Replace HDGS Gratings with FRP – A Smarter Choice for Singapore Projects

Recently, a client from Singapore reached out to us with a clear objective: replacing their existing hot-dip galvanized steel (HDGS) gratings with our fiberglass reinforced plastic (FRP) alternatives. This growing trend is no coincidence. More and more industries are choosing FRP over traditional materials due to its outstanding performance, lower maintenance needs, and longer service life.

Why Switch from HDGS to FRP?

HDGS gratings have been used for decades, especially in heavy-duty applications. However, they come with several disadvantages such as corrosion, high weight, and regular maintenance. FRP gratings, on the other hand, are:

Corrosion-resistant: Ideal for coastal or marine environments like Singapore's.
Lightweight: Easier to transport, handle, and install.
Non-conductive: Safer for electrical applications.
UV and weather resistant: Ensures durability in outdoor environments.
Low maintenance cost: No repainting or galvanizing required.

FRP vs HDGS Grating Comparison Table：

Property	FRP Grating	HDGS Grating	Advantage
Corrosion Resistance	Immune to acids/alkalies/saltwater	Zinc coating degrades in 5-8 years	3-5x longer service life
Strength-to-Weight	280MPa at 1.8g/cm³	400MPa at 7.8g/cm³	70% lighter at comparable strength
Maintenance Cost	$0 over 20 years	$150/m²/year (recoating)	100% savings
Electrical Conductivity	Non-conductive (10¹² ohm-cm)	Highly conductive	Safe for substations
Installation	25㎡/hour (clip system)	10㎡/hour (welding)	2.5x faster
Fire Performance	UL94 V0 optional	Melts at 450°C	Superior fire safety
Customization	Any color/thickness/mesh	Limited to standard galvanized	Design flexibility
Lifetime	20-25 years (pH 0-14 environments)	8-12 years (marine/chemical)	2x lifespan

Applications in Singapore's Infrastructure

From walkways and platforms in port terminals to drainage covers in industrial zones, FRP gratings are becoming the preferred option for engineers and construction managers across Singapore. The humidity and coastal climate make corrosion a constant concern-one that FRP naturally solves.

How We Support the Transition

At Preet Composite Materials, we offer a wide variety of FRP grating products, including molded and pultruded types that can be customized in size, color, and resin system. Whether you need replacement panels or a full system redesign, we provide detailed datasheets, technical support, and free samples upon request.

Client Example: Singapore Retrofit Project

In this case, our Singapore client provided us with specifications of their current HDGS setup. We helped them select the equivalent FRP panels with better performance under similar load-bearing requirements. They chose our pultruded grating type "T-500" made from vinyl ester resin, ensuring top-tier chemical resistance and mechanical strength.