FRP Moulded Gratings

About FRP Moulded Gratings

An FRP Moulded Grating is a type of Fiber Reinforced Plastic grating formed by molding resin with fiberglass strands into a single-piece, grid-like structure. These gratings are widely used in industrial environments due to their corrosion resistance, strength, and non-conductive properties.

What FRP Moulded Grating Contains:

1. Resin Matrix (Thermosetting Resin):

   • Binds the fiberglass reinforcement.

   • Types of resins used (chosen based on environment):

     • Isophthalic Polyester Resin general chemical resistance

     • Vinyl Ester Resin high chemical and corrosion resistance

     • Orthophthalic Polyester Resin economical, moderate resistance

     • Phenolic Resin fire retardant and smoke suppressant

2. Fiberglass Reinforcement:

   • Continuous glass fiber rovings layered in both longitudinal and transverse directions.

   • Provides strength, load-bearing capacity, and structural integrity.

3. Moulded Grid Structure:

   • Formed by placing the fiberglass and resin mixture into a heated mold.

   • Cures into a one-piece panel with uniform distribution of resins and fibers.

   • Mesh types vary: square (standard), rectangular, mini-mesh, etc.

4. Surface Finish:

   • Anti-skid surface (commonly concave, grit top, or smooth).

   • Grit is usually silicon carbide or quartz, embedded during molding for slip resistance.

5. UV Stabilizers (Optional):

   • For outdoor use, UV inhibitors are added to protect against sun degradation.

6. Color Pigments (Optional):

   • Pigmented throughout the thickness of the grating.

   • Common colors: yellow, green, grey, black.

7. Fire Retardants (Optional):

   • To meet fire safety standards like ASTM E84 or UL94.

Available Forms:

• Panel Sizes: Commonly 1220x3660 mm (4x12) or custom sizes

• Thicknesses: Typically from 25 mm (1) to 50 mm (2)

• Mesh Sizes: e.g., 38x38 mm (standard), 19x19 mm (mini-mesh), etc.

Applications:

• Walkways, platforms, and stair treads

• Chemical plants and offshore rigs

• Water treatment facilities

• Battery rooms (non-sparking)

• Cooling towers and trench covers