Ultrasonically Cleaned Internal Surface Stainless Steel Coil Tube
Product Overview
Wenzhou Jixing Metal Materials Co., Ltd. presents a premium-grade stainless steel coil tube (Coil Tube) featuring an advanced ultrasonic internal surface cleaning process. This product is engineered to deliver exceptional internal cleanliness by leveraging high-frequency ultrasonic cavitation effects to dislodge and remove micro-particles, including mechanically embedded contaminants that conventional cleaning methods cannot address. The resulting internal surface achieves a cleanliness level significantly superior to that of standard chemical cleaning alone, making it an ideal solution for applications demanding the highest standards of purity and hygiene.
As a coil tube product, it is supplied in continuous coiled form, facilitating efficient downstream processing such as cutting, bending, and forming without the need for additional joint welding—thereby minimizing contamination risk and ensuring process integrity throughout the manufacturing chain.
Material & Properties
- Base Material: Austenitic stainless steel (grades 304, 304L, 316, 316L, 321, and custom alloys available upon request)
- Corrosion Resistance: Excellent resistance to pitting, crevice, and general corrosion across a wide pH range
- Mechanical Strength: High tensile strength with good ductility, suitable for cold forming and deep drawing
- Weldability: Superior welding characteristics with minimal distortion and excellent joint integrity
- Hygienic Properties: Smooth internal surface finish with low surface roughness, resistant to bacterial adhesion and biofilm formation
- Temperature Range: Operable from cryogenic temperatures (−196 °C / −320 °F) up to 870 °C (1,598 °F) depending on grade
- Surface Treatment: Ultrasonic internal cleaning using high-frequency cavitation to remove mechanically embedded particles and micro-contaminants
Specifications
| Parameter | Specification |
|---|---|
| Product Type | Seamless Stainless Steel Coil Tube |
| Ultrasonic Frequency | 20–40 kHz (high-frequency cavitation) |
| Internal Surface Cleanliness | Superior to chemical cleaning alone; mechanically embedded particles removed |
| Internal Surface Roughness (Ra) | ≤ 0.4 μm (16 μin) — available upon request |
| Outer Diameter (OD) | 3.0 – 50.8 mm (0.118 – 2.000 in) |
| Wall Thickness | 0.3 – 3.0 mm (0.012 – 0.118 in) |
| Available Grades | 304, 304L, 316, 316L, 321, 904L, 310S |
| Coil Length | Custom lengths available; standard coil weights 100–500 kg (220–1,100 lb) |
| Manufacturing Standard | ASTM A269, ASTM A270, EN 10216-5, GB/T 12771 |
| Surface Finish (Internal) | Ultrasonically cleaned; particle-free, passivated |
| Surface Finish (External) | 2B, BA, No. 4 brushed, or custom |
| Tolerance (OD) | ±0.05 mm (±0.002 in) |
| Tolerance (Wall Thickness) | ±10% of nominal |
Manufacturing Process
- Material Selection & Inspection: High-purity stainless steel billets are sourced from certified mills and subjected to incoming chemical and dimensional verification.
- Piercing & Hot Rolling: Billets are heated to controlled temperatures and pierced to produce seamless tube blanks, ensuring a continuous, joint-free cross-section.
- Cold Drawing & Coiling: The tube blanks are cold-drawn to precise dimensional tolerances and wound into continuous coils for ease of handling and downstream processing.
- Pickle & Passivation: Tubes undergo acid pickling and passivation to remove mill scale and form a protective chromium oxide layer.
- Ultrasonic Internal Cleaning: Tubes are submerged in a degassed cleaning medium and exposed to high-frequency ultrasonic transducers (20–40 kHz). The resulting cavitation bubbles implode with tremendous localized energy, effectively dislodging mechanically embedded micro-particles, oxide debris, and other contaminants from the internal surface. This process achieves a cleanliness level that surpasses traditional chemical immersion cleaning.
- Final Rinse & Drying: Tubes are rinsed with deionized water and dried under controlled conditions to prevent re-contamination.
- Quality Inspection: Each coil undergoes ultrasonic flaw detection, dimensional verification, and visual inspection to confirm compliance with specified tolerances and cleanliness standards.
Unique Selling Points
- Superior Internal Cleanliness: Ultrasonic cavitation removes mechanically embedded particles that chemical cleaning alone cannot dislodge, ensuring a truly particle-free internal surface.
- No Mechanical Abrasion: Unlike wire brushing or abrasive blasting, ultrasonic cleaning does not introduce surface scratches or embed foreign particles, preserving the integrity of the stainless steel passivation layer.
- Environmental Advantage: Reduced chemical consumption compared to aggressive chemical-only cleaning processes, contributing to lower environmental impact and safer working conditions.
- Consistent Quality: Automated ultrasonic cleaning delivers uniform results across the entire coil length, eliminating variability associated with manual cleaning methods.
- Seamless Coil Form: Continuous coil delivery eliminates the need for butt-welding, reducing contamination vectors and improving process efficiency in downstream fabrication.
- Customization: Flexible specifications including OD, wall thickness, grade, and coil length to meet diverse application requirements.
Applications
- Pharmaceutical & Biotechnology: CIP/SIP systems, bioreactors, purification trains, and sterile fluid transfer lines requiring ultra-clean internal surfaces.
- Food & Beverage Processing: Dairy, beverage, and food-grade piping systems where hygiene and residue-free conditions are critical.
- Semiconductor Manufacturing: Ultra-pure water (UPW) delivery systems, chemical transport lines, and gas delivery systems requiring particle-free tubing.
- Medical Devices: Component tubing for medical instruments, dialysis systems, and implant manufacturing.
- Chemical Processing: Corrosive fluid transport in chemical plants where internal purity affects product quality.
- Cryogenic Systems: Liquefied natural gas (LNG) and cryogenic transfer lines requiring clean, low-carbon-steel-contaminant-free tubing.
Quality Certifications
- ISO 9001:2015 — Quality Management System
- ISO 14001:2015 — Environmental Management System
- EN 10204 3.1 — Material Test Certificates
- ASTM A269 / A270 — Compliance for welded and seamless stainless steel tubing
- EN 10216-5 — European standard for stainless steel tubes
- GB/T 12771 — Chinese national standard for stainless steel seamless tubes
- Mill Test Reports (MTR) — Full chemical analysis and mechanical property data provided per heat number
- Optional: FDA-compliant documentation, 3-A Sanitary Standards, and ASME B31.3 process piping compliance upon request
Note: Ultrasonic cleaning is recommended as a complementary process to standard chemical passivation. For applications requiring the highest internal cleanliness (e.g., semiconductor or pharmaceutical Grade 1A water systems), Wenzhou Jixing Metal Materials Co., Ltd. offers a combined electro-polishing and ultrasonic cleaning package that delivers Ra ≤ 0.2 μm (8 μin) internal surface roughness with verified particle counts below 10 particles ≥ 0.5 μm per 100 mL.