GRP Hot Pressed Sectional Panel Tanks has an excellent corrosion-resistant panels, the surface of the tank is uniformly smooth without any mass growth, therefore enable longterm use as the panels inhibit the proliferation of bacteria and other various germs by perfectly blocking all light from outside. Sectional tank utilizes horizontal and vertical space at the maximum and those are suitable for tanks of large capacities. It operates a corner-type system.
Singapore Standard SS245: 2014 Similar to British Standard BS 7491 Part 3:1994 and BS EN 13280:2001 which is match with QCS 2014 Standard
Sheet Moulding Compound(SMC)consists of:
1) Resin- Isophthalic unsaturated polyester resin conforming to BS 3532
specification.
2) Fiber Glass- Low alkali fiberglass conforming to JIS R3411 to R3417 or BS 33396, BS
3496 and BS 3749 specifications.
Hot pressed SMC compression moulding.
1) Internal support (Tie-rod System) - External standard type : Hot Dipped Galvanized
Steel(HDG)
- Internal standard type : SS 316 A4 (Tie-rod & bolts and nuts) & with PVC pipes
roof supports with GRP roof panel stiffener
2) External support - External supports: Hot Dipped Galvanized Steel(HDG)-Internal
Support: None (metal free inside, non-partitioned tank only), roof support: PVC
Poles with GRP roof panel stiffener Steel Skid:- Steel skid required for 1.5 m height
& above only as per the below table.
Sheet Moulding Compound(SMC)consists of:
1) Resin- Isophthalic unsaturated polyester resin conforming to BS 3532
specification.
2) Fiber Glass- Low alkali fiberglass conforming to JIS R3411 to R3417 or BS 33396, BS
3496 and BS 3749 specifications.
One Manhole access cover will be provided to the tank for each compartment.
Inlet, outlet, overflow and drain included to the tank (as per the client’s requirement). Available sizes ( 1”, 1.5”, 2”, 3”......)Ladders One Internal (GRP ) ladder for 1.5mtrs . height & above only. One External (Galvanized ) ladder for 1. 5mtrs. height & above only.
One Water level indicator for 1.5mtrs. height & above only.
Hot press molded fiberglass reinforced polyester (GRP) manufactured, using the sheet moulding compound (SMC) method of production. GRP is completely stable after curing.
Grey. Prevents light transmission and inhibits algae growth
1. Wide Range of Availability:Available in various sizes to meet any customerdemands.
2. Clean & Hygienic:No corrosion from panel and prevent bacterial growthby isolating outside light.
3. Leakage - Free:The special sealing tape developed for joints ensureszero leakage.
4. Dimensional Accuracy:Sectional GRP panel sizes are changeless from theoutside condition so easy to assembly.
5. Intensity and Durability:To maintain best endurance the glass fiber reinforcedpanel is molded under high temperature & pressure.Since using stainless steel for inside structure andplated steel for outside, it shows best performanceagainst erosion.
6. Heat Insulation and Dewdrops Prevention:The heat insulation panel with 3 layer structuredimproves heat insulation effect. Protects water fromdewdrops and minimizes temperature variation of thestored water.
7. Easy to Assembly and Moving:Sectional panels make construction time shorter,standardization panel make easier to moving, carryingin and transfer.
The GRP insulated panel has specially developed lowthermal conductive rigid polyurethane foam, fabric inbetween GRP single panel and GRP cover as shown below.These panels`are used for the side and bottom and roof ofthe tanks. Since an air layer exists between the roof and thewater level,which itself acts as a thermal insulation, singlepanels are used for the roof. Other company's insulatepanel cannot endue by high temperature.
| THERMAL CONDUCTIVITY | |
| TANK TYPE | THERMAL CONDUCTIVITY Kcal/m.hr (J/m hr) °C |
| STEEL | 37.0 (1.55 x 105) |
| GRP (Standard) | 0.15 (630) |
| GRP (Insulated) | 0.02 (84) |
| Product Features | |
| 1) DESIGN GRP water tanks are designed to satisfy these basic requirements to ensure supplies of clean potable water at all times: A- Stable and Secure Dimensions B- Anti-Ultraviolet light C- Drains completely ease of maintenance D- Easy Assembly and Installation E- Prevent dirt accumulation and algae growth F- Durability and long service life 2) PROPERTIES: A- Material : Hot press molded glassfibre reinforced polyester (GRP) manufactured using the sheet moulding compound (SMC) method of production. GRP is completely stable after curing. B- Colour : Grey. Prevents light transmission and inhibits algae growth C- Design : A combination of base, roof, side, flat and sump panels of 1m x 1m dimensions, allows easy installation to any required size. Maximum height is limited to 5 meters. The raised base panels combined with a deep sump panel ensures that water drains completely, allowing easier cleaning and maintenance procedures. The smooth internal surface prevents dirt accumulation and discourages algae growth ensuring clean potable water at all times. D- Durability: GRP panels have been subjected to 15 years simulated service life in open tropical conditions. The product remains in conformity to original SS 245:1995 specifications for glassfibre reinforced sectional water tanks after this period. 3) PRODUCTION: 3.1- Technical Assistance: GRP water tank panels are manufactured from POTAGLAS technology. The production process uses Glassfibre Reinforced Polyester (GRP) material, commonly referred to as fibreglass. 3.2- Raw Materials: The material used in the production of POTAGLAS’S GRP water tank panels is referred to as Sheet Moulding Compound (SMC). SMC is supplied, premixed, in reels of 2mm thick sheets. SMC contains precise proportions of resin chopped strand fibreglass, styrene, and a filler material of calcium carbonate, in a consistent |
and homogenous mixture. This ensures that each and
every panel, produced will be of exactly the same
quality and characteristics. The quality of the material is
consistent throughout each manufacturing process. 3.3- Production Method: The SMC method of production is the latest technology in fiberglass manufacturing methods. It has been widely adopted in many manufacturing processes, including the automotive industry, where its inherent high quality surface finish, physical strength and stability are highly regarded, GRP water tank panels are produced with a predetermined weight of SMC material, layers of fiberglass mat and a final layer of cross weaved fiberglass cloth. The weight of each composite is precisely checked with an electronic weighing scale. The composite is then placed on a pre-heated mould with a temperature of 150˚C and pressed with a pressure of up to 50 kg/cm2. The advantages of the SMC method of production are clearly seen here. POTAGLAS’ contribution to quality control is to ensure that the precise weight of material is used. The quality control for the SMCmaterial is already ensured in the SMC premixing process is perfect. 3.4- Colours: SMC is produced in two basic colours, grey and beige. In tropical countries, grey coloured SMC panels’ blends better with the environment. Beige panels are popular in Japan where a preference for light coloured building materials prevails. Imperfections in the manufacturing process shows more prominently in grey coloured panels as opposed to beige, allowing visual posts production quality control procedures to be implemented. 3.5- Process Quality: The SMC method of production is now widely accepted in the manufacturing of water tanks. Out of a total of eight fiberglass water tank manufacturers in Japan, seven have adopted the SMC method of production. Only one uses a more dated method of fiberglass panel production. SMC provides manufacturers with total product quality control, and users with the assurance that their product is consistent, strong and durable. |
In this system we use to provide strength with panel tanks internally by putting Tie rod 12mm -316 grade. We use to put the tie rods at a particular place where corners of four side panels meet together .it is locked with stay plate. Tie rod should be fixed after finishing all the joining process of panel pieces
| No | Name | Material |
| 1 | Manhole panel | GRP |
| 2 | External ladder | GRP/HOG |
| 3 | Internal ladder | GRP |
| 4 | Internal Tie Rod | SS316-12MM |
| 5 | Internal bracket | SS316-6MM |
| 6 | External reinforced bar | HOG |
| 7 | External bracket | HOG |
| 8 | Corner bracket | HOG |
| 9 | Bottom bracket | HOG |
| 10 | Corner frame | HOG |
| 11 | Roof support pipe | UPVC/GRP Pipes |
| 12 | External support pipe | HOG |
| 13 | Base frame | MS |
| 14 | Bolts and Nuts | Inside: SS316 A4, Outside : HOG Connection : Rubber Cap Size : Ml0,12,14 |
| 15 | Sealing Tape | EVA or PVC Foam (Maintain water _proof with flexibility) |
| 16 | Water inspection window | GRP |
| 17 | Panel | GRP |
GRP Hot Pressed Sectional Panel Tanks is well assembled by CST
1) Concrete foundation
- to be done by the contractor according to CST drawing.
- CST recommends an ideal concrete plinth size of 300mm (W) x 500mm (H),
2) Steel skid base
- As per the below table
| TANK HEIGHT | MAIN BEAM | SUB BEAM | CONCRETE PLINTH DISTANCE |
| 1m | not provided | not provided | 1000mm c/c |
| 1.5m | Hollow Section | 50mm x 50mm x 3mm | 1000mm c/c |
| 20m | Hollow Section 50mm x 50mm x 3mm | Hollow Section 50mm x 50mm x 3mm | 1000mm c/c |
| 2.5m | Hollow Section 50mm x 50mm x 3mm | Hollow Section 50mm x 50mm x 3mm | 1000mm c/c |
| 30m | Hollow Section 50mm x 50mm x 3mm | Hollow Section 50mm x 50mm x 3mm | 1000mm c/c |
| 3.5m | C-channel 150mm x 75mm or I Beam 150mm x 1 OOmm | Angle bar 6mm x 75mm x 75mm or C-channel 50mm x 1 OOmm | 1000mm c/c |
| 4.0m | C-channel 150mm x 75mm or I Beam 150mm x I Beam 150mm x 1 OOmm | C-channel 50mm x 1 OOmm | 1000mm c/c |
3) After finishing the foundation and skid base, Panels will be joined with help of Gasket and Nut Bolt Washers + Silicon rubber sealant (food grade) for
added waterproofing
- First is to connect the bottom (base panels)
- Side Panels (wall panels) should be connected with the L-Angle
- L-Angle should be placed vertically at the corners of the tank
- Then roof panel with help of pipe support
4) Minimum 500 mm space required on all sides and from the top for installation
Testing shall be carried out upon completion of Installation of a mechanical contractor and should be completed within 7 working days of assembly . This shall
include the final setting of float valves level switches and any other connection which requires setting.
The testing and compliance of panels, sealant , Connections and fixing shall be as listed in WRAS Water Fittings and Materials Directory and current water
regulations.
