Structural Profiles - Round Tube (Isophthalic)
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Genius FRP
FRP structural shapes profile is made of glass fiber reinforced material, resin as adhesive, glass fiber cloth as a package reinforcement layer, through the thorough penetration, in the metal mold heating, molding, curing, drawing in the traction machine pulled A new type of composite material, with good physical properties, widely used in high strength, large span Situation.

Varieties | Size(mm) | Weight(kg/m) | Size(in) | Weight(lbs/in) |
Round tube | D*T | D*T | ||
| RT25 | 25*3.2 | 0.44 | 1" x 1/8" | 0.97 |
| RT26A | 26*3 | 0.42 | 1" x 1/8" | 0.93 |
| RT26B | 26*4.8 | 0.63 | 1" x 3/16" | 1.39 |
| RT32A | 32*3.2 | 0.55 | 5/4" x 1/8" | 1.21 |
| RT32B | 32*5 | 0.81 | 5/4" x 3/16" | 1.79 |
| RT32C | 32*6 | 0.96 | 5/4" x 1/4" | 2.12 |
| RT38A | 38*3.2 | 0.65 | 3/2" x 1/8" | 1.43 |
| RT38B | 38*4 | 0.81 |
3/2" x 3/16"
| 1.79 |
| RT38C | 38*5 | 1 | 3/2" x 3/16" | 2.2 |
| RT38D | 38*6.4 | 1.18 | 3/2" x 1/4" | 2.6 |
| RT41 | 41*4.5 | 0.98 | 13/8" x 3/16"
| 2.16 |
| RT42A | 42*3.2 | 0.7 | 13/8" x 1/8" | 1.54 |
| RT42B | 42*5 | 1.11 | 13/8" x 3/16" | 2.45 |
| RT42C | 42*6.4 | 1.45 | 13/8" x 1/4" | 3.2 |
| RT48 | 48*6.4 | 1.58 | 15/8" x 1/4" | 3.48 |
| RT50A | 50*3.2 | 0.84 | 2" x 1/8" | 1.85 |
| RT50B | 50*4 | 1.1 | 2" x 3/16" | 2.43 |
| RT50C | 50*5 | 1.34 | 2" x 3/16" | 2.95 |
| RT50D | 50*6.4 | 1.67 | 2" x 1/4" | 3.68 |
| RT50E | 50*3.5 | 0.96 | 2" x 1/8" | 2.12 |
| RT50.8A | 50.8*6.4 | 1.7 | 2" x 1/4" | 3.75 |
| RT50.8B | 50.8*3.2 | 0.86 | 2" x 1/8" | 1.9 |
| RT64A | 64*3.5 | 1.26 | 5/2" x 1/8" | 2.78 |
| RT64B | 64*6.4 | 2.38 | 5/2" x 1/4" | 5.25 |
| RT75 | 75*4.2 | 1.8 | 3" x 3/16" | 3.97 |
| RT76 | 76*6.4 | 2.64 | 3" x 1/4" | 5.82 |
| RT89A | 89*3.2 | 1.54 | 7/2" x 1/8"
| 3.4 |
| RT89B | 89*5 | 2.51 | 7/2" x 3/16"
| 5.35 |
| RT89C | 89*6.4 | 3.13 | 7/2" x 1/4" | 6.9 |
| RT99 | 99*5 | 2.81 | 4" x 3/16" | 6.19 |
| RT101 | 101*6.4 | 3.62 | 4" x 1/4" | 7.98 |
| RT114A | 114*3.2 | 2.12 | 9/2" x 1/8" | 4.67 |
| RT114B | 114*5 | 3.25 | 9/2" x 3/16"
| 7.17 |
| RT114C | 114*6.4 | 4.11 | 9/2" x 1/4" | 9.06 |
| RT114D | 114*9.5 | 5.93 | 9/2" x 3/8" | 13.07 |
| RT150A | 150*3.2 | 2.81 | 6" x 1/8" | 6.19 |
| RT150B | 150*5 | 4.35 | 6" x 3/16" | 9.59 |
| RT150C | 150*6.4 | 5.5 | 6" x 1/4"
| 12.1 |
| RT150D | 150*9.5 | 8 | 6" x 3/8" | 17.6 |
Markets

Architectural
Bridge & Highway
Chemical
Food & Beverage
Manufacturing
Metals & Mining
Microelectronics
Oil & Gsa
Pharmaceutical
Power
Pulp & Paper
Recreation
Telecommunications
Transportation
Water & Wastewater
The characteristics:
Corrosion Resistant
Low Maintenance
Fire Retardant
Low Install Cost
Heavy Metal Safe
Long Service Life
Electrically & Thermally Non Conductive
High Strength-to-Weight Ratio
Introduction of raw materials——Resin type
Code | Resin type | Flame retardant property | Recommended usage occasions |
VEFR-25 | Vinyl type | Oxygen index 28 or above | Acid, alkali and other corrosive harsh environment |
IFR-25 | Meta benzene | Oxygen index 28 or above | A VEFR type economy, and excellent, moderate acid alkali and solvent |
OFR-25 | Ortho type | Oxygen index 28 or above | General acid and alkali environment |
Application:
Genius© pultruded fiberglass structural shapes from Genius Composite Inc. are used in a wide range of applications and provide a unique combination of corrosion resistance, high strength, dimensional stability and light weight, along with thermal and electric non-conductivity. Durable Genius shapes provide years of low maintenance service in areas where steel, aluminum or wood components are traditionally specified. Today ,these shapes are often used in highly corrosive applications where stainless steel and other expensive components were once required.
Genius Shapes
Physical Properties | ASTM | Units | Value |
Barcoal | 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 |
Flammability Properties | ASTM | Units | Value |
Tunnel test* | E-84 | Flame Spread | 25 max |
Flammability* | D-635 | --- | Non-Burning |
Electrical Properties | ASTM | Units | Value |
Arc Resistance,LW | D-495 | seconds | 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 Face
*Pertains to ISOFR and VEFR only
Application Scenarios
Round tube profiles are commonly used in load-bearing and support structures requiring strength and span, such as platform handrails, ladders, grating support beams, cable tray supports, and frame components in corrosive environments such as chemical and coastal facilities. The isophthalic resin system is suitable for working conditions with higher corrosion resistance requirements. For specific application scenarios, please contact us to discuss.
Selection Guide
When selecting, first confirm whether the outer diameter and wall thickness (D*T) meet the fitting requirements of connectors and load-bearing needs, then evaluate the cross-sectional dimensions based on span, support method, and operating environment. The table provides both metric and imperial specifications for easy correspondence with existing design drawings. If you need to balance strength, stiffness, and weight, please provide your working conditions and we will assist with selection.
Product Advantages
Pultruded round tubes use fiberglass as reinforcement and resin as matrix, formed continuously through impregnation, heating, and curing. They feature light weight, high strength, corrosion resistance, non-magnetic properties, electrical insulation, and ease of cutting and drilling, making them suitable for replacing some metal pipes in corrosive or insulating applications. The isophthalic resin formulation offers more stable performance in water and chemical resistance.
Inquiry Guide
For detailed specifications, available size ranges, surface treatment methods, and packaging and transportation arrangements of round tubes, please contact us for detailed specifications and quotations. Please provide the required outer diameter, wall thickness, length, quantity, and operating environment, and we will respond with a corresponding solution.
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