Hongwo FRP Rectangular Tubes: Engineered for Demanding Applications

Our pultruded fiber-reinforced polymer profiles combine ECR-glass fibers with isophthalic polyester resin to deliver exceptional strength-to-weight characteristics. Unlike conventional fiberglass channels, Hongwo‘s proprietary manufacturing process achieves ±0.15mm dimensional consistency across all production batches – a critical advantage for structural applications.

Material Composition & Key Properties

Reinforcement: 70% bidirectional E-glass fabric (ASTM D4389 compliant)

Matrix System: Fire-retardant resin with 1.5% antimony trioxide additive

Physical Properties:

✓ 1,920 MPa flexural strength

✓ 0.00028 in/in/°F CLTE (longitudinal)

✓ 1.7 g/cm³ density (43% lighter than aluminum)

Why Choose Over Metal Extrusions?

Hongwo’s composite profiles outperform aluminum 6061-T6 in:

• Salt spray resistance (zero corrosion after 10,000 hrs ASTM B117)
• Thermal insulation (R-value 3.2 per inch thickness)
• Electromagnetic transparency (ideal for radar installations)

Case Study: Petrochemical Pipe Support System

When thermal cycling caused aluminum support channels to fail every 14 months in a Guangdong refinery, our FRP rectangular tubes:

Extended service life to 8+ years

Reduced maintenance downtime by 63%

Withstood 98% sulfuric acid exposure

Quality Assurance Process

Every production run undergoes:

Dielectric testing (minimum 12 kV/mm)

Barcol hardness verification (52-55 range)

Full-length dimensional scans (0.1mm accuracy)

Installation Guidelines

For optimal performance:

• Use 1.5x bolt diameter edge distance
• Apply 8-10 N·m torque for M8 fasteners
• Avoid direct contact with dissimilar metals

…when structural reliability can’t be compromised, specify Hongwo’s FRP rectangular tubes for guaranteed performance.