GRP (Glass reinforced plastic) cable trays are widely used these days, their tough physical properties and ease of installation is what makes them an engineer’s favourite. They are anti-corrosive in nature and are shock absorbent as well. There is more that you need to know about these GRP Cable Trays before you include them for your upcoming venture!
Several raw materials are used to produce a GRP Cable Tray, like glass fibers, glass mat, surface veil and resin among others. They are dipped in liquid resin, as a result of which the glass fiber gets impregnated. Now this impregnated fiber is passed through heated steel shaping die, which makes up the texture of resin into a gel and hence a solid cable tray (the initial phase) is carved out.
This process is known as Pultrusion.
The glass mat provides the strength to the cable tray in horizontal and vertical direction. To provide the finish of the cable tray there are various accessories which are fitted to the tray like bends, tees, cross, reducers and others. The uneven edges are smoothened and joints are fixed with bolts and screws to fix them completely tight before hitting out to the large market. GRP cable trays are used globally, in the manufacturing and construction of huge infrastructural projects like railway handrails, flyovers, transformers, drainages among the many.
Types – There are 2 basic types of GRP Cable Trays as mentioned below:
- Ladder type – These constitute the longitudinal sections which form C-shape joint by rungs. They are differentiated according to their holding capacity.
- Perforated type – These are made of a solid bottom with holes on the sides, which provide ventilation for the electric waves passing within the cables in the tray. The perforations may also be available in the bottom while sideways remain complete. Depending on the requirement you may choose the perforated type of cable tray. These have an advantage of enduring heavy load electric wires passing through them, because of the ventilation facility. Also, the surface does not get much heated up or even if it does, it cools down faster.
Usages of GRP Cable Trays – The commercial business forums which go for GRP Cable trays are mainly refineries, oil and petrochemical industries, electricity distribution, marine activity, bakery, manufactures and chemical industry.
Benefits of GRP Cable Trays– Previously metal trays were used, however the introduction of GRP Cable Trays has made our lives easier as it comes with several benefits over the metal trays, as below:
- Anti –corrosive and excellent electric insulation capacity is what makes them one of the most preferred in the recent days.
- Easy to install and move, since they are light weight
- UV resistant with very low thermal conductivity
- Non-toxic – they don’t react with the highly chemical substances that might pass through them.
- Long shelf life
- Fire retardant
- They are generally available in grey colour which may fade with time but absence of corrosion makes the look better than the aged traditional ones.
- High strength to weight ratio
- Cost effective
Not only GRP Cable Trays have these enormous benefits but they are also cost effective. While buying these GRP Cable Trays for your upcoming project, ensure that you consult the leading manufacturer so that they are tested and meet the quality standards.