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| Brand Name: | Yue lin sen |
| Model Number: | Y1226 |
| MOQ: | 100 pcs |
| Price: | 0.5-20 |
| Payment Terms: | T/T |
| Supply Ability: | 5000000pcs |
316L Stainless Steel Medical Capillary Tube Grinding Edge Marking Sandblasting Head Variable Diameter
316L Stainless Steel Medical Capillary Tube with Ground Bevel, Marking, Sandblasting, End Capping, and Diameter Reduction is a highly processed, multi-functional precision component designed for advanced medical and laboratory fluidic systems. It starts as a high-purity 316L stainless steel capillary tube and undergoes a series of value-added operations: a precision-ground bevel at the tip for sharp penetration or specific fluid egress, permanent laser marking for identification, uniform sandblasting for a cleanable matte finish and enhanced grip, hermetic end capping (sealing) at one terminus, and controlled diameter reduction (necking) along its length for fitting integration or flow control. This integrated processing creates a robust, traceable, and performance-optimized component ready for critical applications.
Material Verification & Cutting: Medical-grade 316L stainless steel capillary tubing (ASTM A269) is verified and cut to specified pre-form length.
Diameter Reduction (Necking): Using precision rotary swaging or micro-forming, specific sections of the tube are radially compressed to create a reduced outer diameter, often to form a step for an O-ring or to fit into a smaller port.
End Capping/Sealing: One end of the tube is hermetically sealed. This is achieved via cold-forming (forging the end into a solid dome) or orbital micro-welding (for the highest integrity seal, especially for pressurized applications).
Stress Relief Annealing: After cold working (necking, swaging), the part undergoes a controlled vacuum or inert atmosphere annealing cycle to relieve internal stresses, which is critical for 316L to prevent sensitization and restore corrosion resistance.
Bevel Grinding: The open distal end is precision-ground on a CNC micro-grinder to create a sharp, consistent bevel edge. The bevel angle (e.g., 20°, 30°) is tightly controlled for its intended function (piercing, dispensing).
Sandblasting (Bead Blasting): The entire external surface is uniformly sandblasted using high-purity, non-contaminating media (e.g., glass beads). This creates a consistent matte finish, removes any scale, and provides an optimal surface for subsequent marking.
Passivation: Following sandblasting, the component is chemically passivated per ASTM A967 (Method for 316L) to remove any embedded iron particles and restore the maximum corrosion-resistant passive oxide layer.
Laser Marking: A fiber laser system applies permanent, high-contrast markings onto the sandblasted surface. Markings can include part numbers, lot codes, size specifications, or flow direction arrows.
Final Cleaning & Inspection: A final precision cleaning (e.g., ultrasonic) removes all processing residues. Each part undergoes 100% dimensional inspection and visual examination. Sealed ends are 100% tested via helium leak detection or pressure decay testing.
Implantable Drug Delivery Systems: As a fluid conduit or port needle for insulin pumps, intrathecal drug delivery systems, or other implantable devices, where a sealed end, a specific bevel for membrane penetration, and permanent identification are required.
High-Pressure Chromatography (HPLC/UHPLC): As a custom needle or transfer line with a sealed end for pressure integrity, a reduced diameter for fitting into narrow ports, a beveled tip for septum piercing, and marked for traceability.
Analytical & Diagnostic Sensor Probes: Sheaths for in-vivo or in-line sensors (e.g., blood gas, glucose) where a sealed tip protects the sensor, a necked section allows for mounting, and a matte finish reduces light reflection.
Micro-Surgical & Biopsy Tools: Components for specialized handpieces where the capillary acts as a guide or channel, featuring a sharp bevel for entry, a sealed proximal end, and marked for size identification.
Laboratory Fluidic Manifolds: Custom connectors or injection ports within complex micro-fluidic setups.
| Category | Parameter | Specification / Details |
|---|---|---|
| Material | Grade | 316L Stainless Steel (UNS S31603 / 1.4404). Vacuum Melted (316LVM) optional. |
| Certification | ASTM A269. Mill Test Report (MTR) with full traceability. | |
| Base Tubing | Starting Outer Diameter (OD) | 0.3 mm to 3.0 mm |
| Starting Inner Diameter (ID) | 0.1 mm to 2.0 mm | |
| Wall Thickness | 0.1 mm to 0.5 mm | |
| Forming Operations | Diameter Reduction (Necking) | Up to 50% reduction in OD. Minimum necked OD ~0.2 mm. Position tolerance: ±0.1 mm. |
| End Sealing Method | Primary: Cold-formed Dome (for smaller IDs). High-Integrity: Orbital Micro-Weld. | |
| Seal Integrity | Helium Leak Rate: < 1 x 10⁻⁹ atm·cc/sec (for welded seals). | |
| Tip Geometry | Bevel Type | Standard Short Bevel (for piercing) or Specialty Grind. |
| Bevel Angle | 20° (Standard), 15° (Sharper), 30° (More durable). Tolerance: ±2°. | |
| Bevel Length | 1.5 to 4 times the wall thickness. | |
| Surface Treatment | Sandblasting Media | White Aluminum Oxide or Glass Bead (for highest purity applications). |
| Final External Finish (Ra) | 1.6 - 3.2 µm (Uniform Satin/Matte). | |
| Passivation | ASTM A967, Method for 316L (Citric or Nitric Acid). Certificate provided. | |
| Marking | Technology | Fiber Laser Annealing/Engraving. |
| Marking Legibility | High contrast on blasted surface. Resistant to solvents and sterilization. | |
| Minimum Character Height | 0.3 mm. | |
| Dimensional Tolerances | Overall Length | ± 0.1 mm (for short parts) to ± 0.5 mm. |
| Reduced Section OD | ± 0.02 mm | |
| Concentricity (TIR) | < 0.05 mm for critical sections (e.g., necked area relative to base OD). | |
| Performance & Compliance | Pressure Rating | Design and seal-dependent. Can be pressure tested to specification (e.g., 5000 psi). |
| Fluid Contact Surface | Internal: Can be electropolished to Ra < 0.4 µm (optional). External: Passivated. | |
| Biocompatibility | 316L material and processes support ISO 10993 evaluation for intended use. | |
| Cleanliness | Cleaned to meet ISO 13485 or customer-specified particle/bioburden levels. | |
| Quality Assurance | Inspection | 100% dimensional, 100% visual, 100% seal integrity test. |
| Documentation | Certificate of Conformance (CoC), Dimensional Report, MTR, Passivation Report, Leak Test Certificate (if applicable). |
Address
Room 203, Building 2, Ande Alley, Changan Town, Dongguan City, Guangdong Province
Tel
86--13267262720
