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Structural Profiles - Square Tube Custom Profiles (Orthophthalic)
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Greenlogy TEC
FRP pultruded profiles are made from glass fiber reinforcement, with resin as the binder and glass fiber cloth as the wrapping reinforcement layer. After thorough impregnation, they are heated, formed and cured in a metal mold and then pulled by a pulling machine to form a new type of composite material with good physical properties, widely used in high-strength and 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
Recreation
Telecommunications
Transportation
Water and wastewater treatment
Features:
Corrosion resistance
Low maintenance
Flame retardant
Low installation cost
Safe in heavy-metal environments
Long service life
Electrically and thermally non-conductive
High strength-to-weight ratio
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 grade with good to moderate resistance to acids, alkalis and solvents |
OFR-25 | Orthophthalic type | Oxygen index 28 and above | General acid and alkali environments |
Applications:
Greenlogy TEC pultruded FRP profiles are widely used in various applications, 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, longitudinal | D-638 | psi | 30000 | kgf/m² | 21092086 |
Tensile stress, transverse | D-638 | psi | 7000 | kgf/m² | 4921487 |
Tensile modulus, longitudinal | D-638 | 10^6psi | 2.5 | 10^6kgf/m² | 1758 |
Tensile modulus, transverse | D-638 | 10^6psi | 0.8 | 10^6kgf/m² | 562 |
Compressive stress, longitudinal | D-695 | psi | 30000 | kgf/m² | 21092086 |
Compressive stress, transverse | D-695 | psi | 15000 | kgf/m² | 10546043 |
Compressive modulus, longitudinal | D-695 | 10^6psi | 2.5 | 10^6kgf/m² | 1758 |
Compressive modulus, transverse | D-695 | 10^6psi | 1 | 10^6kgf/m² | 703 |
Flexural stress, longitudinal | D-790 | psi | 30000 | kgf/m² | 21092086 |
Flexural stress, transverse | D-790 | psi | 10000 | kgf/m² | 7030695 |
Flexural modulus, longitudinal | D-790 | 10^6psi | 1.8 | 10^6kgf/m² | 1266 |
Flexural modulus, transverse | D-790 | 10^6psi | 0.8 | 10^6kgf/m² | 562 |
Modulus of elasticity | 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 | % maximum | 0.45 |
Density | D-792 | lbs./in.³ | 0.062-0.07 |
Coefficient of thermal expansion, LW | D-696 | 10^-6in./in./℃ | 8 |
Flammability | ASTM | Unit | Value |
|---|---|---|---|
Tunnel test* | E-84 | Flame spread | 25 max |
Flammability* | D-635 | --- | Non-burning |
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 | Volts/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
Structural Profiles - Custom Square Tube Profiles (Orthophthalic Type) are suitable for load-bearing and support structures requiring corrosion resistance, light weight and high strength, such as platform walkways, handrails and cable trays, as well as corrosive environments in the chemical and water treatment industries. When selecting for a specific project, we recommend considering both load and environmental conditions. Please contact us for detailed specifications and a quotation.
Selection Guide
When selecting, please confirm the cross-section dimensions, wall thickness and length requirements of the square tube, and evaluate them together with the actual loads, span and installation method. For advice on fatigue or long-term performance, please contact our technical team for detailed specifications and a quotation.
Product Advantages
Orthophthalic resin gives the profiles good chemical corrosion resistance and water resistance, while glass fiber reinforcement provides relatively high specific strength and specific stiffness. They are also lightweight and easy to cut and install. Compared with traditional metal profiles, maintenance costs are lower. Please contact us for detailed specifications and a quotation.
Inquiry Guidance
If you need detailed technical parameters, dimension tables or commercial terms for Structural Profiles - Custom Square Tube Profiles (Orthophthalic Type), please contact us directly. We can provide selection support based on your project requirements. Please contact us for detailed specifications and a quotation.
Operating Environment
- These FRP structural profiles are produced with orthophthalic resin and glass fiber reinforcement, and are suitable for indoor and outdoor installations where moisture and water vapor are present.
- They resist corrosion from a variety of acids, alkalis and salts, and are commonly used in chemical plants, food and beverage facilities and water treatment areas where metal profiles would degrade.
- Typical applications include building structures, bridge and highway components, and industrial platforms exposed to weather and temperature changes.
- For detailed operating temperature ranges or specific chemical resistance data, please contact us for the complete parameter table.
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.
