2 1/2 ” Stainless Steel Welded Tube 316

Product Overview

Stainless steel welded tubes, particularly ​316L stainless steel welded tubes, are renowned for their superior resistance to harsh chemicals, chlorides, and high temperatures. These tubes are ideal for industries requiring uncompromising material integrity, such as offshore oil rigs, pharmaceutical manufacturing, and desalination plants. Our ​high-performance stainless steel welded tubes comply with ASTM A269, ASTM A312, and EN 10217-7 standards, ensuring compliance with global quality and safety regulations.

​Technical Specifications

The table below outlines key dimensions, mechanical properties, and manufacturing details:

​In-Depth Technical Breakdown

​1. Tensile Strength & Bending Performance

Stainless steel welded tubes made from 316L alloy exhibit ​tensile strength ranging from ​520 MPa to 690 MPa, outperforming standard 304-grade tubes in corrosive and high-stress environments. This strength ensures reliability in critical applications like pressure vessels, heat exchangers, and subsea pipelines.

Bending strength (350–580 MPa) reflects the material’s ability to resist deformation under lateral loads. This property is vital for structural components in coastal infrastructure, where wave forces and saltwater exposure demand exceptional resilience.

​2. Material Identification & Certification

Authentic ​316L stainless steel welded tubes are verified through:

• ​Grade Markings: Laser-etched “316L” or “UNS S31603” near tube ends.
• ​Chemical Composition: 16–18% chromium, 10–14% nickel, 2–3% molybdenum, and ≤0.03% carbon for enhanced weldability and corrosion resistance.
• ​Certification Documents: Mill Test Certificates (MTCs) confirming compliance with ASTM/EN standards, along with PMI (Positive Material Identification) reports.

Third-party inspections and XRF (X-ray fluorescence) testing validate material authenticity and traceability.

​3. Weight Calculation Guidelines

The weight of a ​stainless steel welded tube depends on its outer diameter, wall thickness, and length. For example:

• A 50mm OD tube with a 3mm wall thickness will weigh approximately ​3.6 kg/m, ideal for lightweight structural frameworks.
• Thicker walls (e.g., 10mm) increase weight to ​12.2 kg/m, suitable for high-pressure industrial piping.
  Contact our engineering team for precise weight calculations tailored to your specifications.

​4. Corrosion Resistance & Causes of Rust

While ​316L stainless steel welded tubes excel in resisting pitting and crevice corrosion, rust may occur under extreme conditions:

• ​Chloride-Rich Environments: Prolonged exposure to seawater or chemical brines can degrade the passive oxide layer.
• ​Galvanic Corrosion: Contact with dissimilar metals (e.g., carbon steel) in conductive fluids creates electrochemical reactions.
• ​Mechanical Damage: Scratches or improper welding can expose the base metal to oxidation.

Preventative Solutions:

• Use protective coatings (e.g., epoxy or PTFE) in aggressive environments.
• Ensure proper welding techniques to maintain the alloy’s integrity.
• Implement routine inspections and cleaning with non-abrasive agents.

​Industrial Applications

316L stainless steel welded tubes are indispensable in high-risk sectors:

• ​Oil & Gas: Downhole tubing, LNG pipelines, and refinery equipment.
• ​Pharmaceutical: Sterile fluid transfer systems, bioreactors, and cleanroom infrastructure.
• ​Marine: Shipbuilding components, desalination plants, and offshore platform supports.
• ​Chemical Processing: Acid storage tanks, reactor vessels, and exhaust scrubbers.

​Quality Assurance & Testing

Our ​high-performance stainless steel welded tubes undergo rigorous quality checks, including:

• ​Hydrostatic Testing: Tubes are pressurized to 1.5x their rated capacity to ensure leak-proof performance.
• ​Eddy Current Testing: Detects surface cracks or inconsistencies in welded seams.
• ​Intergranular Corrosion Test: Verifies resistance to sensitization in welded zones.
• ​Dimensional Inspection: Laser scanning guarantees compliance with tolerances.

​Customization & Value-Added Services

• ​Precision Cutting: CNC-guided cutting for bespoke lengths and angles.
• ​Surface Finishes: Electropolishing for ultra-smooth surfaces in sanitary applications.
• ​Certification Packages: Custom documentation for FDA, ASME, or PED compliance.
• ​Protective Packaging: Foam-lined crates or PVC sleeves to prevent transit damage.

​Why Choose Our Stainless Steel Welded Tubes?

1. ​Superior Material Quality: 100% traceable raw materials from ISO-certified mills.
2. ​Technical Expertise: Over 20 years of experience in manufacturing corrosion-resistant alloys.
3. ​Rapid Turnaround: 85% of orders ship within 72 hours, even for custom sizes.
4. ​Global Logistics: Doorstep delivery via DHL, FedEx, or sea freight.
5. ​Sustainability Commitment: Eco-friendly production with 60% recycled content.

​Frequently Asked Questions (FAQs)

Q: Can 316L welded tubes handle acidic environments?
A: Yes, their molybdenum content provides exceptional resistance to sulfuric, acetic, and phosphoric acids.

Q: What is the difference between 316 and 316L stainless steel?
A: 316L has a lower carbon content (≤0.03%), minimizing carbide precipitation during welding, making it ideal for welded structures.

Q: Do you offer anti-corrosion warranties?
A: We provide a 10-year warranty against material defects when used in specified environments.

​Order Your 316L Stainless Steel Welded Tubes Today!

Browse our inventory of ​stainless steel welded tubes, including ​316L stainless steel welded tubes tailored for extreme conditions. Request a quote online or contact our sales team for personalized support.