Stainless Steel Pipe | 304L/316L Hydraulic System Tubes

Stainless Steel Pipe | 304L/316L Hydraulic System Tubes

Product Overview

Our 304L/316L stainless steel hydraulic system tubes are engineered for high-performance applications in aerospace, industrial machinery, and offshore platforms. Manufactured under ASTM A312/ASME SA213 standards, these tubes combine superior corrosion resistance, precision tolerances (±0.1mm), and seamless integrity to withstand pressures up to 10,000 PSI. Ideal for stainless steel hydraulic pipe networks, our products ensure leak-free operation in extreme temperatures (-50°C to 400°C) and aggressive environments.

Technical Specifications

For custom stainless steel NPT pipe fittings or bulk orders of stainless steel pipe and fittings suppliers, contact our technical team for tailored solutions.

Key Attributes

1. Corrosion Resistance:
   • 304L: 18-20% chromium and 8-10% nickel resist oxidation in freshwater and mild acids.
   • 316L: 2-3% molybdenum enhances resistance to chlorides and sulfides, perfect for marine and chemical systems.
2. Thermal Stability: Withstands thermal cycling (870°C for 304L, 843°C for 316L) without deformation.
3. Hygienic Design: Mirror-polished surfaces (Ra ≤0.3μm) meet ISO 2037 standards for food and pharmaceutical applications.

Detailed Performance Characteristics

Tensile & Bend Strength

• Tensile Strength:
  Both grades achieve ≥485 MPa tensile strength, ensuring structural integrity in high-pressure hydraulic systems. The austenitic microstructure prevents stress concentration, critical for welded joints in stainless steel hydraulic pipe assemblies.
• Bend Strength:
  Cold-drawn tubes retain ductility under tight-radius bends (1.5x OD). Use mandrel bending tools to avoid work hardening, especially for complex layouts requiring stainless steel NPT pipe fittings.

Identification Methods

• Laser Etching/Stamping: Permanent markings include grade ("304L" or "316L"), OD, thickness, 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 tube with 5mm wall thickness weighs ~11.6 kg/m. Download our stainless steel pipe dimensions 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

• Hydraulic Power Units: Seamless 316L tubes handle high-pressure fluid transfer in construction machinery.
• Aerospace Fuel Lines: Stainless steel hydraulic pipe systems ensure reliability in extreme temperature fluctuations.
• Marine Systems: 316L tubes resist saltwater corrosion in offshore platforms and ship hydraulics.

Why Choose Our Stainless Steel Tubes?

1. Certified Quality: ASTM/ASME compliance with third-party inspections (ISO 9001, SGS).
2. Global Supply: Competitive pricing with 15-30 day delivery for bulk orders, including stainless steel pipe and fittings suppliers.
3. Technical Expertise: 24/7 guidance on stainless steel NPT pipe fittings integration and orbital welding protocols.
4. Sustainability: 100% recyclable with eco-friendly packaging and carbon-neutral logistics.
5. Cost Efficiency: 20-30% lifecycle savings vs. carbon steel alternatives due to zero maintenance and corrosion resistance.