Shade Card
Everlast composite manholes & gratings which includes FRP manhole
covers, stainless steel manhole covers, concrete manhole covers, FRP
gratings, stainless steel gratings, iron gratings, concrete gratings that
are available in a wide array of colours. We offer products in a set of
colours from which client's can choose from. The shade card facilitates
buyer's to choose the required colour so that it meets their aesthetic
needs.
Composition
It is made with compression moulding process using glass fibre woven cloth
embedded with modified resin. Glass fibre content will be upto 50%.
Continuous fibers in woven form gives enormous strength to the product. Top
layer of the cover & frames consist of quartz & corundum which adds
to the wear resistance of surface.
In case of stainless steel manhole covers ribs are provided to increase
load capacity. But for designing composite manhole covers instead of ribbing
pot bottom style is used. This means thickness of manhole cover will be more
at the center and reduce towards the edge. This style of design provides
more strength supporting area.
Everlast composite manhole cover consists of:
- Modified unsaturated resin
- Glass fibre (E-glass)
- Quartz Antioxidant
- Firming agent
- Promoter
- UV additive
- Enthylene-Propylene-Diene-Monomer
- Cr13
- Other auxiliary materials
Application Temperature Scope
The materials used to manufacture the manhole covers are important, that is
why we only use quality materials. The main material that contributes to the
product application temperature is the unsaturated resin. It belongs to the
thermosetting resin family. The performance after its solidification is as
follows:
- Longitudinal strength: 250-800Mpa,
- Compressive strength: 300-600Mpa,
- Stretch modules: 25-35 Gpa,
- Break elongation ration: 1.3-10.0%
- Bending strength:700-1400Mpa,
- Curving module:25-35Gpa,
- Poision ratio:0.35,
- Relative density:1.11-1.15,
- Water absorptive (24h):10-30mg,
- Volume resistivity: 1X(1012-1014)?cm.
