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Structural Profiles - Square Tube Profiles (Isophthalic)
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Greenlogy TEC
FRP profiles are a new type of composite material made with glass fiber as reinforcement, resin as adhesive, and glass fiber cloth as a covering reinforcement layer; after full impregnation, they are heated, formed, and cured in a metal mold and pultruded under the traction of a pulling machine. They have good physical properties and are widely used in high-strength, long-span applications.
Type | Size (mm) | Weight (kg/m) | Size (in) | Weight (lbs/in) |
|---|---|---|---|---|
Square Tube Profiles | A*B*T1*T2 | A*B*T1*T2 | ||
| STH50 | 50*50*6.4*5 | 3 | 2" x 2" x 1/4" x 3/16" | 6.61 |
Markets
Construction
Bridges and highways
Chemical
Food and beverage
Manufacturing
Metals and mining
Microelectronics
Oil and gas
Pharmaceutical
Power
Pulp and paper
Leisure
Telecommunications
Transportation
Water and wastewater
Features:
Corrosion resistance
Low maintenance cost
Flame retardant
Low installation cost
Heavy metal resistant
Long service life
Non-conductive and thermally non-conductive
High strength-to-weight ratio (high specific strength)
Raw material introduction — resin types
Code | Resin type | Flame retardant performance | Recommended applications |
|---|---|---|---|
VEFR-25 | Vinyl ester type | Oxygen index 28 and above | Harsh corrosive environments such as acids and alkalis |
IFR-25 | Isophthalic type | Oxygen index 28 and above | An economical VEFR type, resistant to moderate acids, alkalis and solvents |
OFR-25 | Orthophthalic type | Oxygen index 28 and above | General acid and alkali environments |
Applications:
Greenlogy TEC pultruded FRP structural profiles are widely used in various scenarios, combining corrosion resistance, high strength, dimensional stability and light weight, with thermal insulation and electrical insulation properties. Durable Greenlogy TEC profiles provide years of low-maintenance service in areas where steel, aluminum or wood components are traditionally used. Today, these profiles are commonly used in highly corrosive applications that previously required stainless steel and other expensive components.
Greenlogy TEC profiles
Mechanical properties | ASTM | Unit | Value | Unit | Value |
|---|---|---|---|---|---|
Tensile stress, LW | D-638 | psi | 30000 | kgf/m² | 21092086 |
Tensile stress, CW | D-638 | psi | 7000 | kgf/m² | 4921487 |
Tensile modulus, LW | D-638 | 10^6psi | 2.5 | 10^6kgf/m² | 1758 |
Tensile modulus, CW | D-638 | 10^6psi | 0.8 | 10^6kgf/m² | 562 |
Compressive stress, LW | D-695 | psi | 30000 | kgf/m² | 21092086 |
Compressive stress, CW | D-695 | psi | 15000 | kgf/m² | 10546043 |
Compressive modulus, LW | D-695 | 10^6psi | 2.5 | 10^6kgf/m² | 1758 |
Compressive modulus, CW | D-695 | 10^6psi | 1 | 10^6kgf/m² | 703 |
Flexural stress, LW | D-790 | psi | 30000 | kgf/m² | 21092086 |
Flexural stress, CW | D-790 | psi | 10000 | kgf/m² | 7030695 |
Flexural modulus, LW | D-790 | 10^6psi | 1.8 | 10^6kgf/m² | 1266 |
Flexural modulus, CW | D-790 | 10^6psi | 0.8 | 10^6kgf/m² | 562 |
Elastic modulus | Full section | 10^6psi | 2.8 | 10^6kgf/m² | 1969 |
Shear modulus | --- | 10^6psi | 0.45 | 10^6kgf/m² | 316 |
Short beam shear | D-2344 | psi | 4500 | kgf/m² | 3163813 |
Punch shear | D-732 | psi | 10000 | kgf/m² | 7030695 |
Notched Izod impact strength, LW | D-256 | ft.-lbs./in. | 25 | kg/m | 3.46 |
Notched Izod impact strength, CW | D-256 | ft.-lbs./in. | 4 | kg/m | 0.55 |
Excluding round rods and square rods
Physical properties | ASTM | Unit | Value |
|---|---|---|---|
Barcol hardness | D-495 | --- | 45 |
24-hour water absorption | D-570 | % max | 0.45 |
Density | D-792 | lbs./in.³ | 0.062-0.07 |
Coefficient of thermal expansion, LW | D-696 | 10^-6in./in./℃ | 8 |
Flame retardant performance | ASTM | Unit | Value |
|---|---|---|---|
Tunnel test* | E-84 | Flame spread | Max. 25 |
Flame resistance* | D-635 | --- | Non-combustible |
Electrical properties | ASTM | Unit | Value |
|---|---|---|---|
Arc resistance, LW | D-495 | 秒（s） | 120 |
Dielectric strength, LW | D-149 | kv./in. | 35 |
Dielectric strength, PF | D-149 | V/mil | 200 |
Dielectric constant, PF | D-150 | @60hz | 5 |
LW = lengthwise, CW = crosswise, PF = perpendicular to laminate surface
*Applies to ISOFR and VEFR only
Application Scenarios
Square tube special-shaped profiles are suitable for load-bearing and support structures with requirements on strength, span and corrosion resistance, such as building platforms, bridge and highway ancillary facilities, and chemical and food and beverage workshops. The isophthalic resin system performs well in chemical resistance and weatherability, making it suitable for long-term use in damp or corrosive environments. For specific application suitability, please consult us with your load and environmental conditions.
Selection Guide
When selecting, match the cross-section dimensions (A×B) and wall thickness (T1×T2) to the load capacity and installation interface, and refer to the dimensions and weight data in the table to estimate structural dead weight. If you need to weigh different resin systems or cross-sections, please provide your operating environment, span and load information, and we can help you determine the appropriate specification.
Product Advantages
This structural profile uses glass fiber reinforcement and resin as its matrix, formed through impregnation, molded curing and pultrusion. It offers the typical characteristics of composite materials such as light weight and high strength, corrosion resistance, electrical insulation, and ease of cutting and drilling, making it suitable for high-strength, long-span applications. Compared with traditional materials, its maintenance requirements are usually lower; specific performance depends on specification and operating conditions.
Inquiry Guidance
For detailed specifications, dimension ranges, resin system options and commercial terms for square tube special-shaped profiles, please contact us for detailed specifications and a quotation. Please provide your target cross-section, quantity and operating environment, and we will arrange technical selection and a commercial response accordingly.
Custom Cutting
Need panels that fit, or cut to shape? We custom cut FRP grating and profiles to your drawing: panels cut to size or to shape (corner cuts, cutouts), cut edges sealed with resin, and pre-cut and pre-drilled to drawing before shipping. See the custom cutting services.
