Pultruded FRP square tube (also named fiberglass square hollow profile) is a high-performance structural composite manufactured via continuous pultrusion molding process. We impregnate continuous E-glass roving + surface veil with thermoset resin, pull the fiber bundle through a heated precision die, then fully cure to form uniform hollow square sections with stable wall thickness.

1. Lightweight with High Structural Strength

Lighter than steel and aluminum but delivers reliable tensile and flexural strength. It reduces transportation and installation costs and requires no heavy lifting equipment on site.

2. Excellent Corrosion & Chemical Resistance

Rust-proof, rot-proof, and resistant to saltwater, acids, alkalis, and most industrial chemicals. Ideal for coastal, chemical, wastewater, and farm harsh environments with long outdoor service life.

3. Non-Conductive & Thermal Insulation

100% electrical insulation and non-magnetic. Effectively prevents electric leakage and heat transfer, perfect for power substations, telecom, and electrical infrastructure projects.

4. Zero Maintenance & Long Lifespan

No painting, anti-rust treatment, or regular upkeep needed. Weather-resistant for more than 20 years, greatly lowering overall project maintenance costs.

5. Easy Processing & Flexible Customization

Can be easily cut, drilled, and assembled with standard tools. Multiple sizes, wall thicknesses, colors, and resin grades are available for custom project needs.

6. Optional Fire Retardant Performance

Flame-retardant versions meet UL94 standards with low smoke and non-dripping properties, complying with public and industrial fire safety requirements.

Wide Industry Applications

1. Chemical & Water Treatment

Operation platform railings, equipment support frames, sewage tank brackets, cooling tower structural columns

2. Marine & Coastal Engineering

Dock guardrails, offshore walkway posts, seaside fence supports (salt spray corrosion free)

3. Power & Telecommunication

Substation insulation cross arms, cable channel frames, solar PV mounting brackets

4. Construction & Infrastructure

Building support posts, safety handrails, stair frame, outdoor signage stand, bridge auxiliary structures

5. Agriculture & Horticulture

Greenhouse skeleton, livestock farm fencing, irrigation pipeline supports

6. Industrial Machinery & Workshop

Machine equipment frames, safety isolation barriers, workshop platform support columns

7. Recreation & Public Facilities

Stadium railings, park outdoor frames, playground safety structural parts

Why Choose Us?

1. Factory direct supply with 10+ full-automatic pultrusion lines, fast bulk delivery & stable lead time

2. Complete stock of mainstream standard sizes for immediate shipment; custom mold development for special cross-sections

3. Strict raw material inspection + finished mechanical performance testing before delivery, provide test reports & datasheets

4. Professional engineering team to offer free structural design support and matching FRP fittings (angles, connectors, grating)

5. Global shipping packaging: Pallet wrapped with waterproof film, prevent scratch & damage during sea/land transit

6. Multi-language technical support, fast reply for OEM/ODM wholesale orders, welcome project & distributor cooperation