GRP Water Tank
GRP Water Tank Structure
The GRP water tank consists of five parts: SMC panel, ladder, manhole, C-type groove base and flange.
8. External ladder 9. C-channel steel base 10. Concrete foundation 11. Sewage outlet 12. Sealing strip 13. SMC water tank panel 14. External tie plate 15. Water inlet
Accessories optional material
● Bolts and Nuts - 1. Hot-Dip Galvanized 2. 304/316 Stainless Steel ● Channel Base - 1. Painted 2. Hot-Dip Galvanized
● Internal Structure - 1. Hot-Dip Galvanized 2. 304/316 Stainless Steel ● Flange - 1. Hot-Dip Galvanized 2. 304/316 Stainless Steel
● Sealing Rubber - 1. Food-Grade White EPDM 2. Silicone ● Water Level Indicator - 1. Glass, Brass Valve 2. Float Type
GRP Water Tank Panel Properties
Lightweight and high strength
The weight of the GRP water tank is only 1/4 of that of the steel plate water tank and 1/15 of that of the concrete water tank, which greatly reduces the load of the building structure and saves engineering costs.
The SMC molding process is adopted, and the concave arc design in the middle of the plate enhances the pressure bearing capacity and has excellent seismic and impact resistance.
Corrosion resistance and water quality safety
The food-grade resin substrate ensures that the water quality is pollution-free and is suitable for domestic water, fire protection and food industry storage
The acid and alkali resistance and anti-corrosion properties are remarkable, especially suitable for complex environments such as agricultural irrigation (pesticide ratio) and acid and alkali liquid storage in chemical plants.
Insulation and weather resistance
The insulation layer design keeps the water temperature fluctuation within ±2℃, which is suitable for municipal heating, hotel hot water systems and other scenarios.
It has strong adaptability to extreme climates, such as high temperatures in deserts and tropical humid environments, and the modular structure can resist thermal expansion and contraction deformation.
GRP Water Tank Panel Thickness (mm)
GRP Water Tank Panel Weight
Product Overview
• Matrix Material: Food-grade resin that meets the national drinking water hygiene standards (usually orthophthalic, isophthalic or higher performance vinyl ester resin) is used to ensure safe water quality without pollution and odor.
• Reinforcement Material: High-strength, high-modulus alkali-free glass fiber yarn and its fabric (felt, cloth) provide excellent structural strength and toughness.
• Molding process:
◦ SMS molding: The concave arc design in the middle of the plate enhances the pressure bearing capacity and has excellent earthquake and impact resistance
• Structural design:
◦ Modular design: The standard plate combined water tank is assembled by molded standard plates (1m x 1m, 1m x 0.5m, etc.), sealing materials, metal fasteners and internal support tie rod system. It is easy to install and the capacity can be flexibly expanded.
◦ Internal support: The mesh support system composed of high-strength and corrosion-resistant materials (such as fiberglass tie rods, 304/316 stainless steel tie rods) can effectively resist water pressure, prevent the box from deformation, and ensure structural stability.
Core advantages and features
• Excellent sanitation and environmental protection:
◦ The inner lining layer is made of food-grade resin, which is smooth and dense, does not breed algae and bacteria, and keeps the water clean for long-term storage, meeting the sanitation standards for drinking water
◦ No heavy metal ion precipitation, no rust, and no leakage pollution risk.
• Super corrosion resistance:
◦ It has excellent tolerance to acids, alkalis, salts, organic solvents and various chemical media, and its corrosion resistance far exceeds that of stainless steel and carbon steel. It is especially suitable for corrosive environments (such as coastal areas and chemical industrial areas) or special water quality (such as softened water and reclaimed water).
◦ No electrochemical corrosion (rust) problems.
• Lightweight and high strength:
◦ The material density is only about 1/4 of that of steel, which greatly reduces the foundation bearing requirements, making transportation, hoisting and installation more convenient and cost-effective.
◦ High specific strength (strength/weight ratio), excellent mechanical properties, good impact resistance, compression resistance and seismic resistance.
◦ The modular water tank adopts high-quality sealing materials (such as EPDM rubber, silicone rubber) and reliable sealing structure design to ensure that all connection parts are sealed for a long time without leakage.
• Super long service life:
◦ Under normal use and maintenance conditions, the service life can reach more than 30 years or even longer, which is much higher than the traditional water tank material (concrete is prone to cracking and leakage, stainless steel welds are prone to corrosion, and galvanized steel plates are prone to rust).
• Good thermal insulation performance (optional):
◦ The thermal conductivity of FRP itself is low (about 1/100 of that of metal), and it has a certain thermal insulation effect. For water tanks with special insulation requirements, the middle layer can be customized to add insulation materials such as polyurethane.
• Flexible assembly and strong adaptability:
◦ It can be flexibly assembled like building blocks according to the on-site space conditions.
◦ Wide range of capacity, from a few tons to thousands of tons.
◦ The position, size and quantity of openings (manholes, water inlets and outlets, overflows, sewage outlets, liquid level gauge outlets, etc.) can be customized to meet different pipeline connection requirements.
◦ Accessories such as ladders, guardrails, and insect screens can be added.
• Easy installation and maintenance:
◦ The modular design of the combined water tank allows for fast and efficient on-site assembly, with low site requirements, and is particularly suitable for space-constrained or high-rise buildings.
◦ The inner wall is as smooth as a mirror, dirt is not easy to adhere to, and it is easy to clean (usually only a high-pressure water gun is needed).
◦ The daily maintenance workload is minimal.
Main application areas
• Civil buildings: Drinking water and fire water reserves for high-rise residential buildings, villas, guesthouses, schools, hospitals, government agencies.
• Commercial facilities: Water supply and fire protection system water storage for shopping malls, office buildings, airports, and stations.
• Industrial fields:
◦ Process water reserves in factory production processes.
◦ Circulating cooling water system.
◦ Softened water and pure water storage.
◦ Fire water pool.
◦ Storage of chemical liquids that meet the requirements (special resins must be selected according to the medium).
• Water treatment projects: As storage containers for raw water, recycled water, and treated clean water.
• Agricultural irrigation: Irrigation water reserves for large farms and greenhouses.
• Special fields: High-standard pure water storage in the food and beverage, pharmaceutical, and electronics industries.
GRP Water Tank Application Areas
Widely used in various water storage scenarios such as life, industry and agriculture
The water supply systems of medical institutions such as hospitals and clinics meet strict hygiene standards.
It is used for production water storage in factories and enterprises, has strong corrosion resistance, and is suitable for special water quality.
The fire protection system water storage facilities are safe and reliable, ensuring water supply needs in emergency situations.
Food processing, beverage production and other industries that have high requirements on water quality to ensure product safety.
Water storage facilities in environmental protection projects such as sewage treatment and reclaimed water reuse.
GRP Water Tank Installation Steps
Site confirmation
Ensure that the installation site is flat and solid to avoid ground subsidence or tilt.
Reserve enough operating space (generally leave more than 50cm of space around for later maintenance).
If the water tank is installed on the roof, it is necessary to confirm that the roof's load-bearing capacity meets the requirements.
Foundation production
Concrete foundation:
Cast concrete foundation (C20 or above), thickness ≥20cm, surface level (error ≤3mm/m²).
The foundation size should be slightly larger than the bottom plate size of the water tank (10-15cm wider on each side).
Channel steel foundation (suitable for large-capacity water tanks or special sites):
Use hot-dip galvanized channel steel to weld into a grid-shaped bracket, with a grid spacing of ≤50cm×50cm to ensure overall levelness.
Tools and material preparation
Tools: lifting equipment (such as forklifts, cranes), rubber hammers, spirit levels, wrenches, sealant guns, etc.
Materials: fiberglass sheets, sealants (food-grade silicone), bolts, flange interfaces, etc.
1. Installation of bottom plate
Lay the bottom plate flat on the foundation, check whether it is level, and adjust it to an error of ≤2mm.
The bottom plates are connected by bolts, and sealant is applied to the joints (both inside and outside are required).
After installation, let it stand for 24 hours for the sealant to cure.
2. Installation of side plates
Assemble the side plates according to the order of the water tank design drawings, starting from the bottom layer and splicing upward layer by layer.
Fix each side plate with bolts, and tighten the bolts evenly (avoid deformation caused by local overtightening).
Sealant is also applied to the joints to ensure no gaps.
For each layer of side plates installed, the verticality needs to be corrected with a level (error ≤5mm).
3. Installation of top plate
The top plate and side plates are connected by bolts, and the joints are sealed.
4. Installation of accessories
Inlet and outlet: Install the flange interface according to the design position to avoid uneven force when connecting the pipes.
Overflow pipe, sewage pipe: The installation height meets the design requirements, and the overflow pipe must be higher than the highest water level.
Ladder and manhole: install in a reasonable location to ensure safe maintenance.
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