm deviation | Ensures smooth installation and welding. |
End Bevel Tolerance (BE) | 30° ± 2° / 37.5° ± 2° | For standard welding prep requirements. |
Weight Tolerance | ±8% | Follows standard metal tube weight tolerance. |
Weld Seam Alignment (welded tubes) | ≤10% of wall thickness | Ensures uniform strength across the weld. |
Hydrostatic Pressure Test | Per ASTM / EN standards | Pressure level customizable by application. |
All-in-one Solution to Custom Duplex Stainless Steel Tube
Low MOQ
Ideal for projects of all sizes, our flexible minimum order quantities let you start small without compromising specifications.
Fast Sampling
Get accurate pre-production samples quickly to verify dimensions, wall thickness, and performance before full-scale manufacturing.
Endless Specifications
Customize outer diameter, wall thickness, length, and surface finish to meet the exact requirements of construction, industrial, and engineering applications.
High Performance
We use premium materials for exceptional strength, wear resistance, and long-term durability in demanding environments.
Reliable Solutions for Chemical & Petrochemical Applications
Chemical and petrochemical applications require materials with high strength, excellent corrosion resistance, and long-term reliability. Our Duplex Stainless Steel tubes are engineered for aggressive environments, offering strong resistance to chlorides, acids, and pressure fluctuations while maintaining reliable mechanical performance. Available in various wall thicknesses and diameters, they meet demanding process and system requirements.
With surface treatments such as pickling, passivation, and anti-corrosion coatings, these tubes ensure stable operation and extended service life. They are widely used in chemical plants, refineries, heat exchangers, and process piping systems.
High-Performance Solutions for Heat Exchangers & Cooling Systems
In heat exchanger and cooling system applications, materials must deliver high thermal efficiency, corrosion resistance, and long-term stability. Our Duplex Stainless Steel tubes combine high strength with excellent resistance to corrosion and thermal fatigue, ensuring reliable performance under high temperatures and pressure fluctuations.
With surface treatments such as electropolishing, pickling, and anti-corrosion coatings, these tubes provide enhanced durability and are widely used in heat exchangers, condensers, and industrial cooling systems for long-lasting, high-performance operation.
Customized Tubes for OEM and Manufacturing
In OEM and manufacturing settings, tailored solutions are essential to meet specific project requirements. Our Duplex Stainless Steel tubes provide superior strength and corrosion resistance, supporting high-demand industrial applications. Customizable in wall thickness, length, and surface treatment, they adapt to the unique needs of automotive, aerospace, and heavy machinery sectors.
Durable yet lightweight, these tubes reduce overall weight while maintaining structural integrity, making them ideal for fluid transport, heat exchangers, and mechanical assemblies. Engineered for precise integration, our Duplex Stainless Steel tubes offer reliable, long-lasting performance across diverse manufacturing processes.
Duplex Stainless Steel Tube Customization Flow
Easily customize your duplex stainless steel tubes to match your project requirements by following the steps below.
Custom Duplex Stainless Steel Tube FAQs
Can you handle large-scale production of duplex stainless steel tubes?
Yes, we have high-capacity production lines capable of delivering consistent quality for large-volume orders.
Do you offer customization for specific industrial projects?
Absolutely. We tailor wall thickness, surface treatments, and end preparation to meet project-specific engineering requirements.
How do you ensure corrosion resistance during transportation and storage?
Tubes are coated with anti-rust oil or protective films, and packed securely to prevent surface damage or oxidation.
What is your lead time for custom duplex stainless steel tubes?
Lead times vary by quantity and specification, but we prioritize efficient scheduling to meet project deadlines.
Can these tubes be integrated with existing piping or equipment?
Yes, our tubes are manufactured to meet industry compatibility standards for seamless integration with existing systems.
What kind of quality assurance do you provide?
Each batch of duplex stainless steel tubes is supplied with EN 10204 3.1 material test certificates.
Quality control includes chemical composition analysis, dimensional inspection, and mechanical testing.
Ferrite content verification and corrosion resistance testing are conducted when required.
Non-destructive testing (ECT or UT) and third-party inspection reports are available upon request.
Do you support after-sales technical guidance?
Yes, our technical team provides installation advice, maintenance tips, and troubleshooting support to ensure long-term performance.
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