Pultruded carbon fiber tube smooth die-formed surface side view YTCarbon
Pultruded carbon fiber tube cross section unidirectional fiber YTCarbon
Pultruded carbon fiber tube matte veil surface texture YTCarbon
Pultruded carbon fiber tubes long production run factory YTCarbon

Pultruded Carbon Fiber Tube

Pultruded carbon fiber tubes built for volume production and maximum axial performance. The continuous pultrusion process pulls fiber through a heated die — producing consistent, uniform profiles at speed. All fibers run along the tube length (0° orientation), giving the highest possible longitudinal stiffness and tensile strength. Available in round, square, and rectangular cross-sections. Custom OD/ID from 3mm to 200mm. Single-piece lengths up to 8 meters — one of the longest pultrusion capabilities from any Chinese manufacturer. Factory direct from Shenzhen. ISO 9001 certified.

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Product Details

Pultrusion is the process you pick when you need carbon fiber tubes by the kilometer, not by the meter. Continuous fiber tows are pulled through a resin bath and into a heated die, where the profile cures in one pass — no mandrel wrapping, no vacuum bagging, no batch-by-batch curing. The result is a constant-cross-section tube with all fibers aligned along the 0° axis, delivering the highest longitudinal tensile strength and stiffness per dollar of any carbon fiber tube process. If your application loads the tube primarily in tension or compression along its length — structural rails, push-pull rods, spar caps — pultrusion gives you more strength where you need it for less money.

The trade-off is directional. Because virtually all the fiber runs lengthwise, a pultruded tube is weaker in transverse bending, crushing, and torsion than a roll-wrapped tube of the same dimensions. You can’t tune the ply angles or add hoop reinforcement — the die geometry and pull speed are fixed. If your design needs ±45° shear plies, 90° hoop wraps, or a cosmetic 3K twill outer layer, see our roll wrapped carbon fiber tubes. But for straight, long, axially loaded members where cost-per-meter matters, pultrusion is the right process.

Our Shenzhen pultrusion line produces single-piece tubes up to 4 meters long — one of the longest capabilities among Chinese carbon fiber tube manufacturers. Available cross-sections include round (3mm–200mm OD), square, and rectangular profiles. Wall thickness from 0.5mm to 10mm. The continuous process means every meter of a 50-meter run is dimensionally identical — same OD, same wall, same fiber content. For OEM customers ordering thousands of meters per month, that consistency is worth more than any single-tube strength spec.

Specifications

Specification Details
Material T300/T700/T800 carbon fiber (continuous tow)
Process Pultrusion (continuous die-formed)
Cross-Section Round / Square / Rectangular
Outer Diameter / Side 3mm – 200mm
Wall Thickness 0.5mm – 10mm
Max Single-Piece Length 4000mm (4 meters)
Fiber Orientation 0° (unidirectional, longitudinal)
Surface Veil Polyester veil / lightweight fabric wrap (optional)
Surface Finish Smooth (die-formed) / Matte veil
Fiber Volume Fraction 60–70%
Density 1.55–1.65 g/cm³
Tensile Strength (axial) ≥ 1000 MPa (T700 UD)
Tensile Modulus (axial) ≥ 140 GPa (T700 UD)
Transverse Strength Lower than roll-wrapped (UD orientation)
Operating Temperature -40°C to 120°C

Applications

  • Structural guide rails and tracks — Long, straight runs carrying axial and bending loads. The 0° fiber orientation maximizes stiffness along the rail length while keeping per-meter cost down for production volumes
  • Push-pull rods and linkage bars — Tension and compression members in automation, robotics, and industrial machinery. UD fiber gives the highest axial strength per cross-section of any CF tube process
  • Spar caps and stringers — Aerospace and UAV wing structures where longitudinal stiffness is the primary design driver. Lightweight, consistent, and cost-effective in volume
  • Tent poles and support struts — High-volume, cost-sensitive applications that need carbon fiber’s light weight and stiffness without the premium price of roll-wrapped construction
  • Electrical insulation supports — Carbon fiber’s non-conductive behavior in the transverse direction (with proper veil) makes pultruded tubes suitable for high-voltage standoff applications

Why Choose YTCarbon

  • One plant, full control. We pultrude our own carbon fiber tubes from raw tow, cut, and inspect every piece in the same Shenzhen facility. No trading companies, no batch variance. We exhibited at the 2025 World UAV Expo — see what a real carbon fiber factory puts on the table
  • 4-meter single-piece length. One of the longest pultrusion capabilities among China carbon fiber tube factories. Most competitors max out at 3–5 meters. We go to 8 — fewer joints, fewer failure points, lower assembly cost for your long-span structures
  • Volume pricing that works. Pultrusion is a continuous process — the longer the run, the lower the per-meter cost. We quote by the kilometer for OEM accounts, not by the piece. If you’re buying thousands of meters per month, the price difference vs roll-wrapped is significant
  • Run-to-run consistency. Same die, same pull speed, same resin content. Every meter of a production run is dimensionally and mechanically identical. Critical for OEMs who need to qualify one spec and order it repeatedly
  • T700 axial strength ≥ 1000 MPa. Higher fiber volume fraction than roll-wrapped (up to 70% vs 60–65%) because the die consolidates the laminate under mechanical pressure. More fiber, less resin, more strength per gram

Certifications

Every pultruded carbon fiber tube we ship carries documented quality credentials. Our facility holds ISO 9001 certification for quality management, and our materials are RoHS and CE compliant — required if you’re selling into the EU or supplying customers who need traceable material documentation. Need a copy for your records? Just ask and we’ll send the PDF.

YTCarbon ISO 9001 RoHS CE certifications for pultruded carbon fiber tube

How We Manufacture Your Tube

The pultrusion line runs continuously. Carbon fiber tows are pulled from creels through a resin bath where they’re impregnated with epoxy, then gathered into the entrance of a heated steel die. Inside the die, the resin cures in seconds under heat and pressure — the profile exits the die fully formed and solid. A pulling mechanism grips the cured tube downstream and feeds it at constant speed, while a flying cutter slices it to your specified length without stopping the line. Surface finish comes from the die wall: a polished die produces a smooth, semi-glossy surface; a matte veil can be added as the outermost layer if you need a non-slip texture or want to hide the longitudinal fiber lines. Every production run starts with a first-article inspection — OD, ID, wall thickness, and fiber content are verified before the line runs at speed.

Pultruded carbon fiber tube manufacturing continuous die process at YTCarbon Shenzhen factory

Frequently Asked Questions

+ How strong is a pultruded carbon fiber tube along its length?
T700 at 60–70% volume fraction delivers ≥1000 MPa axial tensile and ≥140 GPa modulus — higher than roll-wrapped at the same grade. The catch is transverse strength: nearly all fibers run lengthwise, so side loads and torsion are significantly weaker.
+ Can a pultruded carbon fiber tube handle bending loads?
Yes for distributed loads as a beam — 0° fibers carry bending stress efficiently. Not ideal for transverse point loads, side impact, or crushing. Bolted connections and clamps load perpendicular to fiber; roll-wrapped with ±45° plies resists local damage better.
+ How does pultrusion cost compare to roll wrapping?
30–50% cheaper per meter at volume. Pultrusion runs continuously with minimal labor; roll wrapping requires hand layup and batch curing. Trade-off: a pultrusion die costs $2,000–$8,000. Under 50 meters roll wrapping is cheaper; over 500 meters pultrusion wins.
+ Can you pultrude carbon fiber tubes longer than 6 meters?
Yes. Our line produces single-piece tubes up to 4 meters — one of the longest among Chinese CF tube manufacturers. Length is limited by shipping, not process. Over 6m we use custom crates with foam supports. Beyond 4m, jointed assemblies with internal sleeves.
+ What surface finish options are available for pultruded tubes?
Default is smooth semi-glossy from the die wall with faint longitudinal fiber lines. A polyester veil adds a matte non-slip texture. For a true 3K twill outer, roll wrapping is required — pultrusion cannot produce woven cosmetic surfaces.

Need a Custom Pultruded Carbon Fiber Tube?

Custom profile, length, wall thickness, and volume pricing. Up to 8 meters single-piece. Factory direct from Shenzhen with first-article inspection data on every order.