PEEK tubing is a high-performance thermoplastic tube widely used in HPLC systems, analytical instruments, medical devices, semiconductor equipment, and fluid handling applications. Thanks to its excellent chemical resistance, high purity, and mechanical strength, PEEK tubing has become an ideal alternative to stainless steel and PTFE tubing in many precision applications.
PEEK tubing (Polyether Ether Ketone tubing) is available in various diameters and wall thicknesses, including micro tubing and capillary tubing for ultra-low flow applications. It offers:
Excellent chemical resistance
High temperature resistance up to 260°C
High pressure capability
Biocompatibility and low extractables
Excellent wear resistance
Lightweight and metal-free construction
PEEK tubing is commonly used in HPLC chromatography, analytical instruments, medical catheters, semiconductor fluid systems, and laboratory applications.
One of the major advantages of PEEK tubing is the wide range of available dimensions. Standard PEEK tubing sizes include:
| Outer Diameter (OD) | Inner Diameter (ID) |
| 1/32" (0.8 mm) | 0.005"–0.020" |
| 1/16" (1.6 mm) | 0.005"–0.040" |
| 1/8" (3.2 mm) | 0.020"–0.080" |
| 1/4" (6.35 mm) | Customized |
| Metric Sizes | Customized |
Popular micro sizes include:
OD 1.6 mm × ID 0.13 mm
OD 1.6 mm × ID 0.25 mm
OD 1.6 mm × ID 0.50 mm
OD 1.6 mm × ID 0.75 mm
OD 1.6 mm × ID 1.0 mm
Custom lengths and dimensions are also available according to application requirements.
PEEK capillary tubing is designed for extremely low dead volume and precise fluid transfer. Compared with metal capillaries, PEEK capillary tubes provide:
Metal-free flow paths
Excellent solvent compatibility
High pressure resistance
Reduced sample adsorption
Superior flexibility
PEEK capillary tubing is widely used in:
HPLC and UHPLC systems
Liquid chromatography
Mass spectrometry
Biomedical instruments
Microfluidic devices
Chemical analysis equipment
Many laboratories use different PEEK tubing color codes for easy identification. Typical color coding may represent different internal diameters:
| Color | Typical ID |
| Red | 0.005" |
| Yellow | 0.007" |
| Blue | 0.010" |
| Green | 0.020" |
| Orange | 0.030" |
| Natural | Customized |
Color-coded PEEK tubing helps users quickly identify flow paths and minimize installation errors in HPLC systems. Custom color options are also available from PEEK tubing suppliers.
PEEK Tubing HPLC systems require tubing with high purity and excellent chemical resistance. PEEK tubing has become the preferred material for:
HPLC and UHPLC instruments
Chromatography columns
Sample loops
Solvent delivery systems
Injection valves
Flow restrictors
Bio-pharmaceutical analysis
Compared with stainless steel tubing, PEEK tubing eliminates metal ion contamination and improves compatibility with aggressive solvents and biological samples.
Professional PEEK tubing suppliers should provide:
Micro tubing, capillary tubing, and custom dimensions.
Virgin PEEK materials with excellent consistency.
Tight tolerances and smooth internal surfaces.
Natural, black, blue, red, yellow, and other color-coded options.
Solutions for HPLC, medical, semiconductor, and industrial applications.
Customized lengths and rapid production capabilities.
Compared with PTFE, stainless steel, and other engineering plastics, PEEK tubing offers:
✓ Continuous service temperature up to 260°C
✓ Outstanding chemical resistance
✓ High pressure capability
✓ Excellent dimensional stability
✓ Low extractables and high purity
✓ Lightweight and corrosion-resistant
✓ Suitable for HPLC and analytical instruments
✓ Available in various PEEK tubing sizes and capillary configurations
PEEK tubing has become the preferred solution for high-performance fluid handling systems. Whether used as micro tubing, capillary tubing, or standard tubing in HPLC applications, PEEK provides exceptional chemical resistance, dimensional stability, and reliability. Choosing experienced PEEK tubing suppliers ensures access to a complete range of PEEK tubing sizes, color-coded options, and customized solutions for demanding analytical and industrial applications.
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