Insulated Water Tank
An insulated water tank is a container specially designed for storing hot water. It uses special insulation materials and technologies to reduce heat loss and ensure that the hot water stored in it can maintain a suitable temperature for a long time. Insulated water tanks are widely used in home, commercial and industrial environments, especially in places where a continuous supply of hot water is required, such as bathrooms, kitchens, hotels, etc.
The insulated water tank itself does not heat, but relies on a water heater or other heating device to heat the water before storing it in the water tank. Its main function is to use an efficient insulation layer to slow down the rate of heat loss as much as possible, thereby maintaining the water temperature in a relatively stable state. In this way, even without continuous heating, users can get warm water for a long time.
The importance of insulated water tanks in modern society is increasingly prominent due to their excellent insulation performance, convenient operation and wide range of applications. It plays an important role in improving the quality of life and promoting energy conservation and emission reduction.
Insulated Water Tank Structure
Polyurethane foam steel plate
Rubber foam aluminum foil board
If the GRP water tank, hot-dip galvanized water tank, or stainless steel water tank needs to maintain a constant temperature for the stored liquid, or when there is a need for antifreeze, ordinary water tanks will not be able to meet the requirements. At this time, it is necessary to adopt insulation technology for the water tank. Wrap a layer of insulation on the outer surface of the ordinary water tank to prevent stable transmission, and then cover the outer layer with ordinary metal plates, and a common insulation water tank is formed.
Composition of insulation water tank
Our common insulation water tanks generally include three layers: inner surface layer + insulation layer + outer surface layer.
1.Inner surface layer
The inner layer of the non-insulated water tank is the same as other water tanks, with the same material, size, construction and installation. It is the structural layer and load-bearing layer of the non-insulated water tank.
2 Insulation layer
The insulation layer of the insulated water tank is generally made of insulation materials, such as polyurethane, rubber, etc., which are high-efficiency insulation materials that integrate closed microporous structure and mesh fiber structure. The insulation layer plays the role of isolating the heat conduction between the liquid in the water tank and the outside world. It is generally required that the insulation layer can be used for a long time under different temperature conditions, and is not easy to age, deteriorate, non-toxic and odorless, and the insulation performance is not reduced for a long time. It is required to have the characteristics of light weight, small thermal conductivity, cold insulation, heat insulation, shock resistance, and sound absorption.
3 Surface layer
The surface layer of the insulated water tank plays the role of fixing and protecting the insulation layer. Stainless steel plate, galvanized plate, and fiberglass plate can be used. The surface layer does not participate in the force of the water tank, but the surface layer is in contact with the external environment for a long time and should have good anti-corrosion and anti-rust properties.
Installation of insulated water tank
Compared with ordinary water tanks, non-insulated water tanks have an additional insulation layer and an outer layer, so the installation and construction process also has these two parts of the installation process. The specific installation and construction methods are as follows:
1. Install the inner surface layer. The inner surface layer is installed in the same way as other water tanks. Splice the water tank panels and then connect them.
2. After the inner surface layer is spliced and installed, a leakage test must be carried out. Only after the test is passed can subsequent work be carried out. If there is leakage in the inner surface layer, it must be repaired in time.
3 .Assemble the polyurethane pressure plate insulation material, and then fill the gap between the polyurethane pressure plates with filler.
4. Install the outer surface layer.
5 .Finally, insulate the gap between the outer surface tank panels.
6. After completing the above installation operations, the water filling insulation test can be carried out before it can be put into use.
Insulated water tank application and related matters
Non-insulated water tanks are widely used in metallurgy, chemical industry, petroleum, shipbuilding, textile, medicine, transportation, thermal power, construction and other industries. They are ideal equipment for storing and maintaining constant liquid temperature. In areas where the temperature is below freezing in winter, insulated water tanks are also a good choice to ensure that the water in the water tank is not frozen.
During the installation, construction and use of stainless steel insulated water tanks, the following matters need to be noted:
1. In order to achieve the ideal insulation effect, all six sides of the water tank need to be insulated.
2. Insulated water tanks can generally use polyurethane foam or rubber aluminum foil as the insulation layer. Since rubber aluminum foil is easily affected by climate and environment, it is less used. At present, the most common method is to use polyurethane press molds for insulation. The thickness of the press molds must be above 40-50mm.
Insulated 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.
Insulated Water Tank Accessories
Comparative analysis and selection suggestions for various material options of GRP water tank accessories
Optional materials:
Hot-dip galvanizing: economical choice, suitable for dry, low-corrosion environments (such as ordinary tap water storage).
Stainless steel 304/316: high corrosion resistance, suitable for coastal, chemical and other corrosive environments (316 is more resistant to chloride ions and suitable for salt or disinfectant environments).
Selection suggestions:
Drinking water tank: stainless steel 304/316 is preferred to avoid zinc precipitation and water pollution after long-term immersion of the galvanized layer.
Fire water tank: hot-dip galvanizing can meet the needs and reduce costs.
Optional materials:
Spray paint: low cost, suitable for indoor dry environment, but weak anti-rust ability.
Hot-dip galvanizing: strong weather resistance, suitable for outdoor or humid environment, longer anti-corrosion life.
Selection suggestion:
Hot-dip galvanizing is a must for outdoor water tanks or high humidity areas.
Optional materials:
Hot-dip galvanizing: suitable for non-corrosive liquids (such as fire water, rainwater collection).
Stainless steel 304/316: suitable for drinking water, acid, alkali or chlorine-containing liquids (such as swimming pool water, industrial wastewater).
Selection suggestions:
Food grade scenarios: Stainless steel 304/316 must be used.
Optional materials:
Hot-dip galvanizing: general purpose, suitable for normal temperature water, low pressure non-corrosive media.
Stainless steel 304/316: high pressure resistant, corrosion resistant, suitable for chemical or seawater environment.
PVC: lightweight, acid and alkali resistant, suitable for low pressure, low temperature chemical liquids (such as acid and alkali storage tanks).
Selection suggestions:
Drinking water pipeline: stainless steel 304 flange + food grade sealing gasket.
Industrial wastewater: PVC flange (need to avoid high temperature and high pressure).
Optional materials:
Food grade EPDM: non-toxic, aging-resistant, suitable for drinking water and food industries, temperature resistance range -50℃~150℃.
Selection suggestions:
White and black are available
Optional types:
Glass with brass valve: intuitive display of water level, but glass is fragile and needs to be protected from collision, suitable for fixed installation and easy maintenance.
Float type: mechanical structure, vibration-resistant, suitable for mobile equipment or industrial environments with large vibrations.
Selection suggestions:
Fire water tank: float type is more durable.
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