Yingnai FRP Rectangular Tube is engineered for structural frames, beams, equipment supports and corrosion-resistant assemblies requiring different bending stiffness in two directions. Continuous fiberglass reinforcement provides high strength with low structural weight. Width, height, wall thickness, resin system, length and connection configuration can be customized according to loading, span and installation conditions.
| Item | Typical Technical Specification |
| Product Name | FRP Rectangular Tube |
| Cross-Section | Closed rectangular hollow pultruded profile |
| Typical Size Range | Width 40–250 mm; height 20–150 mm; wall thickness 2.5–10 mm |
| Dimension Designation | Outside width × outside height × wall thickness |
| Standard Length | 6 m standard; 3–12 m can be supplied |
| Material System | Pultruded E-glass or ECR-glass reinforcement in an isophthalic polyester, vinyl ester or project-selected thermoset resin matrix |
| Mechanical Properties | Density 1.7–2.0 g/cm³; longitudinal tensile strength typically ≥200 MPa; longitudinal flexural strength typically ≥200 MPa; flexural modulus typically ≥17 GPa |
| Section Orientation | The strong and weak bending axes shall be identified in structural design |
| Typical Applications | Equipment frames, beams, handrail posts, machine guards, structural frames and cable supports |
| Inspection | Dimensional inspection, straightness, twist, cut length, surface condition, wall thickness, cure and Barcol hardness |
| Applicable Standards | ASTM D3917, ASTM D4385, ASTM D638, ASTM D790 and ASTM D2583 |
| Selected Standard Sizes | |||
| Profile Size | Unit Weight | Profile Size | Unit Weight |
| 180 × 60 × 4 mm | 3.60 kg/m | 160 × 60 × 4 mm | 3.16 kg/m |
| 140 × 60 × 3 mm | 2.16 kg/m | 120 × 60 × 5 mm | 3.33 kg/m |
| 100 × 50 × 5 mm | 2.70 kg/m | 90 × 44 × 7 mm | 2.236 kg/m |
| 90 × 44 × 5 mm | 1.90 kg/m | 86 × 32 × 3 mm | 1.51 kg/m |
| 75 × 35 × 6 mm | 1.58 kg/m | 63.5 × 37 × 3.5 mm | 1.274 kg/m |
| 60 × 35 × 3 mm | 1.00 kg/m | 60 × 30 × 3 mm | 1.07 kg/m |
| 60 × 30 × 2.7 mm | 0.87 kg/m | 48 × 32 × 3 mm | 0.88 kg/m |
| 40 × 20 × 2.5 mm | 0.555 kg/m | 50 × 50 × 5 mm finned | 2.70 kg/m |
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