Stainless Steel Pipe | ERW-Welded 304L/316L Durability

Stainless Steel Pipe | ERW-Welded 304L/316L Durability

Product Overview

Our ERW-welded 304L/316L stainless steel pipes combine precision engineering with superior corrosion resistance, making them ideal for demanding applications like stainless steel flue pipe systems, chemical processing, and offshore infrastructure. Manufactured using advanced Electric Resistance Welding (ERW) technology, these pipes ensure seamless structural integrity and compliance with ASTM, ASME, and ISO standards. With global availability through our network as a leading stainless steel pipe distributor and stainless steel pipe exporter, we deliver reliability for industries requiring durability in harsh environments.

Technical Specifications

Key Attributes

1. ERW-Welded Durability: Precision welding ensures uniform grain structure and leak-proof joints, critical for stainless steel flue pipe systems in high-temperature exhaust applications.
2. Corrosion Resistance:
   • 304L: 18-20% chromium and 8-12% nickel resist oxidation and mild acids.
   • 316L: 2-3% molybdenum enhances chloride resistance, ideal for marine and chemical environments.
3. Low Carbon Content (≤0.03%): Minimizes carbide precipitation during welding, ensuring post-weld corrosion resistance without annealing.
4. Thermal Stability: Withstands temperatures up to 870°C (304L) and 843°C (316L), suitable for industrial chimneys and heat exchangers.

Detailed Performance Characteristics

Tensile & Bend Strength

• Tensile Strength:
  Both grades achieve ≥485 MPa, ensuring structural integrity in high-pressure systems like hydraulic lines and offshore platforms. The austenitic microstructure and ERW process prevent stress concentration at welds.
  
• Bend Strength:
  Cold-drawn ERW pipes retain ductility even under tight-radius bends, making them ideal for custom stainless steel flue pipe layouts in HVAC and exhaust systems.

Identification Methods

• Laser Etching/Stamping: Permanent markings include grade (e.g., "304L" or "316L"), OD, thickness, and heat number per ASTM A480.
• Certification: Mill Test Reports (MTRs) validate chemical composition (Cr, Ni, Mo) and mechanical properties for full traceability.

Weight Calculation

Use the formula:
Weight (kg/m)=1000(OD−WT)×WT×0.0248
Example: A 100mm OD pipe with 5mm wall thickness weighs ~11.6 kg/m. For bulk orders, consult our stainless steel pipe distributor team for customized solutions.

Causes of Stainless Steel Rust

Despite its corrosion resistance, rust can occur under:

1. Chloride Exposure: Seawater, de-icing salts, or industrial chemicals disrupt the passive chromium oxide layer, causing pitting.
2. Mechanical Damage: Scratches or abrasions expose raw metal to oxidation.
3. Galvanic Corrosion: Contact with dissimilar metals (e.g., carbon steel) in conductive fluids accelerates degradation.
4. Improper Welding: High carbon precipitation in heat-affected zones reduces corrosion resistance, mitigated by using ERW-welded 304L/316L.

Applications

• Industrial Chimneys: Stainless steel flue pipe systems resist acidic flue gases and high temperatures.
• Marine Engineering: 316L pipes excel in offshore platforms and ship exhausts.
• Chemical Processing: ERW-welded pipes handle sulfuric acid, alkalis, and chlorides.

Why Choose Our Stainless Steel Pipes?

1. Certified Quality: ASTM/ASME compliance with third-party inspections.
2. Global Supply Chain: As a trusted stainless steel pipe exporter, we ensure rapid dispatch of custom sizes worldwide.
3. Custom Solutions: Tailored OD, wall thickness, and surface finishes (e.g., electropolished) for seamless integration.
4. Technical Expertise: 20+ years in ERW welding and precision manufacturing.
5. Sustainability: 100% recyclable with eco-friendly packaging and carbon-neutral logistics.