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Stainless Steel Pipes | Factory-Direct AISI 304L/317L Supply 🏭

Stainless Steel Pipes | Factory-Direct AISI 304L/317L Supply 🏭

$1,350.00 SGD
$1,350.00 SGD
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Stainless Steel Pipes | Factory-Direct AISI 304L/317L Supply

Technical Specifications

Property AISI 304L AISI 317L
Material Grade UNS S30403 / EN 1.4306 UNS S31703 / EN 1.4438
Chemical Composition 18–20% Cr, 8–12% Ni, ≤0.03% C 18–20% Cr, 11–15% Ni, 3–4% Mo
Tensile Strength 485–685 MPa 515–750 MPa
Yield Strength 170 MPa 205 MPa
Hardness (Rockwell B) 70–90 HRB 85–95 HRB
Temperature Resistance Up to 870°C (continuous) Up to 925°C (continuous)
Corrosion Resistance Excellent for general use Superior in acidic/chloride environments
Standard Compliance ASTM A312, A269, EN 1.4306 ASTM A312, A249, EN 1.4438
Dimensions (OD) stainless steel pipe sizes: 6–2500 mm 6–2500 mm
Wall Thickness 0.5–150 mm 0.5–150 mm
Surface Finish Annealed, Pickled, Polished Annealed, Electropolished
Process ERW/Seamless, Cold Drawing TIG Welding, Seamless

Key Attributes

  1. Industrial-Grade Durability

    • AISI 304L: Ideal for stainless steel stove pipe systems in kitchens and industrial furnaces, maintaining oxidation resistance at high temperatures.
    • AISI 317L: Enhanced molybdenum content (3–4%) combats pitting in sulfuric, acetic, and phosphoric acid environments, perfect for chemical processing plants.

  2. Mechanical Strength

    • Tensile Strength: AISI 317L outperforms 304L in high-stress applications, with a tensile range of 515–750 MPa, suitable for offshore platforms and oil refineries.
    • Bend Strength: Both grades support cold forming and welding, critical for custom stainless steel pipe sizes in construction and HVAC systems.

  3. Versatility

    • Compatible with stainless steel stove pipe installations for heat resistance and low thermal expansion.
    • Available in stainless steel pipe sizes from 6 mm to 2500 mm OD, catering to plumbing, food processing, and pharmaceutical industries.

Weight Calculation

The weight of stainless steel pipes is calculated using:

Where:

  • : Outer Diameter (mm)
  • : Wall Thickness (mm)

Example: A stainless steel stove pipe with 150 mm OD and 8 mm wall thickness weighs 28.52 kg/m.

Identification & Marking

  • Laser Etching: ASTM/EN standards, heat number, and grade (e.g., "304L" or "317L").
  • Color Coding: Optional bands for inventory management in industrial settings.

Why Do Stainless Steel Pipes Rust?

Despite their corrosion-resistant properties, rust can occur due to:

  1. Chloride Exposure: Coastal or industrial environments degrade passive oxide layers, especially in welded joints without post-weld cleaning.
  2. Intergranular Corrosion: Improper welding of AISI 304L without nitrogen stabilization leads to chromium carbide formation at grain boundaries.
  3. Surface Contamination: Iron particles from cutting tools or grease disrupt the protective chromium oxide layer.
  4. Low-Quality Alloys: Substandard nickel or molybdenum content reduces resistance to reducing acids like hydrochloric.

Applications

  • AISI 304L: Food processing, water treatment, and stainless steel stove pipe for residential/commercial kitchens.
  • AISI 317L: Chemical reactors, offshore oil platforms, and pharmaceutical equipment.

Why Choose Our Stainless Steel Solutions?

  1. Factory-Direct Pricing: Eliminate middlemen—stainless steel pipe near me ensures competitive rates and faster delivery.
  2. Certified Quality: ISO 9001, ASTM, and EN compliance, backed by SGS/TUV certifications.
  3. Customization: Tailored stainless steel pipe sizes, surface finishes, and cut-to-length services.
  4. Global Inventory: 10,000+ tons in stock, ready for stainless steel stove pipe and industrial projects.
  5. Sustainability: 100% recyclable with 50+ year lifespans, reducing environmental impact.
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