316L Bright Annealed Stainless Steel Pipe With Ultrasonic Cleaning and Degreased Surface
316L Stainless Steel Bright Annealed (BA) Pipes are ultra-low carbon stainless steel pipes (C≤0.03%) with superior corrosion resistance, particularly suitable for conveying corrosive gases and medical gases. Manufactured through a specialized bright annealing process in an inert or reducing atmosphere, these pipes feature a high-gloss, oxide-free surface with excellent surface finish and cleanliness. With precise dimensional tolerances and high-purity surface requirements, they are the ideal material for critical applications in semiconductor, pharmaceutical, food, and high-tech industries.
| Element | 316L Composition | Material Standards |
|---|---|---|
| Carbon (C) | ≤0.035% | Domestic: GB/T 14976-2022, GB/T 12771-2000 |
| Silicon (Si) | ≤1.00% | International: ASTM A269, ASTM A270, ASME A270-BPE |
| Manganese (Mn) | ≤2.0% | European: EN10216-5, EN10305-1 |
| Phosphorus (P) | ≤0.045% | Japanese: JIS G4305, JIS G3447 |
| Sulfur (S) | ≤0.030% | |
| Nickel (Ni) | 10.0-14.0% | |
| Chromium (Cr) | 16.0-18.0% | |
| Molybdenum (Mo) | 2.0-3.0% |
Other Available Materials: 304, 304L, 316, 316Ti, 321, 347H, 310S, 904L, 2205, 2507, 2520, C276
Dimensions & Tolerances| Parameter | Specification Range | Tolerance |
|---|---|---|
| Outer Diameter (OD) | 3mm - 146mm | ±0.05mm (Min. 0.02mm) |
| Wall Thickness (WT) | 0.5mm - 6mm | ±0.05mm |
| Length | 1000mm - 12000mm (Customizable) | ±1mm |
| Shape | Round Pipes (Primary) |
Imperial Size Reference:
1/4" (6.35mm OD), 3/8" (9.53mm), 1/2" (12.70mm), 3/4" (19.05mm), 1" (25.40mm)
1-1/2" (38.10mm), 2" (50.80mm), 2-1/2" (63.5mm), 3" (76.20mm), 4" (101.60mm), 5" (152.4mm)
| Parameter | Specification | Process |
|---|---|---|
| Surface Roughness (Ra) | Outer: ≤0.4μm Inner (BA Grade): ≤0.3μm Inner (EP Grade): ≤0.25μm High Clean (Food/Pharma): ≤0.8μm | 1. Bright Annealing: Heat treatment in H₂/N₂/Ar atmosphere 2. Mechanical Polishing: Gradual fine-grit polishing 3. Ultrasonic Cleaning: SC2286 cleaning agent 4. Degreasing: Oil content ≤120mg/m² |
| Surface Treatment | Oxide-free, bright metallic finish |
| Property | 316L BA Pipe |
|---|---|
| Tensile Strength | ≥480 MPa (Controllable: 626-1270 MPa) |
| Yield Strength | ≥175 MPa |
| Elongation | ≥30% (Controllable: 40-65%) |
| Hardness | HRC 16-38 (Controllable: HV160-400) |
| Density | 7.98 g/cm³ |
Electrical Resistivity: 74×10⁻⁸ Ω·m
Specific Heat Capacity: 0.5 Kj/(Kg·°C) (0-100°C)
Oxidation Critical Temperature: Continuous use 900°C, Intermittent use 810°C
Corrosion Resistance: Excellent, especially in chloride environments (approx. 30% lower corrosion rate in 5% NaCl solution)
Tests: Intergranular corrosion test (oxalic acid etch), Salt spray test (GB/T 10125-2012)
Hydrostatic Test: 2.5x working pressure, hold 5 seconds (leak-free)
Non-Destructive Testing: Eddy current, Ultrasonic thickness measurement
Hardness Test: Cold-drawn ≤250 HBW, Solution-treated ≤217 HBW
Food/Pharma Compliance: GB 4806.9-2016 migration test requirements
Superior Corrosion Resistance: Ideal for chloride and acidic environments
High Surface Purity: Oil-free, contaminant-free surface suitable for high-purity applications
Excellent Dimensional Precision: Tight tolerances for critical installations
Versatile Material Options: Available in various stainless steel grades
Industry Compliance: Meets international standards for multiple sectors
Semiconductor Industry: Ultra-high purity gas delivery systems
Pharmaceutical/Biotech: Medical devices, bioprocessing equipment
Food & Beverage: Sanitary process piping, purification systems
Instrumentation: Precision instrument and analytical system piping
Chemical Processing: Corrosive fluid and gas transfer lines
Energy Sector: Hydrogen energy, solar, photovoltaic systems
Aerospace: High-precision tubing, hydraulic systems
Protective Packaging: Individual pipe bagging, end caps, anti-static bags
Secure Shipping: Bubble wrap cushioning, wooden crates or woven bags
Clear Marking: Spray-coded material, size, and specification information
Storage: Dry, ventilated environment away from corrosive substances
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