Sewer Accessory Products

GRP Manhole Cover with Frame
Areas of Application
Private : Residences, gardens, terraces, garages, driveways, etc.
Public : Roads, pedestrian zones, parking lots, sport facilities, swimming pools, arcades, municipal sewage system etc.
Industrial: Roads, service stations, plant facilities, petrochemical plants, etc.

Manhole Covers with frame on Polymer Concrete cast
Important Features:

- Light weight
- Maintenance-free
- Rust-free
- Anti –theft locking system
- Adaptable to manholes with carbon GRP basket
- Adaptable to manholes with sealing GRP plate
- The size to weight ratio is exceptional
- Manhole cover can withstand static loading of up to 40 tons.

Al-Watani Manhole Covers are made of GRP composite materials of Vinyl Ester Resin matrix, reinforced with fiberglass resulting in a super strong and durable material. Can easily be installed and removed by one pers -on.

At top of the cover it has 2 Nos. SS316L bolts with a special key handle for lifting the manhole cover.

Qualified to BSEN 124 D400

Non-skid surface finish

PHYSICAL PROPERTIES AND DESIGN VALUES OF WATANI GRP MANHOLE COVERS The following is a summary of the physical properties and design values applicable to manhole covers which are used in determining the performance of GRP in various system applications.

Physical Properties:

Hand-layup laminates		Structural Layer
Specific gravity, kg/dm3	1.3 – 1.7	Specific gravity, kg/dm3	1.8 – 2.0
Impact strength,kJoules/m2	8	Impact strength, kJoules/ m2	12
Machinability	Good	Machinability	Good
Barcol hardness	25-45	Barcol hardness	25-45

1).Successfully passed the cyclic-loading testfrom 0 to 10 tons continously for a period of 2,160 hours.
2). Load-to-destruction test. It hold the load for 1 minute at above 40 tons. No damage was noticed. Test witnessed by Kuwait MPW, later verified by British Llyods, U.K.

In-service test (6 Months) – installed on un-asphalted road with heavy traffic loads.

Manhole Sealing Plate

Brief Description of the Process: The manufacturing process is called “Resin-Transfer-Moulding” (RTM). The composite materials of resin and reinforcements are molded on a two-piece mould which will result in “both-side-smooth” surface finished product.

Dimensions:

Inner diameter (ave.)	562.7 mm
Outer diameter (ave.)	575.3 mm
Wall Thickness (ave.)	5.4 mm
Glass-to-resin ratio	35:65
Barcol Hardness	50
Barcol Hardness	A direct load of 150 kgs. loaded at the center. Deflected 25mm at the center.