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Stainless Steel Pipe | 316L Petrochemical Corrosion Defense
Stainless Steel Pipe | 316L Petrochemical Corrosion Defense
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Stainless Steel Pipe | 316L Petrochemical Corrosion Defense
Product Specifications
Material Grade: 316L (UNS S31603)
Standards: ASTM A312, ASME SA312, EN 10217-7
Corrosion Resistance: Enhanced by 2-3% molybdenum for chloride-rich and acidic environments.
| Property | Value |
|---|---|
| Outer Diameter (OD) | 6 mm – 2,500 mm (including 10 inch stainless steel pipe at 273 mm) |
| Wall Thickness | 1 mm – 150 mm (adjustable for pressure ratings) |
| Hardness (Rockwell B) | ≤95 HRB |
| Hardness (Vickers) | ≤200 HV |
| Surface Finish | Pickled, Annealed, Polished, Electropolished |
| Tolerance | OD ±0.1%, WT ±10% |
Technical Attributes
Tensile & Bend Strength
316L stainless steel exhibits tensile strength ≥485 MPa and yield strength ≥170 MPa, ensuring structural integrity under extreme pressure and mechanical stress. Its elongation (≥40%) allows seamless bending for complex layouts, such as stainless steel vent pipe systems in refineries. The alloy’s ductility prevents cracking during installation or seismic activity, making it ideal for petrochemical pipelines.
Weight Calculation Formula
Weight per meter (kg/m) = (OD – Wall Thickness) × Wall Thickness × 0.0248
Example: For a 10 inch stainless steel pipe (OD 273 mm, thickness 6.35 mm):
Weight = (273 – 6.35) × 6.35 × 0.0248 ≈ 38.7 kg/m.
Identification Marking
All pipes are laser-etched with:
- ASTM/ASME standard (e.g., ASTM A312).
- Grade (316L), OD, thickness, heat number, and manufacturer’s logo.
- Traceability codes for quality audits.
Why Does Stainless Steel Rust?
While 316L resists corrosion better than 304, rust can occur under:
- Chloride exposure: Prolonged contact with seawater (>500 ppm chloride) or acidic chemicals (e.g., sulfuric acid) disrupts the chromium oxide layer.
- Mechanical damage: Scratches from improper handling or abrasive cutting tools expose raw metal to oxidation.
- High-temperature oxidation: Sustained use above 870°C accelerates scaling, particularly in non-annealed pipes.
Manufacturing & Customization
Processes:
- Cold drawing: Enhances dimensional precision for stainless steel threaded pipe fittings.
- TIG welding: Seamless joints for high-pressure petrochemical pipelines.
- Solution annealing: Heated to 1,040–1,100°C and water-quenched to eliminate carbide precipitation.
Custom Options:
- Threading: NPT, BSPP, or BSPT threads for secure connections.
- Ventilation systems: Custom stainless steel vent pipe designs with electropolished interiors to reduce particulate buildup.
Applications
- Petrochemical pipelines: Resists H₂S, CO₂, and sulfuric acid in offshore rigs.
- Ventilation ducts: Corrosion-proof stainless steel vent pipe for chemical plants.
- Threaded fittings: High-pressure stainless steel threaded pipe fittings for refinery valve systems.
Why Choose Our 316L Stainless Steel Pipes?
- Material Integrity: Full traceability with EN 10204 3.1 Mill Test Certificates and third-party SGS/BV inspections.
- Custom Solutions: Tailored 10 inch stainless steel pipe and threaded fittings for ASTM/ASME compliance.
- Global Inventory: 5,000+ tons of ready stock, including SCH 10S to 160XXS schedules.
- Technical Support: 24/7 engineering guidance on welding, cutting, and corrosion prevention.
- Sustainability: 100% recyclable material with ISO 14001-certified production.
