Stainless Steel Pipes | Mirror-Polished TP 304/316L Cleanliness

Stainless Steel Pipes | Mirror-Polished TP 304/316L Cleanliness

Product Overview

Our mirror-polished TP 304/316L stainless steel pipes are engineered for applications demanding ultra-hygienic surfaces, corrosion resistance, and aesthetic excellence. Ideal for food processing, pharmaceuticals, semiconductor manufacturing, and high-end architectural projects, these pipes combine ASTM/ASME-compliant quality with a flawless mirror finish to ensure compliance with FDA, EHEDG, and 3-A sanitary standards.

Technical Specifications

Key Mechanical Properties

Tensile Strength

• TP 304: 485–620 MPa | TP 316L: 485–620 MPa
  
  The high tensile strength ensures resistance to deformation under extreme pressure, making these pipes suitable for hydraulic systems, chemical reactors, and high-temperature steam lines.

Bending Strength

• Both grades exhibit excellent ductility, allowing cold bending up to 180° without cracking. Compatible with hydraulic benders for precision shaping in HVAC, shipbuilding, and architectural installations.

Material Properties & Advantages

1. Hygienic Surface

   • Mirror polishing eliminates microscopic pits and cracks, preventing bacterial adhesion and simplifying CIP/SIP cleaning.
   • Electropolishing (optional) enhances passivation, improving corrosion resistance in acidic or chloride-rich environments.

2. Corrosion Resistance

   • TP 304: Resists organic acids, nitric acid, and oxidation.
   • TP 316L: Enhanced with 2–3% molybdenum for superior performance in seawater, sulfuric acid, and chloride-laden environments.

3. Temperature Stability

   • Operates reliably from -200°C to 870°C (TP 304) and -200°C to 800°C (TP 316L), suitable for cryogenic and high-heat applications.

Weight Calculation Formula

Weight (kg/m) = (OD – WT) × WT × 0.02491
Example: For a 4 inch stainless steel pipe (OD: 114.3 mm, WT: 6.0 mm):
(114.3 – 6.0) × 6.0 × 0.02491 = 16.1 kg/m

Why Stainless Steel Pipes Corrode?

Despite their corrosion-resistant properties, stainless steel can rust under specific conditions:

1. Chloride Exposure: Prolonged contact with seawater, bleach, or de-icing salts induces pitting corrosion.
2. Galvanic Corrosion: Direct contact with carbon steel or copper in conductive fluids accelerates electrochemical degradation.
3. Low Oxygen Environments: Stagnant water or crevices prevent the formation of chromium oxide layers, leading to crevice corrosion.
4. Improper Welding: Unpassivated welds or heat-affected zones (HAZ) become vulnerable to intergranular corrosion.

Identification & Marking

• Laser Etching: Permanent labels include grade (TP 304/316L), OD, WT, heat number, and ASTM/ASME compliance.
• Color Coding: Blue bands for TP 316L and yellow bands for TP 304 ensure quick visual identification.

Applications

• Food & Beverage: Dairy processing lines, brewery systems, and stainless steel welded pipe networks for hygienic fluid transfer.
• Pharmaceuticals: Cleanroom piping, API production, and stainless steel threaded pipe connections for sterile environments.
• Architecture: Decorative handrails, façades, and 4 inch stainless steel pipe structural supports.

Why Choose Our Stainless Steel Pipes?

1. Certified Quality: Compliant with ASTM, ASME, EN, and ISO standards. Full traceability with Mill Test Reports (MTRs) and 3.1 certification.
2. Custom Solutions: Tailored dimensions, bends, stainless steel threaded pipe ends, and welded joints for complex systems.
3. Global Inventory: Immediate availability of 4 inch stainless steel pipe and other sizes in TP 304/316L grades.
4. Sustainability: 100% recyclable material with a 100+ year lifespan, reducing environmental impact.
5. Technical Support: 24/7 engineering assistance for material selection, corrosion prevention, and installation.