Fiberglass round tubes and tubing (FRP)
Circular hollow section pultruded fiberglass tubing from 25 mm to 150 mm OD, for handrails, guardrails, masts and conduit. The dimensions define a structural section, not a pressure rating.
- A
- 1,399 mm²
- Ix
- 85.5 cm⁴
- Mass
- 2.1 kg/m
Overview
Pultruded FRP round tubes are members in handrail systems, guardrails and structures that need a circular section; the smooth bore also suits conduit. Electrical and corrosion performance depend on the specified laminate, the exposure and the complete assembly, and catalog tube data do not qualify a finished safety system.
GRP tube for structural applications
GRP tube and fiberglass round tubing refer to the glass-reinforced pultrusions in this range. Select outside diameter, wall thickness and resin against the design load. Structural tube dimensions do not establish a pressure rating; pressure pipe needs a separately qualified specification. FRP, GRP and GFRP explained
- EN 13706 E23
- Handrails and guardrails
- Smooth bore
- 6 m lengths or cut to size
Sizes 17 catalog sizes
| Model | Drawing and quote | |||||
|---|---|---|---|---|---|---|
| CHS 25×3 | 25≈ 0.984 in | 3≈ 0.118 in | 0.3 | 1.278 | 1.022 | DXFQuote |
| CHS 32×3 | 32≈ 1.260 in | 3≈ 0.118 in | 0.4 | 2.904 | 1.815 | DXFQuote |
| CHS 38×3.2 | 38≈ 1.496 in | 3.2≈ 0.126 in | 0.5 | 5.341 | 2.811 | DXFQuote |
| CHS 42×4 | 42≈ 1.654 in | 4≈ 0.157 in | 0.7 | 8.715 | 4.15 | DXFQuote |
| CHS 50×4 | 50≈ 1.969 in | 4≈ 0.157 in | 0.9 | 15.41 | 6.162 | DXFQuote |
| CHS 50×5 | 50≈ 1.969 in | 5≈ 0.197 in | 1.1 | 18.11 | 7.245 | DXFQuote |
| CHS 60×5 | 60≈ 2.362 in | 5≈ 0.197 in | 1.3 | 32.94 | 10.98 | DXFQuote |
| CHS 63.5×6.4 | 63.5≈ 2.500 in | 6.4≈ 0.252 in | 1.7 | 47.38 | 14.92 | DXFQuote |
| CHS 70×5 | 70≈ 2.756 in | 5≈ 0.197 in | 1.6 | 54.24 | 15.5 | DXFQuote |
| CHS 76×6.4 | 76≈ 2.992 in | 6.4≈ 0.252 in | 2.1 | 85.45 | 22.49 | DXFQuote |
| CHS 80×5 | 80≈ 3.150 in | 5≈ 0.197 in | 1.8 | 83.2 | 20.8 | DXFQuote |
| CHS 80×7 | 80≈ 3.150 in | 7≈ 0.276 in | 2.5 | 107.9 | 26.98 | DXFQuote |
| CHS 89×6.4 | 89≈ 3.504 in | 6.4≈ 0.252 in | 2.5 | 142.5 | 32.02 | DXFQuote |
| CHS 100×6 | 100≈ 3.937 in | 6≈ 0.236 in | 2.7 | 196.5 | 39.3 | DXFQuote |
| CHS 114×6.4 | 114≈ 4.488 in | 6.4≈ 0.252 in | 3.3 | 314.2 | 55.12 | DXFQuote |
| CHS 127×6.4 | 127≈ 5.000 in | 6.4≈ 0.252 in | 3.7 | 442.1 | 69.62 | DXFQuote |
| CHS 150×8 | 150≈ 5.906 in | 8≈ 0.315 in | 5.4 | 902.4 | 120.3 | DXFQuote |
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
Properties
Standard laminate · EN 13706 E23
| Property | Value | Test method |
|---|---|---|
| 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 |
Values of the isophthalic polyester laminate every datasheet lists. Moduli and strengths are the EN 13706-3 E23 minimums; ILSS is published above the 25 MPa minimum. Transverse strength is much lower than longitudinal, so connections need their own check. Full property table and test methods
Resin options
- Isophthalic polyesterStandard laminate for general structural use. Not fire-retardant.
- Fire-retardant polyesterFor an ASTM E84 Class 1 requirement in mild chemistry; the test report is issued per profile.
- Vinyl esterChemicals, seawater and wastewater; fire-retardant with low smoke.
- PolyurethaneTough matrix for thin walls and impact.
- PhenolicFire-critical enclosed spaces: low flame spread, smoke and toxicity.
All are declared to grade E23. Resin decides chemical and fire performance, not stiffness. Compare resin systems
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-stabilised polyester
ApplicationFRP chemical plant platformsFRP round tubes and square tubes for handrails and guardrails.
Documents
- 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
Environmental Product Declaration and product carbon footprint analysis for F1 Composite 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.
- 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 9001:2015 Certificate
- For
- All products
Request the current quality-management certificate 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.
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, antenna masts, conduits and insulating stand-offs. Their low density, resin-selected corrosion resistance and dielectric material properties can suit marine, chemical and electrical service, but the finished assembly, exposure and any metal hardware still require project review.
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.
Quote FRP round tubes
Send the size, length and quantity, the service environment and the destination. We reply within one business day; a formal quotation follows once the specification and delivery are reviewed.
- Lengths & tolerances
- Catalog sections come in 6 m lengths or cut to your length. Give the piece length and count, say whether ASTM D3917 or EN 13706 tolerances apply, and mark any tighter tolerances, holes or end cuts on the drawing.
- Resin & surface
- Polyester suits general structural use; vinyl ester is the usual choice for chemicals, seawater and wastewater. Tell us the chemicals, concentration, temperature, outdoor exposure, color and any fire requirement, and we will confirm the resin and surface veil.
- Quantity & samples
- Catalog sections ship in 2–4 weeks. Give the trial quantity and the expected repeat demand; minimum quantities and samples are confirmed for the section and resin you choose.
- Documents & delivery
- Each production batch ships with a mill test certificate. Include the destination and target date, and we will quote FOB or DDP with the packing method and shipping schedule.