WELLELE extruded polyimide tubing is a one-piece, non-wound PI construction for sensors, thermistors, test equipment, precision instruments and high-density electronics. Industrial custom capability includes IDs of approximately 0.1-50 mm and wall thicknesses of approximately 0.015-0.35 mm, with exact feasibility determined by size, tolerance, length and material system.
Extruded PI tubing is often called seamless because it has no film overlap. That description does not mean zero leakage or automatic pressure-tight performance. Fluid or pressure service must be validated with the actual medium, pressure, temperature, wall and connection method.
| Requirement | Extruded PI direction | Review |
|---|---|---|
| Controlled lumen for wire or probe insertion | Strong fit | Minimum ID and cut-end openness |
| Long coil or continuous length | Possible by size | Dimensional trend and packaging |
| No wound overlap | Strong fit | Do not equate with leak-proof |
| Very thin coating-built wall | Compare dip coating | Wall, surface and pinhole needs |
| Large film-based sleeve | Compare spiral winding | ID, wall build and seam acceptance |
Extruded polyimide tubing is a one-piece PI tube construction used when the application requires a non-wound structure, controlled lumen geometry and stable dimensional performance.
It is typically reviewed for sensors, thermistors, thermocouples, high-density wiring, precision instruments, electronic components and selected capillary applications where ID, OD, wall thickness and cut-end quality must be controlled.
Choose extrusion when lumen geometry and a non-wound construction are more important than a film-wound structure.
No spiral or axial winding seam
Suitable for applications where ID is critical
Useful for compact assemblies and mico spaces
Can be reviewed for sample, short length or continuous supply
Suitable for sensors, wiring, probes and instruments
ID0.003″ up, OD, wall thickness and length reviewed by project
Is extruded polyimide tubing the same as seamless PI tube?
In many purchasing contexts, extruded polyimide tubing is described as seamless because it is not made by film winding. However, leak-proof or pressure-tight performance must be tested separately.
What is the available size range?
Industrial custom capability covers approximately 0.1-50 mm ID and 0.015-0.35 mm wall across the extruded PI family. Not every ID, wall, tolerance and length combination is possible; the drawing and application are reviewed together
WCan extruded PI tube be supplied in long coils?
Long-coil supply can be reviewed by size, wall thickness, tolerance and packaging requirement.
What causes lumen blockage or cut-end collapse?
Possible causes include thin wall, small ID, cutting method, blade condition and unsupported tube during cutting.
Engineering recommendation
Select extruded polyimide tubing from the complete component dimensions, operating conditions, manufacturing process and acceptance criteria. Use samples to confirm fit and function before volume production.
Dip-Coated Polyimide Tubing
Flat-Wound Polyimide Tubing
Spiral-Wound Polyimide Tubing
PI Tubing for Medical Equipment & In-Vitro Applications
Dip-Coated Polyimide Tubing