FRP MANHOLE COVER (ROUND / SQUARE / RECTANGLE / RECESS COVER)

Product Description

FIBRE-REINFORCED POLYMER (FRP)

Is a composite material made of a polymer matrix reinforced with fibers. The fibers are usually glass fibers, the polymer is usually an epoxy, vinyl ester or polyester thermosetting plastic, and phenol

formaldehyde resins are still in use. FRPïs are commonly used in the aerospace, automotive, marine, construction industries and ballistic armor.

COMPRESSION MOULDING

When the raw material containing reinforced fibers are compressed & molded at certain pressure & temperature the final outcome would be called a FRP molded product, which qualifies it as a fibre- reinforced polymer. More typically the polymer preform used in compression molding does contain reinforcing fibers. In compression molding, a "preform" or "charge", of SMC, BMC is placed into

molding cavity, the mold is closed and the material is formed & cured inside by pressure and heat. Compression molding offers excellent detailing for geometric shapes ranging from pattern and relief

detailing to complex curves and creative forms, to precision engineering all within a maximum curing time of 20 minutes.

ADVANTAGES AND LIMITATIONS

FRP allows the alignment of the glass fibers to suit specific design programs. Specifying the orientation of reinforcing fibers can increase the strength and resistance to deformation of the polymer. Glass

reinforced polymers are the strongest and most resistive to deforming forces when the polymers fibers are being exerted with a parallel force. 

HIGH LOAD RATING AND STRENGTH: Similar hardness in property as cast iron, but major advantages on stretch recovery and bend resistance. Less noise and lower vibration transmissions. Designed to meet and exceed A 15/ B125/ C250/ D400/ E600/ F900 loading rating, according to En 124: 1994.

AGAINST THEFT AND SAFETY OPTIONS: Comparing with cast iron manhole cover, composite cover has zero theft value and therefore not attractive to thieves, which reduce the potential accident and further maintenance cost caused by theft. Surface anti-slip thread guarantees safe road condition even in extreme weather. Locks are available as an option molded into the cover to improve security rate. Non-electricity conduction and non-heat conduction, UV resistance.

EASE IN INSTALLATION: Compared with cast iron manhole covers, composited covers are 30% lighter. Lighter weight allows ease of handling, more loading per vehicle and more convenient transportation. This allows for safe working conditions, where a SINGLE worker is enough for a complete installation without risk of injury. Easy handling and movement reduce maintenance cost.

DURABLE SERVICE LIFE: More than 30 years theoretical service life at usual road condition. Anti corrosion, dust and waterproof, well sealed prevent poisonous gases from leaking out. Higher and lower temperature tolerance.

FREE DESIGN: Composite material itself allows for innovative design features. Client logo and their own design is available as an option. Much more clear resolution ratio design than cast iron or of other material.

SIZES AND TYPES 

FRP MANHOLE COVER (SQUARE ) 300 X 300 MM TO 1200 X 1200 MM

FRP MANHOLE COVER (RECTANGLE) 600 X 450 MM TO 900 X 1200 MM

FRP RECESS COVER (RECESS COVER ) 300 X 300 MM TO 1000 X 1000 MM