Stainless Steel Pipe | 304L/316L Factory-Direct Bulk Pricing

Stainless Steel Pipe | 304L/316L Factory-Direct Bulk Pricing

Product Overview

Our 304L/316L stainless steel pipes are precision-engineered for industrial and commercial applications requiring exceptional corrosion resistance, durability, and cost efficiency. Manufactured under strict ASTM/ASME standards, these pipes are ideal for stainless steel exhaust pipe cleaner systems, chemical processing, and high-pressure hydraulic networks. With factory-direct pricing, third-party certifications (ISO 9001, SGS), and global stock availability, we deliver tailored solutions for seamless integration into demanding environments.

Technical Specifications

For bulk orders of stainless steel pipe 304 or custom stainless steel pipe couplers, contact our team for competitive quotes.

Key Attributes

1. Corrosion Resistance:
   • 304L: 18-20% chromium and 8-10% nickel resist oxidation in mild acids and freshwater.
   • 316L: 2-3% molybdenum enhances chloride resistance, ideal for marine and chemical environments.
2. Thermal Stability: Withstands temperatures up to 870°C (304L) and 843°C (316L), perfect for exhaust systems and boilers.
3. Hygienic Design: Mirror-polished surfaces (Ra ≤0.3μm) meet NSF/ANSI 372 standards for food and pharmaceutical use.

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 prevents stress concentration, critical for welded joints in stainless steel pipe couplers assemblies.
• Bend Strength:
  Cold-drawn pipes retain ductility under tight-radius bends (1.5x OD). Use mandrel bending tools to avoid work hardening.

Identification Methods

• Laser Etching/Stamping: Permanent markings include grade ("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.

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. Download our stainless steel pipe chart for bulk calculations.

Causes of Stainless Steel Rust

Despite its corrosion resistance, rust can occur under:

1. Chloride Exposure: Seawater or de-icing salts disrupt the passive chromium oxide layer, causing pitting.
2. Mechanical Damage: Scratches from improper handling expose raw metal to oxidation.
3. Galvanic Corrosion: Contact with carbon steel in conductive fluids accelerates degradation.
4. Improper Welding: High carbon precipitation in heat-affected zones reduces corrosion resistance. Use low-carbon 304L/316L and post-weld annealing.

Applications

• Exhaust Systems: Stainless steel exhaust pipe cleaner retrofits leverage high-temperature stability and chloride resistance.
• Chemical Processing: 316L pipes handle sulfuric acid, alkalis, and chlorides in reactors.
• Hydraulic Networks: Precision-cut stainless steel pipe 304 components for high-pressure fluid transfer.

Why Choose Our Stainless Steel Pipes?

1. Factory-Direct Pricing: Eliminate middleman markups with bulk-order discounts up to 30%.
2. Certified Quality: ASTM/ASME compliance with third-party inspections and ISO 9001 certification.
3. Global Supply: As a leading exporter, we ensure 15-30 day delivery for bulk orders.
4. Custom Solutions: Tailored OD, wall thickness, and surface finishes (e.g., electropolished).
5. Sustainability: 100% recyclable with eco-friendly packaging and carbon-neutral logistics.