Fiberglass round tubes and tubing (FRP)
Circular hollow section pultruded fiberglass tubing from 25 mm to 150 mm OD, for handrails, guardrails and masts. Compare outside diameter and wall, then specify the bore fit, cut lengths and connection details for your project.
- A
- 1,399 mm²
- Ix
- 85.5 cm⁴
- Mass
- 2.1 kg/m
Specify the tube and its supply scope
Pultruded FRP round tubes suit members that need a circular grip or cross-section, including handrails, guardrails and masts. State whether you need tube lengths or finished parts with cutting, holes and end treatment. Start with the member load and connections, then select the diameter, wall and laminate. For flat mounting faces or frame joints, compare the square and rectangular tube range.
GRP tube for structural applications
GRP tube and fiberglass round tubing refer to the glass-reinforced pultrusions in this range. Pressure pipe needs a separately qualified specification. For electrical conduit or an insulating equipment part, provide the applicable product standard, voltage duty, environment and assembly details; a hollow shape or material property alone does not qualify the finished part. FRP, GRP and GFRP explained
Comparing materials for a lightweight member? Compare carbon fiber and fiberglass tubes. Carbon may suit high axial stiffness and low moving mass; fiberglass may suit cost-sensitive designs and electrical insulation needs. Compare the actual laminate, loads and connections, and qualify any electrical duty for the finished assembly.
- E23 material reference
- Handrails and guardrails
- Smooth bore
- 6 m lengths or cut to size
Select nominal dimensions and units 17 catalog sizes
| Model | Drawing and quote | |||||
|---|---|---|---|---|---|---|
| CHS 25×3Internal catalog ref: f1-rt-001 Material dataset: E23-ISO | 25≈ 0.984 in | 3≈ 0.118 in | 0.3 | 1.278 | 1.022 | DocumentsDXFQuote |
| CHS 32×3Internal catalog ref: f1-rt-002 Material dataset: E23-ISO | 32≈ 1.260 in | 3≈ 0.118 in | 0.4 | 2.904 | 1.815 | DocumentsDXFQuote |
| CHS 38×3.2Internal catalog ref: f1-rt-003 Material dataset: E23-ISO | 38≈ 1.496 in | 3.2≈ 0.126 in | 0.5 | 5.341 | 2.811 | DocumentsDXFQuote |
| CHS 42×4Internal catalog ref: f1-rt-004 Material dataset: E23-ISO | 42≈ 1.654 in | 4≈ 0.157 in | 0.7 | 8.715 | 4.15 | DocumentsDXFQuote |
| CHS 50×4Internal catalog ref: f1-rt-005 Material dataset: E23-ISO | 50≈ 1.969 in | 4≈ 0.157 in | 0.9 | 15.41 | 6.162 | DocumentsDXFQuote |
| CHS 50×5Internal catalog ref: f1-rt-006 Material dataset: E23-ISO | 50≈ 1.969 in | 5≈ 0.197 in | 1.1 | 18.11 | 7.245 | DocumentsDXFQuote |
| CHS 60×5Internal catalog ref: f1-rt-007 Material dataset: E23-ISO | 60≈ 2.362 in | 5≈ 0.197 in | 1.3 | 32.94 | 10.98 | DocumentsDXFQuote |
| CHS 63.5×6.4Internal catalog ref: f1-rt-008 Material dataset: E23-ISO | 63.5≈ 2.500 in | 6.4≈ 0.252 in | 1.7 | 47.38 | 14.92 | DocumentsDXFQuote |
| CHS 70×5Internal catalog ref: f1-rt-009 Material dataset: E23-ISO | 70≈ 2.756 in | 5≈ 0.197 in | 1.6 | 54.24 | 15.5 | DocumentsDXFQuote |
| CHS 76×6.4Internal catalog ref: f1-rt-010 Material dataset: E23-ISO | 76≈ 2.992 in | 6.4≈ 0.252 in | 2.1 | 85.45 | 22.49 | DocumentsDXFQuote |
| CHS 80×5Internal catalog ref: f1-rt-011 Material dataset: E23-ISO | 80≈ 3.150 in | 5≈ 0.197 in | 1.8 | 83.2 | 20.8 | DocumentsDXFQuote |
| CHS 80×7Internal catalog ref: f1-rt-012 Material dataset: E23-ISO | 80≈ 3.150 in | 7≈ 0.276 in | 2.5 | 107.9 | 26.98 | DocumentsDXFQuote |
| CHS 89×6.4Internal catalog ref: f1-rt-013 Material dataset: E23-ISO | 89≈ 3.504 in | 6.4≈ 0.252 in | 2.5 | 142.5 | 32.02 | DocumentsDXFQuote |
| CHS 100×6Internal catalog ref: f1-rt-014 Material dataset: E23-ISO | 100≈ 3.937 in | 6≈ 0.236 in | 2.7 | 196.5 | 39.3 | DocumentsDXFQuote |
| CHS 114×6.4Internal catalog ref: f1-rt-015 Material dataset: E23-ISO | 114≈ 4.488 in | 6.4≈ 0.252 in | 3.3 | 314.2 | 55.12 | DocumentsDXFQuote |
| CHS 127×6.4Internal catalog ref: f1-rt-016 Material dataset: E23-ISO | 127≈ 5.000 in | 6.4≈ 0.252 in | 3.7 | 442.1 | 69.62 | DocumentsDXFQuote |
| CHS 150×8Internal catalog ref: f1-rt-017 Material dataset: E23-ISO | 150≈ 5.906 in | 8≈ 0.315 in | 5.4 | 902.4 | 120.3 | DocumentsDXFQuote |
Outside diameter (OD)
Use the table OD to shortlist a section. For a clamp or external fitting, send the mating dimensions and required fit with the drawing.
Inside diameter (ID) and wall
Nominal ID = OD − 2 × wall. If an insert or sleeve must fit, specify the required clearance and tolerances; calculated ID is not an inspected bore dimension.
Cut length and end details
List finished length and quantity for each part. Mark end angles, hole positions, inserts and cut-edge treatment, and identify dimensions that control assembly fit.
The internal catalog references identify nominal cross-sections on this website, not manufacturer SKUs or mold numbers. Each row uses its displayed default material dataset and published catalog mass; another resin needs its own mass and evidence review. No public report is mapped to an exact round-tube and formulation combination. Check evidence scope.
Catalog dimensions identify standard section options, not live inventory. Confirm tooling, material, quantity and production timing in the quotation.
Allowable loads by spanA different size or an exact inch dimension: send a drawing
Match the drawing and reports to the selected tube
Open the round-tube evidence packageto review available references and items still to confirm. Identify the section and formulation where known; another resin or a similar diameter does not inherit an approval. Use the size row's Quote link to carry its catalog configuration into the inquiry.
- Data sheet17 sizes · web page
Round tube datasheets
- Issued by
- F1 Composite
One page per size: dimensions, calculated section properties, E23 laminate data and, where published, allowable load by span.
- CADDXF · 17 sizes
Round tube section drawings
- Issued by
- F1 Composite
Dimensioned cross-sections that open in AutoCAD, DraftSight or LibreCAD. Download one from its row in the size table; no login or email.
- Data sheetPDF · 3 MB
FRP Profile Design Manual — DOC-PF-2026-EN Rev. B
- Issued by
- F1 Composite
- For
- Structural shapes
Revision B (October 2026), generated from the website's catalog, laminate and design-basis data: EN 13706 E23 laminate values beside the grade minimums, section properties of all 114 catalog sizes, allowable uniform loads to the published LRFD screening basis, application guides, durability stated by resin formulation, fabrication and inspection. A preliminary-sizing reference, not a project approval or batch certificate; it supersedes the withdrawn Rev. A.
- CertificatePDF · 142 KB
EPD & Carbon Footprint — Pultruded GFRP Composite Profiles
- Issued by
- CABR
- For
- Standard profiles
Unofficial English summary of the environmental product declaration and carbon footprint analysis for pultruded GFRP composite profile products, with 1 m² functional unit. Calculation reference CABR-CFC-01(02)-2025(20030)1, cradle-to-gate 33,934.34 g CO₂e/m², distribution 254.59 g, cradle-to-grave 36,099.32 g. Standards: GB/T 24025-2009 (ISO 14025-aligned Type III EPD), GB/T 32161-2015, ISO 14067, PAS 2050. Issued by China Academy of Building Research Co., Ltd. (CABR) Certification Center on April 30, 2025. The original Chinese documents, with the holder and scope, are provided on request.
- CatalogOn request
Product Catalog 2024
- Issued by
- F1 Composite
- For
- All products
Complete catalog of standard pultruded FRP profiles with dimensions, properties, and ordering information.
- CertificateOn request
ISO 9001 Certificate
- For
- All products
Request the current quality-management certificate with its edition (ISO 9001:2015, or ISO 9001:2026 after transition), holder, validity and scope for your proposed supply.
- CertificateOn request
CE Declaration of Performance
- For
- All products
Request product-specific performance and applicable conformity documentation; confirm the intended use and assessment route.
Review the material basis and load case
Material reference · E23-ISO
Published reference values for the general-purpose isophthalic polyester laminate. Match the section, formulation and supporting documents before selecting design values for an order.
| Property | Reference value | Method reference |
|---|---|---|
| Tensile modulus (longitudinal)EN ISO 527-4 | 23 GPa | EN ISO 527-4 |
| Tensile modulus (transverse)EN ISO 527-4 | 7 GPa | EN ISO 527-4 |
| Tensile strength (longitudinal)EN ISO 527-4 | 240 MPa | EN ISO 527-4 |
| Flexural strength (longitudinal)EN ISO 14125 | 240 MPa | EN ISO 14125 |
| Interlaminar shear strength (ILSS)EN ISO 14130 | 30 MPa | EN ISO 14130 |
| Pin-bearing strength (longitudinal)EN 13706-2 Annex E | 150 MPa | EN 13706-2 Annex E |
| DensityEN ISO 1183 | 1.9 g/cm³ | EN ISO 1183 |
| Glass contentEN ISO 1172 | 65–70% by weight | EN ISO 1172 |
The listed moduli, tensile and flexural strengths, and pin-bearing strength use EN 13706-3 E23 minimums. ILSS, density and glass content are the published E23-ISO material references. These values and method names do not constitute a test report for the selected profile. Full property table and test methods
Resin routes to review
- Isophthalic polyesterThe E23-ISO reference uses this resin family. Confirm its suitability for the profile and service conditions.
- Fire-retardant polyesterState the required fire test and classification, then confirm evidence for the offered formulation and specimen scope.
- Vinyl esterA candidate for chemical exposure. Provide the chemicals, concentrations, temperatures and exposure duration; specify fire requirements separately.
- PolyurethaneReview the proposed profile, processing route and mechanical requirements with the supplier.
- PhenolicA route to evaluate where fire, smoke or toxicity criteria apply. Confirm manufacturability and the relevant test evidence.
A change of resin, reinforcement, pigment or surface finish can change the applicable properties and evidence. Confirm the grade and reports for the offered configuration. Compare resin systems
Define the finished part and its inspection
For cut or drilled tubing, supply a part drawing with its revision, units, cut list and hole or end details. Locate features from agreed datums and identify the bore, sleeve or clamp fit that controls assembly. Separate nominal tube dimensions from the limits required on the finished part.
Agree measurement setup, edge treatment, sampling and any first-article fit check before production. A drawing requirement or blank inspection sheet is not an inspected result.
Prepare cutting and machining requirementsPlan the inspection record
Applications
Case study · Project photoFactory access staircaseA bolted FRP stair in our Chongqing plant, assembled by four people with hand tools: no welding, hot work or crane.Profiles used Round tube handrails in UV-stabilized polyester
ApplicationFRP chemical plant platformsFRP round tubes and square tubes for handrails and guardrails.
Questions buyers ask
Can I order fiberglass tubing cut to length?
Include finished length per piece, piece count, end cuts or holes, and tolerances with your selected section. We review the cutting and machining scope, material and packing before confirming the quotation. Catalog dimensions are section options, not a live stock list.
What is the minimum order quantity and lead time?
Minimum quantity and timing are confirmed for the section, resin, tooling and processing required. Send your trial quantity, expected repeat demand, destination and target date. Ask for sample arrangements and production and shipping timing to be listed separately in the quotation.
What are pultruded FRP round tubes used for?
Pultruded FRP round tubes are used as members in handrail systems, structural columns and antenna masts. Select the section, laminate and connections for the loads and exposure. Pressure service, electrical conduit and insulating equipment each need their own specification and qualification; a structural tubing size does not establish those capabilities.
How do I specify the inside diameter of fiberglass tubing?
For a nominal circular tube with a uniform wall, ID = OD − 2 × wall thickness. This is a geometry calculation, not a guaranteed fit. If the tube must accept a sleeve, insert or cable assembly, send the required clearance, mating-part drawing and tolerances for review, including any limits on ovality or straightness.
FRP round tube vs FRP square tube — which should I use?
Round tubing suits circular grips and members such as handrails and masts. Square and rectangular tubing provides flat bearing faces for frames and bolted connections. Compare the actual section properties, laminate, span and load case; the shape name alone does not establish which section is stiffer or stronger. Structural tubing is not a pressure-pipe specification.
Can FRP round tubes be used outdoors with UV exposure?
Outdoor configurations can use a UV-stabilized resin, surface veil and, where specified, a compatible coating. Appearance and mechanical-property retention depend on resin, pigment, surface system, climate and exposure duration, so state the project location and design life and request the applicable weathering evidence.
What's the load capacity of FRP handrail tubes?
A round tube by itself cannot establish the capacity or compliance of a handrail. The complete posts, top and middle rails, fittings, splices, bases, anchors and supporting substrate must be evaluated together against the governing load and deflection criteria. Use the complete fiberglass handrail systems page for the catalog assembly and project-release boundary.
FRP vs steel comparisonSpecify cutting, drilled holes and machining tolerancesDesign guidesWhat is FRP?
Quote FRP round tubes
Send the selected catalog row or a dimensioned drawing, with the bore fit and finished-part requirements. We reply within one business day; a formal quotation follows once the specification and delivery are reviewed.
- OD, ID and wall
- Include units, required clearances and mating-part dimensions. Mark which dimensions and tolerances are critical to fit.
- Cut list and end processing
- Give finished lengths and piece counts, end cuts, holes, inserts and cut-edge treatment. State whether you need plain lengths or processed parts.
- Service and evidence
- Describe loads, supports, chemicals, temperature and outdoor exposure. Identify any fire, pressure or electrical requirements for a separate applicability review.
- Quantity and delivery
- Include trial and repeat quantities, destination and target date. Confirm tooling, material, sample arrangements, inspection documents and production timing in the quotation.