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STAINLESS STEEL PANEL WATER TANKS GRADE 304/444/316

Durable and hygienic water supply storage that’s easy to assemble and adapt to changing needs.
Sunnik Stainless Steel Tanks Why Stainless Steel Technical Certifications
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SUNNIK'S STAINLESS STEEL TANKS ARE ENGINEERED FOR SUPERIOR QUALITY AND PERFORMANCE

Just as all animals aren’t created equal, neither are all stainless steels. Sunnik offers three stainless steel grades for clients to choose from based on conditions of use and budget: SS304, SS444 and SS316.

Grade SS304 resists corrosion from a wide range of chemicals and is formulated for general liquid storage and fresh water environments. It’s the least costly option but more prone to oxidation over its service life than SS316 and SS444

Grade SS444 has a lower price point and same corrosion resistance as SS316

Grade SS316 maximizes corrosion resistance due to its high molybdenum content - suitable for harsh environments like seawater treatment plants

ALL SUNNIK’S STAINLESS STEEL IS

NSF61/ANSI/CAN (Drinking Water System Components – Health Effects) certified

considered food-safe by the U.S. Food and Drug Administration.

compliant with American Iron and Steel Institute (AISI) standards

Sunnik’s stainless steel was also the FIRST in Malaysia to receive SPAN (National Water Services Commission) approval for use in municipal water applications.

OUR STAINLESS STEEL PANEL MANUFACTURING STEPS

Producing the highest quality stainless steel panels takes stringent manufacturing practices – including using only equipment designed for stainless steel and preventing contamination with corrosion-prone metals.

1. As the first step in the process, each raw stainless steel plate is quality-controlled for exact thickness and covered with a film to protect against scratches and foreign particles. —

2. Panels are cut with fiber laser, which gives precise, burr-free cuts needing no further refinement, such as grinding, which can compromise the steel’s outer layer. —

3. To meet our quality standards, each panel is molded on a high-power press (1000MT to 1500MT) using scrupulously clean molds. Our embossed design adds to the stainless steel’s strength. —

4. The panels are welded at each corner to form flanges. Welding is performed robotically for consistent quality (poor welding can result in leaking). A three-step dye penetrant inspection is then performed to detect any pinholes formed and rewelding is done if needed. —

5. The final step is pickling and passivation following ASTM A380 Standard Practice for Cleaning, Descaling and Passivation of Stainless Steel Parts, Equipment and Systems. Panels can corrode in service if there is contamination on the surface. Pickling and passivation are chemical treatments that remove surface contaminants and promote formation of a protective film (continuous chromium-oxide passive film). —

6. Hydrostatic test —

3. To meet our quality standards, each panel is molded on a high-power press (1000MT to 1500MT) using scrupulously clean molds. Our embossed design adds to the stainless steel’s strength. —

4. The panels are welded at each corner to form flanges. Welding is performed robotically for consistent quality (poor welding can result in leaking). A three-step dye penetrant inspection is then performed to detect any pinholes formed and rewelding is done if needed. —

5. The final step is pickling and passivation following ASTM A380 Standard Practice for Cleaning, Descaling and Passivation of Stainless Steel Parts, Equipment and Systems. Panels can corrode in service if there is contamination on the surface. Pickling and passivation are chemical treatments that remove surface contaminants and promote formation of a protective film (continuous chromium-oxide passive film). —

6. Hydrostatic test —

MODULAR STAINLESS STEEL WATER TANKS – FLEXIBLE AND EASY TO INSTALL

Sunnik stainless steel water tanks are modular - built from panels that are either 1m x 1m (approx. 3ft. x 3ft.) or 1.22m x 1.22m (approx. 4ft. x 4ft.) panels, making them easy to install. Their size, shape, and location are both highly adaptable, both at time of installation and later if needs have changed. They are watertight thanks to a state-of-the-art nontoxic sealant between the panels.

Panels are easily transported in pallets of up to 25 per bundle (equating to one 24,000 liter tank). This portability enables a range of transportation options, minimizes transportation costs, and facilitates transportation to rural areas.

Each pallet weighs less than 1000kg and can be unloaded separately - eliminating the need for cranes or other costly heavy equipment. No special skills or tools are needed to assemble – the bolting system requires only an impact wrench. If a tank needs repair, only the panels involved need to be changed - not the whole tank. Problems with plastic, concrete, and non-modular steel tanks can mean the entire tank has to be replaced.

SUNNIK EXCLUSIVE PANEL DESIGN

TYPE OF PANEL SIZES AVAILABLE
  • 1 x 1 or 1 x 0.5
  • 1 x 1.5m
  • 4ft x 4ft or 4ft x 2ft

Flexible and easy-to-install

BS 1564: 1957 1M x 1M 1.22M x 1.22M
Tank Height:
1m/1.22m		 Bottom, sides walls – 2.0mm Bottom, sides walls – 2.0mm
Tank Height:
2m/2.44m		 Bottom, 1st tier – 2.5mm;
side walls – 2.0mm		 Bottom, 1st tier – 2.5mm;
side walls – 2.0mm
Tank Height:
3m/3.66m		 Bottom, 1st tier – 3.0mm;
2nd tier – 2.5mm;
3rd tier – 2.0mm 		Bottom, 1st tier – 3.0mm;
2nd tier – 2.5mm;
3rd tier – 2.0mm
Tank Height:
4m/4.88m		 Bottom, 1st tier – 4.0mm;
2nd tier – 3.0mm;
3rd tier – 2.5mm;
4th tier – 2.0mm 		Bottom, 1st tier – 4.0mm;
2nd tier – 3.0mm;
3rd tier – 2.5mm;
4th tier – 2.0mm
Roof Cover(s) Min 1.0mm or 1.5mm Min 1.0mm or 1.5mm

Note: Thickness of panel is to manufacturing specification

Finite Element Analysis

INTERNAL REINFORCEMENT STRUCTURE

EXTERNAL REINFORCEMENT STRUCTURE

Project References

Stainless Steel 316L Water Tanks

Burj Khalifa, Dubai

Stainless Steel 316 Water Tanks

Kuala Lumpur, Malaysia

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