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Reliable Stainless Steel Tubing Coil | ASTM & AISI Certified Durability
Reliable Stainless Steel Tubing Coil | ASTM & AISI Certified Durability
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Reliable Stainless Steel Tubing Coil | ASTM & AISI Certified Durability
Product Overview
Our stainless steel tubing coil is engineered for demanding industrial applications, combining corrosion resistance with ASTM/AISI-certified mechanical durability. Designed for seamless integration into stainless steel coil heat exchanger systems, hydraulic networks, and chemical processing pipelines, this product ensures longevity in high-temperature and corrosive environments. Manufactured with precision cold-rolled 304/316L grades, it guarantees dimensional accuracy and surface uniformity for critical projects.
Technical Specifications
1. Material & Mechanical Properties
| Parameter | Specification |
|---|---|
| Material Grade | ASTM A269 / AISI 304, 316L, 321 |
| Outer Diameter | 6.35mm – 114.3mm (±0.1mm tolerance) |
| Wall Thickness | 0.5mm – 6.0mm (±5% tolerance) |
| Surface Finish | 2B, BA, Annealed, Polished (Ra ≤0.8μm) |
| Tensile Strength | ≥515 MPa (304), ≥485 MPa (316L) |
| Yield Strength | ≥205 MPa (304), ≥170 MPa (316L) |
| Hardness (HV) | 150–220 (Annealed) |
| Max Operating Temp | 870°C (304), 800°C (316L) |
2. Chemical Composition
| Grade | C (%) | Cr (%) | Ni (%) | Mo (%) | Mn (%) |
|---|---|---|---|---|---|
| 304 | ≤0.08 | 18–20 | 8–10.5 | – | ≤2.0 |
| 316L | ≤0.03 | 16–18 | 10–14 | 2–3 | ≤2.0 |
Key Features & Applications
1. Corrosion Resistance
The stainless steel tubing coil features a chromium-rich passive oxide layer (12–18% Cr) that prevents rust in chloride-rich environments like marine or chemical plants. Ideal for stainless steel pipe coil networks in offshore oil rigs or desalination systems.
2. Thermal Efficiency
Optimized for stainless steel coil heat exchanger applications, our coils deliver superior heat transfer rates (k=16.3 W/m·K for 304) while resisting scaling at high temperatures.
3. Precision Manufacturing
- Cold-Rolled Process: Reduces wall thickness variation to ±0.05mm for seamless welding.
- Annealing: Eliminates internal stresses, enhancing ductility for bending (180° without cracking).
Performance & Durability
1. Tensile & Bend Strength
- Tensile Strength: Exceeds 515 MPa (304) and 485 MPa (316L), ensuring structural integrity in high-pressure systems like stainless steel pipe coil frameworks.
- Bend Strength: Supports a minimum bend radius of 1.5× outer diameter (e.g., 9.5mm for 6.35mm tubing).
2. Weight Calculation
Formula:
Weight (kg/m) = (OD – WT) × WT × 0.02466
Example: 25.4mm OD × 2mm WT = (25.4 – 2) × 2 × 0.02466 ≈ 1.18 kg/m.
3. Rust Prevention Mechanisms
Despite inherent corrosion resistance, rust may occur due to:
- Chloride Exposure: Prolonged contact with seawater (>50 ppm Cl⁻) degrades passive layers.
- Galvanic Corrosion: Contact with carbon steel or copper in humid environments.
- Mechanical Damage: Scratches or improper handling exposing the substrate.
Certifications & Compliance
- Standards: ASTM A269 (seamless tubing), ASME SB-165 (heat exchangers).
- Testing: Eddy current, hydrostatic (60 MPa), and salt spray (1,000+ hours).
Why Choose Our Stainless Steel Tubing Coil?
- Certified Quality: ISO 9001 and PED 2014/68/EU compliance ensures global industrial standards.
- Competitive Pricing: Bulk stainless steel pipe coil orders start at $2,800/ton (304) with volume discounts.
- Rapid Delivery: 15-day lead time for standard sizes, supported by 10,000-ton annual capacity.
- Custom Solutions: Tailored OD/WT ratios, polishing grades (No.4 to Mirror), and laser-marked identification.
- Technical Support: 24/7 engineering guidance for stainless steel coil heat exchanger integration.
