
Find dimensions and operating data.
Review supplier documentation.
Prepare your tubing requirements.
Discuss your application with us.
Find the Tubing That Fits Your Requirements.

PA6 Nylon Tubing

PA12 Nylon Tubing

Polyether Tubing

FEP Tubing

PFA Tubing
Explore the full range
View material specifications →Not sure where to start? Send us the material, size and operating conditions you have in mind.
Request a QuoteMATERIALS & CUSTOM TUBING
Virgin Materials. Sizes Made to Your Requirements.
We manufacture our tubing with virgin materials, without recycled feedstock. This material commitment applies across our product range, including standard and custom sizes.
Send us your dimensions and intended operating conditions. We will review the request and confirm the available manufacturing options before you place an order.
Tell Us What You Need.
• Material or tubing type
• Outer diameter and inner diameter
• Dimensional tolerances, if specified
• Required length and order quantity
• Operating pressure and temperature
• Conveyed medium or intended use
• Applicable standards or other requirements
Already have a specification sheet or drawing? Include it with your inquiry.
Start with the job the tubing needs to do
One Manufacturing Partner for Your Tubing Requirements.
Founded in 2005, we moved our production base to Lujiang, Hefei in 2016. The factory runs 12 extruders and coiling lines, with in-house mold machining, supported by dimensional inspection, so specification review, sampling, production and delivery stay with one manufacturer.

YUANNAI TUBE is the name we use for our international business. AIR PASSAGE is our product trademark, owned by Hefei Yuannai Pneumatic Equipment Co., Ltd.
Clear Specification Before Production.
Multiple Materials. One Manufacturing Partner.
Standard & Custom Sizes.
OUR DEVELOPMENT TIMELINE
Today
A Broader Tubing Range — Multiple materials and specialty tubing, with standard and custom size options.
Certificates & test reports
HOW TO GET STARTED
From Your Requirements to a Confirmed Specification.
01 — Share Your Requirements
Send us the tubing type, dimensions, quantity and intended operating conditions.
02 — Review the Details
We review the request with you and clarify any material, dimensional or application questions.
03 — Confirm the Specification
Confirm the agreed specifications, quotation and order details before production.
04 — Proceed with Your Order
Once the details are agreed, we arrange production and delivery according to the confirmed order.
Latest articles

Industrial Tubing Failure: 8 Causes and Checks

Pneumatic Tubing Color Code: Is There a Standard?

Why Air Tubing Kinks and How to Stop It
FREQUENTLY ASKED QUESTIONS
Your Tubing Questions, Answered.
Do you use recycled materials?
+
No. We use virgin materials without recycled feedstock. This has been our material commitment since our beginnings in 2005.
What tubing types do you offer?
+
Our core range is PA6 and PA12 nylon, polyether, FEP and PFA tubing, alongside PU, PE, high-pressure composite and flame-retardant tubing.
Are you a manufacturer or a trading company?
+
We are a manufacturer. YUANNAI TUBE was founded in 2005 and produces tubing at its base in Lujiang, Hefei, Anhui, with extrusion and coiling lines, dimensional inspection and inspection records for each order. You can review our certificates and the manufacturing and inspection process on our About page.
Can you manufacture custom tubing sizes?
+
Yes. Send us your required outer diameter, inner diameter, length and quantity. We will review your request and confirm the available options.
What information do you need for a quote?
+
Please tell us the material or tubing type, outer and inner diameter, length, quantity, operating pressure and temperature, and the medium. A drawing or specification sheet is helpful if you have one.
Which standards or documents can you support?
+
If your project requires a particular standard or supporting documents, tell us when you inquire. We will confirm what applies to the requested product.
What is the relationship between YUANNAI TUBE and AIR PASSAGE?
+
YUANNAI TUBE is the name we use for our international business. AIR PASSAGE is our product trademark, owned by Hefei Yuannai Pneumatic Equipment Co., Ltd.
Let’s Discuss Your Tubing Requirements.
Looking for a standard size or a custom specification? Send us the details, and we will review the available options with you.






