What is a GRP water tank? The following is a comprehensive introduction to FRP water tank, covering material properties, process technology, application scenarios and industry dynamics:

Definition and composition

GRP water tank are composite water storage equipment with glass fiber reinforced plastic (FRP) as the core. They are assembled from SMC molded water tank plates (sheet molding compounds) through bolts and sealing materials. Its core material is food-grade resin (such as unsaturated polyester resin) to ensure that the water quality meets the "Standards for Drinking Water".

• Structural composition:

Molded plates: standard sizes are 1000×1000mm, 1000×500mm, 500×500mm, designed with a modulus of 500mm, and can be flexibly assembled into a capacity of 0.125~1500 cubic meters.

Support system: "concave" or angle iron-shaped tie bars are used inside, the support spacing is ≤1 meter, and the compressive strength is improved through reinforced support.

Accessories: including inlet/outlet pipe flanges, overflow pipes, sewage pipes, vents, manholes and internal and external ladders.

Classification and process technology

• Molding process

SMC compression molding: through high temperature and high pressure mechanical pressing, the plate strength is uniform, the seismic and impact resistance is excellent, and it is the international mainstream process (90% of high-rise buildings use it).

• Classification by function

Domestic water tank, fire water tank, insulation water tank (polyurethane foam layer thickness is 5cm below 15T, 7cm above 15T), acid and alkali resistant storage tanks, etc.

• Material selection

Standard for plates: SUS fiberglass plates with optional thickness of 5~16mm and nickel content ≥8%, with strict tolerances.

Sealing material: customized non-toxic sealing tape, small elastic deformation, and a service life of more than 30 years.

Core performance advantages

• Physical properties

Lightweight and high strength: density 1.5~2.0g/cm³ (only 1/4 of steel), tensile strength close to carbon steel, and specific strength comparable to alloy steel.

Corrosion resistance: resistant to acid, alkali, salt spray and chemical media corrosion, suitable for corrosive environments such as chemical industry and medicine.

• Environmental adaptability

Temperature range: conventional models are suitable for water temperatures of 0~80℃, and customized models can withstand high temperature hot water.

Insulation and flame retardant: non-conductive and non-thermal, flame retardant performance is better than wood and metal.

• Hygiene and maintenance

The inner wall is smooth, inhibiting the growth of algae, and the cleaning cycle is extended to half a year, reducing maintenance costs.

The service life is more than 50 years, far exceeding concrete (20~30 years) and steel plate water tanks (10~15 years).

Application field expansion

• Civil field

High-rise buildings: replace traditional concrete water tanks to solve the problem of secondary water supply pollution

Recycled water reuse: community rainwater collection and sewage treatment intermediate storage tanks.

• Industrial field

Chemical medicine: storage of acid and alkali solutions, pure water and high-purity media, meeting GMP standards.

Power and manufacturing: circulating cooling water system, process water storage.

• Agriculture and environmental protection

Arid areas: rainwater collection and irrigation water storage to improve water resource utilization.

New energy supporting: photovoltaic power station cooling water storage, seawater desalination pretreatment container.

Installation and maintenance technical details

• Installation specifications

Basic requirements: concrete strip foundation height 300~500mm, horizontal deviation ≤2mm, diagonal error ≤20mm.

Space reservation: box and wall maintenance channel ≥800mm, top operation space ≥500mm.

• Construction process

Channel steel welding → bottom plate assembly (bolt pre-tightening 3~4 times anti-crack plate) → side plate and tie bar installation → top plate sealing → water injection test (no leakage for 24 hours).

Common problems and maintenance

Leakage causes: insufficient resin content, lining design defects or process errors (such as bubbles not completely discharged).

Solution: small cracks are repaired with sealant, and large cracks are replaced with plates; joints that leak need to be re-tightened with bolts or adjusted with rubber strips

Glass fiber reinforced plastic water tanks have become a revolutionary alternative to traditional water storage equipment due to their lightweight, corrosion-resistant, and long life characteristics. In the future, with breakthroughs in composite material technology (such as nano-enhanced resins) and the popularization of intelligent functions, their application scenarios will be further expanded to emerging fields such as marine engineering and hydrogen energy storage and transportation. At the same time, driven by circular economy policies, the proportion of recyclable SMC materials will increase significantly, helping the industry's green transformation