Custom PTFE Tubing

For medical devices, semiconductor equipment, automotive systems, chemical processing equipment, and precision instruments, standard PTFE tubing does not always fit the assembly requirements. A change in any dimension-inner diameter, outer diameter, wall thickness, concentricity, length, bending method, or cross-sectional structure-can affect fluid transfer, assembly clearance, pressure capability, or service life.

Hubei Zetai New Material Co., Ltd. has been engaged in the production of PTFE, FEP, PFA tubing and fluoroplastic products for many years. The website currently features Customized PTFE Tubing and states that OEM/ODM, small-batch trial production, and volume production are supported. The factory has more than 10,000 m² of production facilities, a 2,000 m² cleanroom, multiple extrusion lines, and equipment for medical-grade tubing production.

For customers who need special dimensions, unusual cross-sections, or tubing made from drawings, customization is not simply a matter of cutting a standard tube to length or changing its color. Material selection, tooling, extrusion conditions, and dimensional inspection all have to be controlled together.

WITFLON custom PTFE tubing can be designed around dimensions, tube structure, and post-processing requirements. The existing Customized PTFE Tube page states that PTFE tubing can be produced to customer requirements for dimensions, color, physical form, and end treatment, with OEM/ODM services available.

ID - Inner Diameter

The inner diameter determines the available flow path, guidewire clearance, or space around an internal component. In small-diameter tubing, even a minor change in ID can affect the final assembly.

OD - Outer Diameter

The outer diameter needs to match connectors, sleeves, catheter assemblies, equipment openings, or retaining structures.

Wall Thickness

Wall thickness should be selected according to temperature, pressure, flexibility, mechanical strength, and available installation space. Thin-wall PTFE tubing in particular requires stable extrusion and dimensional control.

Length

Cut-to-length tubing can be supplied to match the equipment design, reducing additional cutting and secondary processing at the customer's facility.

Tolerance

For precision PTFE tubing, WITFLON's existing medical multi-lumen tube product page specifies dimensional tolerances ranging from ±0.03 mm to ±0.05 mm. The actual tolerance should be confirmed according to the product structure, dimensions, and application requirements.

Customers can also specify:

· Color

· Surface Finish

· Hardness

· Material Grade

· Bore Structure

· Multi-Lumen Configuration

· Corrugated Structure

· Heat Shrink Structure

· Braided Structure

These options are not applicable to every product at the same time. For example, multi-lumen tubing integrates several independent passages into one tube, while heat shrink tubing is mainly used for covering, securing, and protecting components.

The cross-section and wall structure of PTFE tubing directly affect how it can be used. WITFLON's existing medical product range already includes multi-lumen tubing, etched liners, thin-wall liners, and zebra heat shrink tubing, showing that its customization scope extends beyond conventional single-lumen tubes.

The most common tube structure, with one continuous internal passage.

Suitable for:

• Fluid transfer
• Wire protection
• Electrical insulation
• Chemical handling
• Laboratory equipment

Several independent passages are formed within a single tube.

WITFLON's existing Medical Custom PTFE Multi-Lumens Tube can be designed from customer drawings, including the number of lumens, lumen dimensions, positions, wall thickness, length, and cross-sectional shape. The current product page also lists 2-lumen, 3-lumen, and higher-count multi-lumen configurations.

Suitable for:

• Catheter systems
• Guidewire passage
• Irrigation
• Gas transmission
• Instrument control

A convoluted structure increases flexibility while retaining PTFE's chemical and temperature resistance.

Suitable for industrial systems that require repeated bending, limited installation space, or additional flexibility.

A spiral structure changes the tube's bending and recovery characteristics and can be used for specific catheter, protection, and connection designs.

The internal passage remains continuous and smooth, making this structure suitable for applications where low friction and consistent fluid transfer are important.

Reducing wall thickness helps lower the overall size and weight while retaining PTFE's chemical and temperature resistance.

Used for covering, insulation, protection, and securing components. WITFLON currently offers PTFE/FEP/PFA Zebra Heat Shrink Tube as well as medical-grade heat shrink products.

Material selection comes first in a custom tubing project. PTFE is not the only option; depending on the operating conditions, PTFE, FEP, or PFA may be more appropriate.

Virgin PTFE

Virgin PTFE is suitable for applications requiring chemical inertness, low friction, resistance to high and low temperatures, and electrical insulation.

WITFLON's existing PTFE product information identifies high chemical stability, low friction, and a broad operating temperature range as key PTFE characteristics. Some product information on the website gives a typical working temperature range of -65°C to 260°C. The actual operating temperature should be confirmed according to the tube structure and working conditions.

Filled PTFE

Adding fillers to PTFE can improve specific properties such as wear resistance, mechanical strength, and dimensional stability.

Examples include:

• Glass fiber
• Carbon
• Bronze

The specific formulation should be confirmed according to the application and production conditions. WITFLON's existing product information also refers to the use of fillers to improve PTFE's mechanical properties.

Modified PTFE

Modified PTFE is used when certain properties of standard PTFE need to be adjusted, such as processing characteristics or dimensional control.

The appropriate modified grade should be determined according to the project requirements.

FEP

FEP is suitable for applications requiring fluoropolymer chemical resistance together with transparency, heat forming, or specific processing characteristics.

WITFLON currently offers a FEP Tube range, including chemical FEP tubing, transparent FEP tube, and FEP tubing in different sizes.

PFA

PFA is suitable for high-purity fluid systems requiring chemical resistance and elevated temperature performance.

For semiconductor and chemical processing applications, the choice between PTFE, FEP, and PFA should be based on the media, temperature, purity requirements, and equipment design rather than material price alone.

WITFLON custom projects can start with a customer drawing or a set of technical specifications.

Customer Drawing / Requirement

Customers can provide:

• 2D drawing
• 3D drawing
• Product sample
• Specification sheet
• ID × OD requirement
• Application description

If a complete drawing is not available, dimensions, material, quantity, and application conditions can be provided first for an engineering feasibility review.

Engineering Review

The engineering team checks:

• ID / OD
• Wall thickness
• Tolerance
• Lumen arrangement
• Material
• Length
• Application temperature
• Working pressure
• Production feasibility

For multi-lumen tubing, the position, dimensions, and cross-sectional relationship of each lumen also need to be confirmed.

Material Selection

PTFE, FEP, or PFA and the corresponding material grade are selected according to the media, temperature, pressure, flexibility, purity requirements, and applicable regulations.

Prototype

For complex structures, samples or small-batch trial production can be used for validation.

This is particularly useful for:

• · Medical tubing
• · Multi-lumen tubing
• · Thin-wall tubing
• · Custom heat shrink tubing
• · Special profile tubing

Sample Inspection

Samples are checked for dimensions and appearance, followed by performance testing where required by the project.

Production

After sample approval, the project moves into volume production.

ZETAI's website currently states that the factory has 26 standard production lines and 15 customized production lines, with a monthly capacity of 120 tons, and reports a first-piece pass rate of 98% or higher.

Final Inspection

Finished tubing is checked for:

• · ID
• · OD
• · Wall thickness
• · Length
• · Surface
• · Structure
• · Appearance
• · Required performance

Packaging

Packaging is selected according to tube dimensions, length, cleanliness requirements, and shipping method.

The existing customized PTFE product information lists:

• · Carton
• · Pallet
• · Wooden Box

Express, air, and sea shipment are also supported.

Shipment

Volume orders are arranged for export shipment according to the customer's order requirements.

A custom PTFE tubing quotation cannot be based on OD or ID alone.

To reduce back-and-forth communication, buyers should provide the following information as early as possible:

For medical multi-lumen tubing, WITFLON currently also asks customers to provide the product drawing, material requirements, tube dimensions, annual demand, and application information.

Before Requesting a Quote

If a complete engineering drawing is not available, at minimum provide:

ID × OD × Wall Thickness × Length + Material + Quantity + Application

For fluid or pressure applications, also include:

Working Pressure + Temperature + Fluid

For medical, automotive, or semiconductor projects, certification, cleanliness, or regulatory requirements should also be stated.

Medical devices are an important application area for WITFLON's custom PTFE tubing.

The website currently features:

· Medical Custom PTFE Multi-Lumens Tube

· Etched Ultra Thin Wall PTFE Liner Catheter

· Medical Etched PTFE Multi-Lumen Tubing

· PTFE Zebra Heat Shrink Tubing

· PTFE Precision Catheter

· PTFE Coated Guide Wire

WITFLON also operates under an ISO 13485 quality management system and has a 2,000 m² cleanroom production environment.

Key areas for medical customization include:

Multi-Lumen

Designing the number, diameter, and position of lumens according to the internal structure of the device.

Thin-Wall Liner

Providing low-friction, chemically resistant liners where internal space is limited.

Etched PTFE Liner

Using surface treatment to improve the bonding conditions between PTFE and other materials.

Heat Shrink Tubing

Used for covering and securing catheter, guidewire, and other medical device components.

Precision Catheter Tubing

Produced according to ID, OD, wall thickness, length, and tolerance requirements.

For medical OEM customers, the page should focus on drawing development, sample approval, dimensional inspection, cleanroom production, and the quality management system, rather than simply repeating phrases such as "high quality medical tubing."

Automotive applications require dimensional stability, temperature resistance, chemical compatibility, pressure capability, and long-term reliability.

WITFLON's website lists automotive among its key application areas, and the company holds IATF 16949 certification.

Custom automotive PTFE tubing can be developed for:

• Brake Systems
• Hydraulic Systems
• Fuel Systems
• Fluid Management
• Sensor Protection
• Electrical Insulation
• EV Systems

For automotive customers, engineering review should focus on:

Tube Size → Temperature → Pressure → Fluid → Bend Requirement → Assembly → Durability

For brake or hydraulic systems, pressure pulses, bend radius, connection method, and external protection should also be confirmed.

Semiconductor equipment places requirements on tubing that go beyond ordinary industrial applications.

The key considerations are often not simply "high temperature," but:

• Chemical Compatibility
• Purity
• Low Contamination
• Dimensional Stability
• Fluid Handling
• Clean Manufacturing

The customization process should therefore confirm:

Chemical → Concentration → Temperature → Pressure → Purity → Tube Size → Connection → Cleanliness

For chemical delivery, wet-process equipment, and high-purity fluid systems, the differences between PTFE, FEP, and PFA should also be evaluated.

Industrial customers have the broadest range of customization requirements. Tubing can be developed according to equipment configuration for:

• Chemical Tubing
• Electrical Insulation Tubing
• Hydraulic Tubing
• High Temperature Tubing
• Vacuum Tubing
• Protective Tubing
• Heat Shrink Tubing
• Corrugated Tubing
• Braided PTFE Hose

WITFLON currently lists applications including aerospace, chemical engineering, automotive, electrical insulation, telecommunications, power engineering, heat exchangers, machinery, environmental equipment, and transformers.

Industrial customization should therefore be based on media, temperature, pressure, available space, and installation method, rather than using a generic statement such as "PTFE is widely used in industry."

If your PTFE tubing cannot be selected directly from standard sizes, send the drawing or technical specifications to WITFLON for engineering review.

Send the Following Information

• Product Type
• ID
• OD
• Wall Thickness
• Length
• Material
• Quantity
• Application
• Working Temperature
• Working Pressure
• Fluid / Media
• Drawing
• Certification Requirement

For Custom Multi-Lumen Tubing

Additional information:

• Number of Lumens
• Lumen ID
• Lumen Position
• Cross-Section Design
• Wall Thickness Between Lumens
• Overall OD
• Required Tolerance

WITFLON's existing medical multi-lumen tube products are already customized according to customer drawings, with OEM medical device projects supported.

Send Your PTFE Tubing Drawing

If a complete drawing is not yet available, you can start with the dimensions, application, and estimated purchasing quantity. For complex medical, automotive, semiconductor, and industrial projects, defining the operating conditions before selecting the material and tube structure is generally more effective than starting with a standard PTFE tube size.