Medical Stainless Steel Pipes

• ​Introduction

Medical stainless steel pipes are specialized tubular products designed for use in healthcare and medical applications. They are manufactured to meet strict hygiene, biocompatibility, and performance standards, ensuring safety and reliability in contact with human tissues, fluids, or pharmaceutical substances. These pipes are widely used in medical devices, surgical instruments, drug delivery systems, and diagnostic equipment.

• ​Main Functions

Fluid Conveyance: Transporting liquids such as blood, drugs, and saline solutions in infusion sets, hemodialysis machines, and surgical tools.

Structural Support: Serving as components in medical devices (e.g., endoscopes, laparoscopic instruments) and implantable structures.

Sterilization Compatibility: Withstanding high-temperature autoclaving, chemical disinfection, and radiation sterilization without degradation.

Precision Channel: Providing a smooth, contamination-resistant pathway for minimally invasive procedures (e.g., catheters, guide wires).

• ​Tubing Standards

ISO 1127，ISO 5832-1； ASTM A269，，ASTM A270，ASTM F2181 ; EN 10216-5，EN 10305-1； GB/T 14976.

• ​Material & Performance

Common Materials: Austenitic stainless steels (e.g., 304, 316, and 316L). 316L is preferred for its superior corrosion resistance (low carbon content) and enhanced biocompatibility, suitable for long-term implantable devices.

Key Performance Traits:

Biocompatibility: Non-toxic, non-allergenic, and non-carcinogenic, compliant with ISO 10993.

Corrosion Resistance: Resistant to bodily fluids, disinfectants (e.g., alcohol, chlorine), and saline solutions.

Mechanical Properties: High tensile strength, ductility, and fatigue resistance; easy to fabricate (bend, weld, or polish).

Surface Finish: Ultra-smooth (Ra ≤ 0.8μm) to minimize bacterial adhesion and facilitate cleaning.

• ​Manufacturing Process

Raw Material Selection: High-purity stainless steel billets (e.g., 316L) with strict chemical composition control.

Forming: Hot rolling/cold rolling to produce rough tubes, followed by cold drawing for precision dimensions (OD/ID tolerance: ±0.01mm).

Heat Treatment: Annealing to eliminate internal stress and improve ductility.

Surface Treatment: Electropolishing or mechanical polishing to achieve a mirror-like finish (Ra ≤ 0.4μm).

Precision Machining: Cutting, bending, or flanging to meet device-specific designs.

Quality Inspection: Non-destructive testing (ultrasonic/eddy current), dimensional verification, and cleanliness testing (particle count < 100 particles/100mL).

• Specifications