Recently, a batch of FRP chemical storage tanks customized by a well-known environmental protection company was successfully produced at our factory (Hebei Jiarui FRP Co., Ltd.) and is currently in the final curing stage of static drying in the workshop. Once completely dry, these tanks will be directly shipped to water treatment project sites for storing key water treatment agents such as sodium hypochlorite and scale inhibitors. This progress not only signifies the mature application of FRP composite materials in high-end water treatment equipment but also provides the industry with a corrosion-resistant, long-life chemical storage solution.
FRP Material: The Ideal Choice for the Water Treatment Industry
In water treatment systems, the storage of chemical agents has always been a technical challenge. Sodium hypochlorite has strong oxidizing properties, while scale inhibitors often contain multiple complex components. Traditional metal storage tanks are highly susceptible to corrosion, leading to increased leakage risks and high maintenance costs. FRP tanks, with their excellent corrosion resistance, high strength-to-weight ratio, and good sealing performance, are gradually becoming the mainstream choice in the industry.
The chemical storage tanks manufactured for Veolia fully demonstrate the customized advantages of FRP (fiberglass reinforced plastic) material. Based on the respective chemical properties of sodium hypochlorite and scale inhibitors, the manufacturer used different ratios of corrosion-resistant resin systems and incorporated UV absorbers and anti-aging layers into the laminated structure to ensure structural stability even under long-term outdoor or humid environments. Furthermore, the tank interior undergoes a special smoothing treatment to effectively prevent chemical crystallization and scale formation, facilitating subsequent cleaning and maintenance.
Two types of tanks, each with its own specific function, precisely match the customer's needs.
The completed storage tanks are of two types, designed specifically according to the process parameters provided by the customer.
Sodium hypochlorite storage tank: Given the high oxidizing properties of sodium hypochlorite, the tank lining uses vinyl ester resin and employs a double-layer anti-seepage structure to eliminate the risk of leakage caused by micro-cracks. Simultaneously, the tank top is equipped with a breather valve and an overflow prevention device to ensure the safe discharge of gas during storage and dosing, preventing abnormal pressure.
Scale Inhibitor Storage Tank: Since scale inhibitors are mostly weakly acidic or neutral, but require high cleanliness for long-term storage, this tank uses a food-grade resin liner and features an optimized bottom venting design to prevent residue-induced failure. The outer surface of the tank is coated with an UV-resistant and weather-resistant coating, suitable for various outdoor installation environments.
During the factory inspection, the customer's on-site technical representative highly praised the tank's manufacturing process, lamination quality, and dimensional accuracy.
Static Drying: An Indispensable Process
Currently, this batch of FRP storage tanks is undergoing static drying in the workshop. According to the production engineer, for FRP products molded with thermosetting resins, post-curing and drying after demolding are crucial. During this process, the resin system continues to undergo cross-linking reactions, and the material's mechanical properties and corrosion resistance gradually reach their peak. The constant temperature and humidity environment in the workshop effectively prevents the tank surface from becoming sticky or deformed, ensuring that every tank is in optimal condition before leaving the factory.
"We require sodium hypochlorite and scale inhibitor storage tanks to stand in the workshop for at least 72 hours, during which time they undergo three visual inspections and one thickness check. Only tanks that pass all tests can proceed to packaging and shipping," the production manager added. "This is why leading international companies choose us as their FRP storage tank supplier-not just because of the quality of our materials, but also because every detail withstands rigorous inspection."
Soon to be Shipped, Ensuring Safe Project Operation
According to the plan, these storage tanks will be shipped to the water treatment project site soon after completing static drying and final cleaning. Foundation pouring and pipeline pre-installation have been completed on-site. Once the tanks are in place, the pipeline connection and commissioning phase will begin quickly. It is expected that after commissioning, they will provide the water treatment system with continuous, stable, and safe storage capacity for sodium hypochlorite and scale inhibitors, significantly reducing the risk of chemical leaks and the frequency of manual inspections.
With increasingly stringent environmental standards, the requirements for equipment reliability in water treatment facilities continue to rise. FRP chemical storage tanks, with their unique advantage of long-term operation in highly corrosive media, are being adopted by an increasing number of large water utilities.
Finally
From raw material selection and structural design to layered curing and static drying, every step determines the final service life and safety factor of the GRP storage tank. The sodium hypochlorite and scale inhibitor storage tanks manufactured for this client have successfully entered the shipment stage, further demonstrating the enormous application potential of FRP composite materials in the field of water treatment chemical storage. In the future, with further upgrades in manufacturing processes, FRP chemical storage tanks are expected to play a key role in more high-end water treatment projects, safeguarding the cleanliness and safety of water resources.