1.22 × 1.22 m HDG Modular Sectional Water Tanks for Water Treatment Plants

Hot-Dip Galvanized (HDG) Modular Water Tanks are widely used in municipal water treatment, industrial water treatment, drinking water treatment, purified water systems, and large infrastructure projects due to their corrosion resistance, high structural strength, cost-effectiveness, and flexible capacity options.

So, what type of water tank should a water treatment plant choose? What are the differences between stainless steel, hot-dip galvanized, and GRP water tanks?

1. Why Do Water Treatment Plants Need Water Storage Tanks?

Water treatment plants do not necessarily require only one storage tank or one type of water tank. Different storage facilities may be required according to the specific treatment process. A typical water treatment process can be simply illustrated as:

Raw Water → Pretreatment → Filtration → Purification → Treated Water → Water Supply

1. Raw Water Storage

Raw water storage tanks are used to store water from rivers, reservoirs, groundwater sources, or other water supplies. Raw water often contains suspended particles, microorganisms, algae, chemical residues, and other impurities and therefore requires preliminary filtration, sedimentation, or other treatment processes.

At this stage, the main considerations for water tanks include:

• Storage capacity
• Structural strength
• Corrosion resistance
• Project cost
• Ease of maintenance

For large-scale raw water storage projects, hot-dip galvanized modular water tanks can be a suitable option.

2. Process Water Tanks

Process water tanks are mainly used for intermediate water storage and flow regulation during water treatment processes. Storage tanks may be required for processes such as filtration, sedimentation, softening, and reverse osmosis.

At this stage, water quality requirements may not be as stringent as those for final drinking water storage. The main purpose is water storage and process regulation. Hot-dip galvanized water tanks or GRP water tanks can be considered for these applications due to their corrosion resistance and cost-effectiveness.

3. Purified Water Tanks

Purified water tanks are used to store water after filtration, purification, or other treatment processes. If the stored water is intended for drinking or applications with high sanitary requirements, special attention should be paid to the safety of the tank material in contact with the water.

Therefore, SUS304 or SUS316 stainless steel modular water tanks are commonly considered for applications with higher water quality and hygiene requirements.

2. Why Are Hot-Dip Galvanized Water Tanks Suitable for Water Treatment Projects?

Hot-dip galvanized water tanks are manufactured using Q235 steel panels that undergo hot-dip galvanizing to form a protective anti-corrosion coating. They offer high structural strength and good cost-effectiveness.

Water treatment projects generally require large storage capacities, which can result in significant water tank construction costs. Therefore, selecting a tank solution that balances cost, durability, and safety is particularly important for large-scale engineering projects with strict budget requirements. Hot-dip galvanized modular water tanks are one practical option.

GRP water tanks can also offer good cost-effectiveness and excellent corrosion resistance. However, for projects exposed to high temperatures and prolonged sunlight, long-term outdoor exposure may accelerate resin aging, potentially resulting in surface chalking, discoloration, or cracking. Over time, degradation of the resin matrix may affect the bonding between the resin and glass fibers, which can lead to a reduction in stiffness and load-bearing performance.

For long-term outdoor applications, an additional protective layer, such as rubber-plastic insulation foam, can be installed on the exterior of the tank to provide additional protection.

Stainless steel water tanks, like hot-dip galvanized water tanks, offer high structural strength. In addition, stainless steel tanks made from SUS304 or SUS316 stainless steel are well suited to applications with higher water quality and hygiene requirements. However, due to the higher material cost of stainless steel, stainless steel water tanks are generally more expensive than hot-dip galvanized and GRP water tanks.

Overall, we consider hot-dip galvanized water tanks to be a suitable solution for many large-scale water treatment projects. Water treatment companies can also consider a combination of different water tank types according to water quality requirements, treatment processes, installation conditions, and project budget.

3. Modular Water Tank Solutions

Oudrey Metal Products (Linyi) Co., Ltd. is located in Linyi, Shandong, China, and specializes in the R&D, manufacturing, customization, and supply of modular water tanks and related water tank components.

We provide:

Stainless Steel Water Tanks

Hot-Dip Galvanized Water Tanks

GRP/FRP Water Tanks

GSC Composite Water Tanks

and other modular water storage solutions.

Our manufacturing capabilities include water tank panel processing, precision stamping, and modular water tank production. Based on the capacity, dimensions, water quality, and application requirements of different water treatment projects, we can provide customized water tank products and technical solutions.

For overseas water treatment projects, Oudrey can provide water tank selection and technical configuration based on the following project information:

Tank Capacity + Dimensions + Water Type + Application + Installation Location

Reference for Matching Water Tank Panel Thickness and Height Values

Height	Bottom Board	1st Layer	2nd Layer	3rd Layer	4th Layer	5th Layer	Top board
5000 mm	5 mm	5 mm	5 mm	4 mm	3 mm	2.5 mm	2 mm
4500 mm	5 mm	5 mm	5 mm	4 mm	3 mm	2.5 mm	2 mm
4000 mm	5 mm	5 mm	4 mm	3 mm	2.5 mm		2 mm
3500 mm	4 mm	4 mm	3 mm	3 mm	2.5 mm		2 mm
3000 mm	4 mm	4 mm	3 mm	3 mm			2 mm
2500 mm	4 mm	4 mm	3 mm	3 mm			2 mm
2000 mm	3 mm	3 mm	3 mm				2 mm
1500 mm	3 mm	3 mm	3 mm				2 mm
1000 mm	3 mm	3 mm					2 mm

Panel Reinforcement Rib Shape

Flexible Tank Dimensions

The tank can be assembled using standard panel sizes, including:

• 1.22 × 1.22 m
• 1 × 1 m
• 1 × 0.5 m
• 0.5 × 0.5 m

Different numbers and combinations of panels can be used according to the required tank capacity and installation space.

Modular Panel Standard

We offer a variety of panel sizes:

Among them, the 1220 × 1220 mm (4ft × 4ft) panel is our main product, supplied globally on a stable basis. It is especially popular in Southeast Asia, India, the Middle East, South America, and Africa.

The above weights are for reference only. Actual weights may vary slightly.

4ft × 4ft International Standard Module

Unlike non-standard tank systems, our product is designed based on the globally recognized 4ft × 4ft modular grid system:

• Standard panel size: 1220 × 1220 mm (4ft × 4ft)
• Compatible with international engineering design standards
• Optimized for container loading and shipping efficiency
• Reduces on-site labor and installation cost
• Improves construction efficiency

👉 Especially suitable for projects in the USA, Canada, Australia, the Middle East, and Africa.

For large farms, agricultural parks, livestock farms, and agricultural irrigation projects, the tank capacity, dimensions, panel configuration, and supporting structure can be customized according to project requirements.

Modular Steel Water Tank Manufacturer in China

We are one of China’s leading manufacturers of modular steel water tank solutions, specializing in the R&D and production of hot-dip galvanized, GRP/FRP, and stainless steel water tank materials.

We provide comprehensive services including water tank project design, panel material manufacturing, transportation, installation guidance, and OEM/ODM customization.

Our products are widely used in agricultural irrigation, livestock farming, fire water storage, industrial water storage, commercial buildings, and other water storage projects, and are exported to overseas markets worldwide.

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